Docol® Tube 420LA

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General Product Description

Docol® Tube 420LA is high-strength formable precision tube. Available in circular, rectangular and square shapes, it comes with different coating and surface options including cold rolled, hot rolled pickled, galvanized, galvannealed and galfan. Customized shapes and other tailoring options are available upon request. Typical uses include automotive and light engineering, where durability, formability and weldability are important.

Dimension Range

Docol Tube 420LA 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 - 60x60
    Rectangular (mmin) 25x15 - 100x40
    Wall thickness (mmin) 1.0 - 3.00.039 - 0.12
    Mill length (mm) 6000
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      Shapes
      Circular (mmin)
      Dimensions
      16 - 88.90.63 - 3.50
      Shapes
      Square (mmin)
      Dimensions
      19x19 - 60x60
      Shapes
      Rectangular (mmin)
      Dimensions
      25x15 - 100x40
      Shapes
      Wall thickness (mmin)
      Dimensions
      1.0 - 3.00.039 - 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) 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 0.370 0.455 0.536
        180.71 0.419 0.516 0.610
        190.75 0.444 0.547 0.647
        200.79 0.469 0.578 0.684
        220.87 0.518 0.640 0.758
        250.98 0.592 0.732 0.869 1.13
        281.1 0.666 0.825 0.980 1.28 1.57 1.85
        301.2 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
        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 1.79 2.37 2.93 3.48
        552.2 1.98 2.61 3.24 3.85
        572.2 2.05 2.71 3.36 4.00
        602.4 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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          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
            20 x 20 0.595 0.733 0.868 1.12
            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
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              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
                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
                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
                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 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
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                  Mechanical Properties

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                    Yield strength Rp0.2
                    (min MPa)
                    Tensile strength Rm
                    (min MPa)
                    Elongation A
                    (min %)
                    CR420LA 420 490 12
                    HR420LA 420 490 12
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                      Mechanical properties meet the requirements of EN 10305 (+CR2).

                      Chemical Composition (ladle analysis)

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                        C
                        (max %)
                        Si
                        (max %)
                        Mn
                        (max %)
                        P
                        (max %)
                        S
                        (max %)
                        Altot 1)
                        (min %)
                        CR420LA 0.16 0.55 1.70 0.025 0.025 0.020
                        HR420LA 0.16 0.55 1.70 0.025 0.025 0.020
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                          Chemical composition meets 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) 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 based on 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 < 0.8 mm, when T ≤ 1.5 mm
                            g < 0.6 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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                              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 based on 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 based on the requirements of EN 10305-3
                              The diameter tolerances include the out-of-roundness
                              Characteristic
                              Thickness (T)
                              Circular precision tubes
                              Tolerances based on 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 based on 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 based on the requirements of EN 10305-3

                              g ≤ 0.3 mm
                              g < 0.8 mm, when T ≤ 1.5 mm
                              g < 0.6 x T, when 1.5 mm < T ≤ 3.0 mm
                              Characteristic
                              Mill length
                              Circular precision tubes
                              Tolerances based on the requirements of EN 10305-3
                              0/+50 mm, standard length 6000 mm
                              Characteristic
                              Exact length, single cutting
                              Circular precision tubes
                              Tolerances based on the requirements of EN 10305-3
                              Agreed at the time of enquiry and order
                              Characteristic
                              Exact length, bundle cutting
                              Circular precision tubes
                              Tolerances based on 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

                                ±0.20 mm
                                ±0.25 mm
                                ±0.30 mm
                                ±0.35 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 < 0.8 mm, when T ≤ 1.5 mm
                                g < 0.6 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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                                  Characteristic
                                  Outside dimensions (H) and (B), longer side1)
                                  H < 25 mm
                                  25 ≤ H < 40 mm
                                  40 ≤ H < 60 mm
                                  60≤ H < 70 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
                                  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 < 0.8 mm, when T ≤ 1.5 mm
                                  g < 0.6 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 < 0.8 mm, when T ≤ 1.5 mm
                                    g < 0.6 x T, when 1.5 mm < T ≤ 3.0 mm
                                    Squareness of side 90° ±1°
                                    Corner profile R ≤ 3.0 x T
                                    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