SSAB Form Tube 420

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General Product Description

Form Tube 420 is high-strength formable precision tube. It has 15% higher elongation values and very narrow tolerances compared with competing products. Available in circular, rectangular, square and special shapes, it comes with different coating and surface options including cold rolled, galvanized, galvannealed and galfan. Customized shapes and other tailoring options are available upon request. Typically uses include light engineering, where formability, uniform quality, different surface options and usability are important.

Dimension Range

SSAB Form Tube 420 is available in circular, square and rectangular shapes.

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Shapes	Dimensions
Circular (mmin)	16 - 88.90.63 - 3.50
Square (mmin)	19x19 - 70x70
Rectangular (mmin)	25x15 - 100x40
Wall thickness (mmin)	0.9 - 3.00.04 - 0.12
Mill length (mm)	6000

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Dimensions

Shapes

Circular (mmin)

Dimensions

16 - 88.90.63 - 3.50

Shapes

Square (mmin)

Dimensions

19x19 - 70x70

Shapes

Rectangular (mmin)

Dimensions

25x15 - 100x40

Shapes

Wall thickness (mmin)

Dimensions

0.9 - 3.00.04 - 0.12

Shapes

Mill length (mm)

Dimensions

6000

Other shapes, sizes and lengths are available upon request.

Circular Dimensions

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Outer diameter (mmin)	0.9 mm (kg/m)	1.0 mm (kg/m)	1.25 mm (kg/m)	1.5 mm (kg/m)	2.0 mm (kg/m)	2.5 mm (kg/m)	3.0 mm (kg/m)
160.63	0.335	0.370	0.455	0.536	0.691 ¹⁾	—	—
180.71	0.380	0.419	0.516	0.610	0.789	—	—
190.75	0.402	0.444	0.547	0.647	0.838	—	—
200.79	0.424	0.469	0.578	0.684	0.888	—	—
220.87	0.468	0.518	0.640	0.758	0.986	1.20 ¹⁾	—
250.98	0.535	0.592	0.732	0.869	1.13	1.39 ¹⁾	1.63 ¹⁾
281.1	0.601	0.666	0.825	0.980	1.28	1.57	1.85
301.2	0.646	0.715	0.886	1.05	1.38	1.70	2.00
321.3	—	0.765	0.948	1.13	1.48	1.82	2.15
351.4	—	0.838	1.04	1.24	1.63	2.00	2.37
381.5	—	0.912	1.13	1.35	1.78	2.19	2.59
401.6	—	0.962	1.20	1.42	1.87	2.31	2.74
411.6	—	0.990	1.22	1.46	1.92	2.37	2.81
44.51.75	—	1.07	1.33	1.59	2.10	2.59	3.07
481.9	—	—	1.44	1.72	2.27	2.81	3.33
502.0	—	—	1.50	1.79	2.37	2.93	3.48
552.2	—	—	1.66	1.98	2.61	3.24	3.85
572.2	—	—	1.72	2.05	2.71	3.36	4.00
602.4	—	—	1.81	2.16	2.86	3.55	4.22
76.13.00	—	—	—	2.76	3.65	4.54	5.41
88.93.50	—	—	—	—	4.29	5.33	6.36

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0.9 mm (kg/m)

1.0 mm (kg/m)

1.25 mm (kg/m)

1.5 mm (kg/m)

2.0 mm (kg/m)

2.5 mm (kg/m)

3.0 mm (kg/m)

Outer diameter (mmin)

160.63

0.9 mm (kg/m)

0.335

1.0 mm (kg/m)

0.370

1.25 mm (kg/m)

0.455

1.5 mm (kg/m)

0.536

2.0 mm (kg/m)

0.691 ¹⁾

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Outer diameter (mmin)

180.71

0.9 mm (kg/m)

0.380

1.0 mm (kg/m)

0.419

1.25 mm (kg/m)

0.516

1.5 mm (kg/m)

0.610

2.0 mm (kg/m)

0.789

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Outer diameter (mmin)

190.75

0.9 mm (kg/m)

0.402

1.0 mm (kg/m)

0.444

1.25 mm (kg/m)

0.547

1.5 mm (kg/m)

0.647

2.0 mm (kg/m)

0.838

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Outer diameter (mmin)

200.79

0.9 mm (kg/m)

0.424

1.0 mm (kg/m)

0.469

1.25 mm (kg/m)

0.578

1.5 mm (kg/m)

0.684

2.0 mm (kg/m)

0.888

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Outer diameter (mmin)

220.87

0.9 mm (kg/m)

0.468

1.0 mm (kg/m)

0.518

1.25 mm (kg/m)

0.640

1.5 mm (kg/m)

0.758

2.0 mm (kg/m)

0.986

2.5 mm (kg/m)

1.20 ¹⁾

3.0 mm (kg/m)

—

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Outer diameter (mmin)

250.98

0.9 mm (kg/m)

0.535

1.0 mm (kg/m)

0.592

1.25 mm (kg/m)

0.732

1.5 mm (kg/m)

0.869

2.0 mm (kg/m)

1.13

2.5 mm (kg/m)

1.39 ¹⁾

3.0 mm (kg/m)

1.63 ¹⁾

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Outer diameter (mmin)

281.1

0.9 mm (kg/m)

0.601

1.0 mm (kg/m)

0.666

1.25 mm (kg/m)

0.825

1.5 mm (kg/m)

0.980

2.0 mm (kg/m)

1.28

2.5 mm (kg/m)

1.57

3.0 mm (kg/m)

1.85

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Outer diameter (mmin)

301.2

0.9 mm (kg/m)

0.646

1.0 mm (kg/m)

0.715

1.25 mm (kg/m)

0.886

1.5 mm (kg/m)

1.05

2.0 mm (kg/m)

1.38

2.5 mm (kg/m)

1.70

3.0 mm (kg/m)

2.00

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Outer diameter (mmin)

321.3

0.9 mm (kg/m)

—

1.0 mm (kg/m)

0.765

1.25 mm (kg/m)

0.948

1.5 mm (kg/m)

1.13

2.0 mm (kg/m)

1.48

2.5 mm (kg/m)

1.82

3.0 mm (kg/m)

2.15

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Outer diameter (mmin)

351.4

0.9 mm (kg/m)

—

1.0 mm (kg/m)

0.838

1.25 mm (kg/m)

1.04

1.5 mm (kg/m)

1.24

2.0 mm (kg/m)

1.63

2.5 mm (kg/m)

2.00

3.0 mm (kg/m)

2.37

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Outer diameter (mmin)

381.5

0.9 mm (kg/m)

—

1.0 mm (kg/m)

0.912

1.25 mm (kg/m)

1.13

1.5 mm (kg/m)

1.35

2.0 mm (kg/m)

1.78

2.5 mm (kg/m)

2.19

3.0 mm (kg/m)

2.59

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Outer diameter (mmin)

401.6

0.9 mm (kg/m)

—

1.0 mm (kg/m)

0.962

1.25 mm (kg/m)

1.20

1.5 mm (kg/m)

1.42

2.0 mm (kg/m)

1.87

2.5 mm (kg/m)

2.31

3.0 mm (kg/m)

2.74

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Outer diameter (mmin)

411.6

0.9 mm (kg/m)

—

1.0 mm (kg/m)

0.990

1.25 mm (kg/m)

1.22

1.5 mm (kg/m)

1.46

2.0 mm (kg/m)

1.92

2.5 mm (kg/m)

2.37

3.0 mm (kg/m)

2.81

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Outer diameter (mmin)

44.51.75

0.9 mm (kg/m)

—

1.0 mm (kg/m)

1.07

1.25 mm (kg/m)

1.33

1.5 mm (kg/m)

1.59

2.0 mm (kg/m)

2.10

2.5 mm (kg/m)

2.59

3.0 mm (kg/m)

3.07

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Outer diameter (mmin)

481.9

0.9 mm (kg/m)

—

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.44

1.5 mm (kg/m)

1.72

2.0 mm (kg/m)

2.27

2.5 mm (kg/m)

2.81

3.0 mm (kg/m)

3.33

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Outer diameter (mmin)

502.0

0.9 mm (kg/m)

—

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.50

1.5 mm (kg/m)

1.79

2.0 mm (kg/m)

2.37

2.5 mm (kg/m)

2.93

3.0 mm (kg/m)

3.48

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Outer diameter (mmin)

552.2

0.9 mm (kg/m)

—

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.66

1.5 mm (kg/m)

1.98

2.0 mm (kg/m)

2.61

2.5 mm (kg/m)

3.24

3.0 mm (kg/m)

3.85

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Outer diameter (mmin)

572.2

0.9 mm (kg/m)

—

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.72

1.5 mm (kg/m)

2.05

2.0 mm (kg/m)

2.71

2.5 mm (kg/m)

3.36

3.0 mm (kg/m)

4.00

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Outer diameter (mmin)

602.4

0.9 mm (kg/m)

—

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.81

1.5 mm (kg/m)

2.16

2.0 mm (kg/m)

2.86

2.5 mm (kg/m)

3.55

3.0 mm (kg/m)

4.22

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Outer diameter (mmin)

76.13.00

0.9 mm (kg/m)

—

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

2.76

2.0 mm (kg/m)

3.65

2.5 mm (kg/m)

4.54

3.0 mm (kg/m)

5.41

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Outer diameter (mmin)

88.93.50

0.9 mm (kg/m)

—

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

—

2.0 mm (kg/m)

4.29

2.5 mm (kg/m)

5.33

3.0 mm (kg/m)

6.36

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¹⁾ Elongation A-value according to +CR2, 12%.

Square Dimensions

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Height x Width (mm)	1.0 mm (kg/m)	1.25 mm (kg/m)	1.5 mm (kg/m)	2.0 mm (kg/m)	2.5 mm (kg/m)	3.0 mm (kg/m)
19 x 19	0.564	0.694	0.820	1.06 ¹⁾	—	—
20 x 20	0.595	0.733	0.868	1.12 ¹⁾	—	—
25 x 25	0.752	0.930	1.10	1.44	—	—
30 x 30	0.909	1.13	1.34	1.75	2.15	2.39
32 x 32	0.972	1.20	1.43	1.88	2.31	2.58
35 x 35	1.07	1.32	1.57	2.07	2.54	2.86
40 x 40	—	1.52	1.81	2.38	2.93	3.33
50 x 50	—	1.91	2.28	3.01	3.72	4.28
60 x 60	—	—	2.75	3.64	4.50	5.22
70 x 70	—	—	—	4.26	5.29	6.16

Compare parameters

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1.0 mm (kg/m)

1.25 mm (kg/m)

1.5 mm (kg/m)

2.0 mm (kg/m)

2.5 mm (kg/m)

3.0 mm (kg/m)

Height x Width (mm)

19 x 19

1.0 mm (kg/m)

0.564

1.25 mm (kg/m)

0.694

1.5 mm (kg/m)

0.820

2.0 mm (kg/m)

1.06 ¹⁾

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Height x Width (mm)

20 x 20

1.0 mm (kg/m)

0.595

1.25 mm (kg/m)

0.733

1.5 mm (kg/m)

0.868

2.0 mm (kg/m)

1.12 ¹⁾

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Height x Width (mm)

25 x 25

1.0 mm (kg/m)

0.752

1.25 mm (kg/m)

0.930

1.5 mm (kg/m)

1.10

2.0 mm (kg/m)

1.44

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Height x Width (mm)

30 x 30

1.0 mm (kg/m)

0.909

1.25 mm (kg/m)

1.13

1.5 mm (kg/m)

1.34

2.0 mm (kg/m)

1.75

2.5 mm (kg/m)

2.15

3.0 mm (kg/m)

2.39

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Height x Width (mm)

32 x 32

1.0 mm (kg/m)

0.972

1.25 mm (kg/m)

1.20

1.5 mm (kg/m)

1.43

2.0 mm (kg/m)

1.88

2.5 mm (kg/m)

2.31

3.0 mm (kg/m)

2.58

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Height x Width (mm)

35 x 35

1.0 mm (kg/m)

1.07

1.25 mm (kg/m)

1.32

1.5 mm (kg/m)

1.57

2.0 mm (kg/m)

2.07

2.5 mm (kg/m)

2.54

3.0 mm (kg/m)

2.86

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Height x Width (mm)

40 x 40

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.52

1.5 mm (kg/m)

1.81

2.0 mm (kg/m)

2.38

2.5 mm (kg/m)

2.93

3.0 mm (kg/m)

3.33

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Height x Width (mm)

50 x 50

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.91

1.5 mm (kg/m)

2.28

2.0 mm (kg/m)

3.01

2.5 mm (kg/m)

3.72

3.0 mm (kg/m)

4.28

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Height x Width (mm)

60 x 60

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

2.75

2.0 mm (kg/m)

3.64

2.5 mm (kg/m)

4.50

3.0 mm (kg/m)

5.22

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Height x Width (mm)

70 x 70

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

—

2.0 mm (kg/m)

4.26

2.5 mm (kg/m)

5.29

3.0 mm (kg/m)

6.16

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¹⁾ Elongation A-value according to +CR2, 12%.

Rectangular Dimensions

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Height x Width (mm)	1.0 mm (kg/m)	1.25 mm (kg/m)	1.5 mm (kg/m)	2.0 mm (kg/m)	2.5 mm (kg/m)	3.0 mm (kg/m)
25 x 15	0.595	0.733	0.868	1.12 ¹⁾	—	—
30 x 10	0.595	0.733	0.868	1.12	—	—
30 x 15	0.673	0.831	0.985	1.28	—	—
30 x 20	0.752	0.930	1.10	1.44	—	—
30 x 25	0.830	1.03	1.22	1.59	1.95	—
35 x 15	0.752	0.930	1.10	1.44	—	—
35 x 20	0.830	1.03	1.22	1.59	1.95	—
40 x 20	0.909	1.13	1.34	1.75	2.15	—
40 x 25	0.987	1.22	1.46	1.91	2.34	—
40 x 30	1.07	1.32	1.57	2.07	2.54	2.86
50 x 20	1.07	1.32	1.57	2.07	2.54	2.86
50 x 25	—	1.42	1.69	2.22	2.74	3.10
50 x 30	—	1.52	1.81	2.38	2.93	3.33
50 x 40	—	1.71	2.05	2.69	3.33	3.80
60 x 20	—	1.52	1.81	2.38	2.93	3.33
60 x 30	—	1.71	2.05	2.69	3.33	3.80
60 x 40	—	1.91	2.28	3.01	3.72	4.28
70 x 25	—	—	2.16	2.85	3.52	4.04
70 x 30	—	—	2.28	3.01	3.72	4.28
70 x 50	—	—	2.75	3.64	4.50	5.22
80 x 20	—	—	2.28	3.01	3.72	4.28
80 x 30	—	—	2.52	3.32	4.11	4.74
80 x 40	—	—	2.75	3.64	4.50	5.22
80 x 60	—	—	—	4.26	5.29	6.16
100 x 40	—	—	—	4.26	5.29	6.16

Compare parameters

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1.0 mm (kg/m)

1.25 mm (kg/m)

1.5 mm (kg/m)

2.0 mm (kg/m)

2.5 mm (kg/m)

3.0 mm (kg/m)

Height x Width (mm)

25 x 15

1.0 mm (kg/m)

0.595

1.25 mm (kg/m)

0.733

1.5 mm (kg/m)

0.868

2.0 mm (kg/m)

1.12 ¹⁾

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Height x Width (mm)

30 x 10

1.0 mm (kg/m)

0.595

1.25 mm (kg/m)

0.733

1.5 mm (kg/m)

0.868

2.0 mm (kg/m)

1.12

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Height x Width (mm)

30 x 15

1.0 mm (kg/m)

0.673

1.25 mm (kg/m)

0.831

1.5 mm (kg/m)

0.985

2.0 mm (kg/m)

1.28

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Height x Width (mm)

30 x 20

1.0 mm (kg/m)

0.752

1.25 mm (kg/m)

0.930

1.5 mm (kg/m)

1.10

2.0 mm (kg/m)

1.44

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Height x Width (mm)

30 x 25

1.0 mm (kg/m)

0.830

1.25 mm (kg/m)

1.03

1.5 mm (kg/m)

1.22

2.0 mm (kg/m)

1.59

2.5 mm (kg/m)

1.95

3.0 mm (kg/m)

—

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Height x Width (mm)

35 x 15

1.0 mm (kg/m)

0.752

1.25 mm (kg/m)

0.930

1.5 mm (kg/m)

1.10

2.0 mm (kg/m)

1.44

2.5 mm (kg/m)

—

3.0 mm (kg/m)

—

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Height x Width (mm)

35 x 20

1.0 mm (kg/m)

0.830

1.25 mm (kg/m)

1.03

1.5 mm (kg/m)

1.22

2.0 mm (kg/m)

1.59

2.5 mm (kg/m)

1.95

3.0 mm (kg/m)

—

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Height x Width (mm)

40 x 20

1.0 mm (kg/m)

0.909

1.25 mm (kg/m)

1.13

1.5 mm (kg/m)

1.34

2.0 mm (kg/m)

1.75

2.5 mm (kg/m)

2.15

3.0 mm (kg/m)

—

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Height x Width (mm)

40 x 25

1.0 mm (kg/m)

0.987

1.25 mm (kg/m)

1.22

1.5 mm (kg/m)

1.46

2.0 mm (kg/m)

1.91

2.5 mm (kg/m)

2.34

3.0 mm (kg/m)

—

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Height x Width (mm)

40 x 30

1.0 mm (kg/m)

1.07

1.25 mm (kg/m)

1.32

1.5 mm (kg/m)

1.57

2.0 mm (kg/m)

2.07

2.5 mm (kg/m)

2.54

3.0 mm (kg/m)

2.86

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Height x Width (mm)

50 x 20

1.0 mm (kg/m)

1.07

1.25 mm (kg/m)

1.32

1.5 mm (kg/m)

1.57

2.0 mm (kg/m)

2.07

2.5 mm (kg/m)

2.54

3.0 mm (kg/m)

2.86

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Height x Width (mm)

50 x 25

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.42

1.5 mm (kg/m)

1.69

2.0 mm (kg/m)

2.22

2.5 mm (kg/m)

2.74

3.0 mm (kg/m)

3.10

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Height x Width (mm)

50 x 30

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.52

1.5 mm (kg/m)

1.81

2.0 mm (kg/m)

2.38

2.5 mm (kg/m)

2.93

3.0 mm (kg/m)

3.33

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Height x Width (mm)

50 x 40

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.71

1.5 mm (kg/m)

2.05

2.0 mm (kg/m)

2.69

2.5 mm (kg/m)

3.33

3.0 mm (kg/m)

3.80

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Height x Width (mm)

60 x 20

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.52

1.5 mm (kg/m)

1.81

2.0 mm (kg/m)

2.38

2.5 mm (kg/m)

2.93

3.0 mm (kg/m)

3.33

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Height x Width (mm)

60 x 30

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.71

1.5 mm (kg/m)

2.05

2.0 mm (kg/m)

2.69

2.5 mm (kg/m)

3.33

3.0 mm (kg/m)

3.80

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Height x Width (mm)

60 x 40

1.0 mm (kg/m)

—

1.25 mm (kg/m)

1.91

1.5 mm (kg/m)

2.28

2.0 mm (kg/m)

3.01

2.5 mm (kg/m)

3.72

3.0 mm (kg/m)

4.28

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Height x Width (mm)

70 x 25

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

2.16

2.0 mm (kg/m)

2.85

2.5 mm (kg/m)

3.52

3.0 mm (kg/m)

4.04

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Height x Width (mm)

70 x 30

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

2.28

2.0 mm (kg/m)

3.01

2.5 mm (kg/m)

3.72

3.0 mm (kg/m)

4.28

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Height x Width (mm)

70 x 50

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

2.75

2.0 mm (kg/m)

3.64

2.5 mm (kg/m)

4.50

3.0 mm (kg/m)

5.22

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Height x Width (mm)

80 x 20

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

2.28

2.0 mm (kg/m)

3.01

2.5 mm (kg/m)

3.72

3.0 mm (kg/m)

4.28

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Height x Width (mm)

80 x 30

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

2.52

2.0 mm (kg/m)

3.32

2.5 mm (kg/m)

4.11

3.0 mm (kg/m)

4.74

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Height x Width (mm)

80 x 40

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

2.75

2.0 mm (kg/m)

3.64

2.5 mm (kg/m)

4.50

3.0 mm (kg/m)

5.22

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Height x Width (mm)

80 x 60

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

—

2.0 mm (kg/m)

4.26

2.5 mm (kg/m)

5.29

3.0 mm (kg/m)

6.16

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Height x Width (mm)

100 x 40

1.0 mm (kg/m)

—

1.25 mm (kg/m)

—

1.5 mm (kg/m)

—

2.0 mm (kg/m)

4.26

2.5 mm (kg/m)

5.29

3.0 mm (kg/m)

6.16

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¹⁾ Elongation A-value according to +CR2, 12%.

Mechanical Properties

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Yield strength R_p0.2 (min MPa)	Tensile strength R_m (min MPa)	Elongation A (min %)
420	490	14

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Tensile strength R_m
(min MPa)

Elongation A
(min %)

Yield strength R_p0.2
(min MPa)

420

Tensile strength R_m
(min MPa)

490

Elongation A
(min %)

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Mechanical properties meet or exceed the requirements of EN 10305 (+CR2).

Chemical Composition (ladle analysis)

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C (max %)	Si¹⁾ (max %)	Mn (max %)	P¹⁾ (max %)	S²⁾ (max %)	Al_tot³⁾ (min %)
0.12	0.50	1.70	0.020 ²⁾	0.020	0.020

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Si¹⁾
(max %)

Mn
(max %)

P¹⁾
(max %)

S²⁾
(max %)

Al_tot³⁾
(min %)

C
(max %)

0.12

Si¹⁾
(max %)

0.50

Mn
(max %)

1.70

P¹⁾
(max %)

0.020 ²⁾

S²⁾
(max %)

0.020

Al_tot³⁾
(min %)

0.020

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Chemical composition meets or exceeds the requirements of EN 10305.

If other chemical elements such as Ti, Nb or V are used, the content of these elements are reported in the inspection document.

¹⁾ SSAB Form Tube H grade is suitable for high quality hot-dip galvanizing (Si < 0.03%, Si +2.5P < 0.06%)

²⁾ Low level of impurities ensure excellent formability and weldability

³⁾ This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements, such as Ti, Nb or V.

Tolerances

Tolerance Circular

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Characteristic	Circular precision tubes Tolerances meet or exceed the requirements of EN 10305-3
Outside diameter (D) ⁽¹ D < 20 mm 20 ≤ D < 32 mm 32 ≤ D < 44 mm 44 ≤ D < 55 mm 55 ≤ D < 70 mm 70 ≤ D < 80 mm 80 ≤ D < 100 mm	±0.12 mm ±0.15 mm ±0.20 mm ±0.25 mm ±0.30 mm ±0.35 mm ±0.40 mm
Out-of-roundness	The diameter tolerances include the out-of-roundness
Thickness (T)	T ≤ 1.5 mm: ±0.15 mm T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller
Straightness	Maximum 0.15% of measured length
Height of internal weld bead, g; Bead removed Bead not removed	g ≤ 0.3 mm g < 0.6 mm, when T ≤ 1.5 mm g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm
Mill length	0/+50 mm, standard length 6000 mm
Exact length, single cutting	Agreed at the time of enquiry and order
Exact length, bundle cutting	Agreed at the time of enquiry and order

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Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

Characteristic

Outside diameter (D) ⁽¹
D < 20 mm
20 ≤ D < 32 mm
32 ≤ D < 44 mm
44 ≤ D < 55 mm
55 ≤ D < 70 mm
70 ≤ D < 80 mm
80 ≤ D < 100 mm

Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

±0.12 mm
±0.15 mm
±0.20 mm
±0.25 mm
±0.30 mm
±0.35 mm
±0.40 mm

Characteristic

Out-of-roundness

Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

The diameter tolerances include the out-of-roundness

Characteristic

Thickness (T)

Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

T ≤ 1.5 mm: ±0.15 mm
T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller

Characteristic

Straightness

Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

Maximum 0.15% of measured length

Characteristic

Height of internal weld bead, g;
Bead removed
Bead not removed

Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

g ≤ 0.3 mm
g < 0.6 mm, when T ≤ 1.5 mm
g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm

Characteristic

Mill length

Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

0/+50 mm, standard length 6000 mm

Characteristic

Exact length, single cutting

Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

Agreed at the time of enquiry and order

Characteristic

Exact length, bundle cutting

Circular precision tubes
Tolerances meet or exceed the requirements of EN 10305-3

Agreed at the time of enquiry and order

¹⁾For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.

Tolerance Square

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Characteristic	Square precision tubes Tolerances meet or exceed the requirements of EN 10305-5
Outside dimensions (H) and (B), longer side¹⁾ H < 25 mm 25 ≤ H < 40 mm 40 ≤ H < 60 mm 60≤ H < 70 mm 70 ≤ H < 80 mm	±0.20 mm ±0.25 mm ±0.30 mm ±0.35 mm ±0.40 mm
Side concavity and convexity	Included in outside dimension tolerance
Thickness (T)	T≤ 1.5 mm: ±0.15 mm T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller
Straightness	Maximum 0.15% of measured tube length when shorter side length > 30 mm Maximum 0.25% of measured tube length when the shorter side length ≤ 30 mm
Location of weld seam from the centre line	On narrow side for square and rectangular, optionally on wide side. On wide side for flat oval and ellipse. ± 10% of side length or ± 3 mm, whichever is greater.
Height of internal weld bead, g; Bead removed Bead not removed	g ≤ 0.3 mm g < 0.6 mm, when T ≤ 1.5 mm g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm
Squareness of side	90° ±1°
Corner profile	R < 1.5 x T, when T ≤ 2.5 mm R < 2.2 x T, when T > 2.5 mm
Twist (V)	V ≤ 3 mm for B and H ≤ 30 mm V ≤ B/10 or ≤ H/10 for B or H > 30 mm
Mill length	0/+50 mm, standard length 6000 mm
Exact length, single cutting	Agreed at the time of enquiry and order
Exact length, bundle cutting	Agreed at the time of enquiry and order

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Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Characteristic

Outside dimensions (H) and (B), longer side¹⁾
H < 25 mm
25 ≤ H < 40 mm
40 ≤ H < 60 mm
60≤ H < 70 mm
70 ≤ H < 80 mm

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

±0.20 mm
±0.25 mm
±0.30 mm
±0.35 mm
±0.40 mm

Characteristic

Side concavity and convexity

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Included in outside dimension tolerance

Characteristic

Thickness (T)

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

T≤ 1.5 mm: ±0.15 mm
T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller

Characteristic

Straightness

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Maximum 0.15% of measured tube length when shorter side length > 30 mm
Maximum 0.25% of measured tube length when the shorter side length ≤ 30 mm

Characteristic

Location of weld seam from the centre line

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

On narrow side for square and rectangular, optionally on wide side. On wide side for flat oval and ellipse. ± 10% of side length or ± 3 mm, whichever is greater.

Characteristic

Height of internal weld bead, g;
Bead removed
Bead not removed

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

g ≤ 0.3 mm
g < 0.6 mm, when T ≤ 1.5 mm
g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm

Characteristic

Squareness of side

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

90° ±1°

Characteristic

Corner profile

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

R < 1.5 x T, when T ≤ 2.5 mm
R < 2.2 x T, when T > 2.5 mm

Characteristic

Twist (V)

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

V ≤ 3 mm for B and H ≤ 30 mm
V ≤ B/10 or ≤ H/10 for B or H > 30 mm

Characteristic

Mill length

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

0/+50 mm, standard length 6000 mm

Characteristic

Exact length, single cutting

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Agreed at the time of enquiry and order

Characteristic

Exact length, bundle cutting

Square precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Agreed at the time of enquiry and order

¹⁾For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.

Tolerance Rectangular

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Characteristic	Rectangular precision tubes Tolerances meet or exceed the requirements of EN 10305-5
Outside dimensions (H) and (B), longer side¹⁾ H < 25 mm 25 ≤ H < 40 mm 40 ≤ H < 60 mm 60≤ H < 70 mm 70 ≤ H < 80 mm 80 ≤ H < 90 mm 90 ≤ H < 100 mm 100 ≤ H < 120 mm	±0.20 mm ±0.25 mm ±0.30 mm ±0.35 mm ±0.40 mm ±0.50 mm ±0.60 mm ±0.65 mm
Side concavity and convexity	Included in outside dimension tolerance
Thickness (T)	T≤ 1.5 mm: ±0.15 mm T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller
Straightness	Maximum 0.15% of measured tube length when shorter side length > 30 mm Maximum 0.25% of measured tube length when the shorter side length ≤ 30 mm
Location of weld seam from the centre line	On narrow side for square and rectangular, optionally on wide side. On wide side for flat oval and ellipse. ± 10% of side length or ± 3 mm, whichever is greater.
Height of internal weld bead, g; Bead removed Bead not removed	g ≤ 0.3 mm g < 0.6 mm, when T ≤ 1.5 mm g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm
Squareness of side	90° ±1°
Corner profile	R < 1.5 x T, when T ≤ 2.5 mm R < 2.2 x T, when T > 2.5 mm
Twist (V)	V ≤ 3 mm for B and H ≤ 30 mm V ≤ B/10 or ≤ H/10 for B or H > 30 mm
Mill length	0/+50 mm, standard length 6000 mm
Exact length, single cutting	Agreed at the time of enquiry and order
Exact length, bundle cutting	Agreed at the time of enquiry and order

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Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Characteristic

Outside dimensions (H) and (B), longer side¹⁾
H < 25 mm
25 ≤ H < 40 mm
40 ≤ H < 60 mm
60≤ H < 70 mm
70 ≤ H < 80 mm
80 ≤ H < 90 mm
90 ≤ H < 100 mm
100 ≤ H < 120 mm

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

±0.20 mm
±0.25 mm
±0.30 mm
±0.35 mm
±0.40 mm
±0.50 mm
±0.60 mm
±0.65 mm

Characteristic

Side concavity and convexity

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Included in outside dimension tolerance

Characteristic

Thickness (T)

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

T≤ 1.5 mm: ±0.15 mm
T >1.5 mm: ±10% of nominal thickness or ±0.35 mm whichever is the smaller

Characteristic

Straightness

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Maximum 0.15% of measured tube length when shorter side length > 30 mm
Maximum 0.25% of measured tube length when the shorter side length ≤ 30 mm

Characteristic

Location of weld seam from the centre line

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

On narrow side for square and rectangular, optionally on wide side. On wide side for flat oval and ellipse. ± 10% of side length or ± 3 mm, whichever is greater.

Characteristic

Height of internal weld bead, g;
Bead removed
Bead not removed

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

g ≤ 0.3 mm
g < 0.6 mm, when T ≤ 1.5 mm
g < 0.4 x T, when 1.5 mm < T ≤ 3.0 mm

Characteristic

Squareness of side

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

90° ±1°

Characteristic

Corner profile

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

R < 1.5 x T, when T ≤ 2.5 mm
R < 2.2 x T, when T > 2.5 mm

Characteristic

Twist (V)

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

V ≤ 3 mm for B and H ≤ 30 mm
V ≤ B/10 or ≤ H/10 for B or H > 30 mm

Characteristic

Mill length

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

0/+50 mm, standard length 6000 mm

Characteristic

Exact length, single cutting

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Agreed at the time of enquiry and order

Characteristic

Exact length, bundle cutting

Rectangular precision tubes
Tolerances meet or exceed the requirements of EN 10305-5

Agreed at the time of enquiry and order

¹⁾For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.

Surface designation and general usability

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Designation	Definition	Usability
C	Cold rolled	Suitable for painting and chromium plating
H	Hot rolled and pickled	Suitable for painting and hot-dip galvanizing
Z	Zinc coated (zinc 99%)	Suitable when corrosion resistance is required
ZA	Galfan coated (zinc 95%-aluminium 5%)	Suitable when corrosion resistance and demanding forming are required
ZF	Galvannealed coated (zinc 90%-iron 10%)	Suitable when corrosion resistance and paintability are required

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Definition

Usability

Designation

Definition

Cold rolled

Usability

Suitable for painting and chromium plating

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Designation

Definition

Hot rolled and pickled

Usability

Suitable for painting and hot-dip galvanizing

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Designation

Definition

Zinc coated (zinc 99%)

Usability

Suitable when corrosion resistance is required

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Designation

Definition

Galfan coated (zinc 95%-aluminium 5%)

Usability

Suitable when corrosion resistance and demanding forming are required

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Designation

Definition

Galvannealed coated (zinc 90%-iron 10%)

Usability

Suitable when corrosion resistance and paintability are required

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Surface is slightly oiled to protect it from corrosion during transportation and short-term storage. By request, tubes can be delivered dry, however in that case SSAB will not be responsible for any possible rust.

Surface roughness, Ra

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Designation	Ra value
C	< 0.6 µm
H	< 2.0 µm

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Ra value

Designation

Ra value

< 0.6 µm

Designation

Ra value

< 2.0 µm

Different metal coatings and minimum coating mass

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Coating thickness ¹⁾(µm)	Zinc (Z)²⁾ (g/m²)	Galfan (ZA)²⁾ (g/m²)	Galvannealed (ZF)²⁾ (g/m²)
7	Z100	—	ZF100
8	—	—	ZF120
10	Z140	ZA130	ZF140
20	Z275	ZA255	—
25	Z350	ZA300	—
32	Z450	—	—
42	Z600	—	—

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Zinc (Z)²⁾ (g/m²)

Galfan (ZA)²⁾ (g/m²)

Galvannealed (ZF)²⁾ (g/m²)

Coating thickness ¹⁾(µm)

Zinc (Z)²⁾ (g/m²)

Z100

Galfan (ZA)²⁾ (g/m²)

—

Galvannealed (ZF)²⁾ (g/m²)

ZF100

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Coating thickness ¹⁾(µm)

Zinc (Z)²⁾ (g/m²)

—

Galfan (ZA)²⁾ (g/m²)

—

Galvannealed (ZF)²⁾ (g/m²)

ZF120

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Coating thickness ¹⁾(µm)

Zinc (Z)²⁾ (g/m²)

Z140

Galfan (ZA)²⁾ (g/m²)

ZA130

Galvannealed (ZF)²⁾ (g/m²)

ZF140

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Coating thickness ¹⁾(µm)

Zinc (Z)²⁾ (g/m²)

Z275

Galfan (ZA)²⁾ (g/m²)

ZA255

Galvannealed (ZF)²⁾ (g/m²)

—

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Coating thickness ¹⁾(µm)

Zinc (Z)²⁾ (g/m²)

Z350

Galfan (ZA)²⁾ (g/m²)

ZA300

Galvannealed (ZF)²⁾ (g/m²)

—

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Coating thickness ¹⁾(µm)

Zinc (Z)²⁾ (g/m²)

Z450

Galfan (ZA)²⁾ (g/m²)

—

Galvannealed (ZF)²⁾ (g/m²)

—

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Coating thickness ¹⁾(µm)

Zinc (Z)²⁾ (g/m²)

Z600

Galfan (ZA)²⁾ (g/m²)

—

Galvannealed (ZF)²⁾ (g/m²)

—

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Galfan coating ZA255 by SSAB has been granted a C3 15 (years) certification by RISE, Research Institute of Sweden AB.

¹⁾ Theoretical guidance values for coating thickness per surface.

²⁾ Minimum coating mass - g/m2 refers the total weight of coatings on both sides of a 1 m2 plate.

Indicative specification for proper coating selection

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Coating type	Coating mass (g/m²)	Coating life - marine (year)	Properties
Z	100	10	Good weldability and formability with tolerable corrosion resistance.
Z	275	25	Good combination of corrosion resistance and usability.
Z	350	30	Excellent corrosion resistance.
Z	450	40	Excellent corrosion resistance.
Z	600	60	Superior corrosion resistance.
ZA	130	40	Excellent corrosion resistance and formability.
ZA	255	80	Superior corrosion resistance in marine condition.
ZA	300	95	Superior corrosion resistance in marine condition.
ZF	100	15	Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.
ZF	120	17	Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.
ZF	140	20	Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.

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Coating mass (g/m²)

Coating life - marine (year)

Properties

Coating type

Coating mass (g/m²)

100

Coating life - marine (year)

Properties

Good weldability and formability with tolerable corrosion resistance.

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Coating type

Coating mass (g/m²)

275

Coating life - marine (year)

Properties

Good combination of corrosion resistance and usability.

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Coating type

Coating mass (g/m²)

350

Coating life - marine (year)

Properties

Excellent corrosion resistance.

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Coating type

Coating mass (g/m²)

450

Coating life - marine (year)

Properties

Excellent corrosion resistance.

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Coating type

Coating mass (g/m²)

600

Coating life - marine (year)

Properties

Superior corrosion resistance.

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Coating type

Coating mass (g/m²)

130

Coating life - marine (year)

Properties

Excellent corrosion resistance and formability.

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Coating type

Coating mass (g/m²)

255

Coating life - marine (year)

Properties

Superior corrosion resistance in marine condition.

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Coating type

Coating mass (g/m²)

300

Coating life - marine (year)

Properties

Superior corrosion resistance in marine condition.

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Coating type

Coating mass (g/m²)

100

Coating life - marine (year)

Properties

Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.

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Coating type

Coating mass (g/m²)

120

Coating life - marine (year)

Properties

Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.

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Coating type

Coating mass (g/m²)

140

Coating life - marine (year)

Properties

Superior paint adhesion and corrosion reistance as painted. Weldability in same level as cold rolled material under proper welding conditions.

SSAB Form Tube 420

General Product Description

Dimension Range

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Circular Dimensions

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Square Dimensions

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Rectangular Dimensions

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Mechanical Properties

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Chemical Composition (ladle analysis)

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Tolerances

Tolerance Circular

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Tolerance Square

Select one parameter to compare

Tolerance Rectangular

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Surface designation and general usability

Select one parameter to compare

Surface roughness, Ra

Select one parameter to compare

Different metal coatings and minimum coating mass

Select one parameter to compare

Indicative specification for proper coating selection

Select one parameter to compare

Other precision tube products

Docol® Tube R8

Docol® Tube 980DP

Docol® Tube 780DP

SSAB Boron Tube 22

SSAB Form Tube 220

SSAB Form Tube 320

Get datasheet by email

General Product Description

Dimension Range

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Comparison

Circular Dimensions

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Comparison

Square Dimensions

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Comparison

Rectangular Dimensions

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Comparison

Mechanical Properties

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Comparison

Chemical Composition (ladle analysis)

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Comparison

Tolerances

Tolerance Circular

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Comparison

Tolerance Square

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Comparison

Tolerance Rectangular

Select one parameter to compare

Comparison

Surface designation and general usability

Select one parameter to compare

Comparison

Surface roughness, Ra

Select one parameter to compare

Comparison

Different metal coatings and minimum coating mass

Select one parameter to compare

Comparison

Indicative specification for proper coating selection

Select one parameter to compare

Comparison

Other precision tube products

Docol® Tube R8

Docol® Tube 980DP

Docol® Tube 780DP

SSAB Boron Tube 22

SSAB Form Tube 220

SSAB Form Tube 320