Docol® Tube 980DP

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General Product Description

Docol® Tube 980 is advanced ultra-high-strength precision tube made from dual-phase steel. Available in circular, square and rectangular shapes, it comes either with cold rolled (uncoated) or galvanized surface. Customized shapes and other tailoring options are available upon request. Typical uses include automotive safety parts, where lightness and energy absorption are important.

Dimension Range

Docol Tube 980DP is available in circular, square and rectangular shapes.

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    Shapes Dimensions
    Circular (mmin) 28 - 601.1 - 2.4
    Square (mmin) 25x25 - 50x50
    Rectangular (mmin) 40x20 - 60x40
    Wall thickness (mmin) 1.0 - 2.00.039 - 0.079
    Mill length (mm) 6000
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      Shapes
      Circular (mmin)
      Dimensions
      28 - 601.1 - 2.4
      Shapes
      Square (mmin)
      Dimensions
      25x25 - 50x50
      Shapes
      Rectangular (mmin)
      Dimensions
      40x20 - 60x40
      Shapes
      Wall thickness (mmin)
      Dimensions
      1.0 - 2.00.039 - 0.079
      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)
        281.1 0.666 0.825 0.980
        301.2 0.715 0.886 1.05 1.38
        321.3 0.765 0.948 1.13 1.48
        351.4 0.838 1.04 1.24 1.63
        381.5 0.912 1.13 1.35 1.78
        401.6 1.20 1.42 1.87
        411.6 1.22 1.46 1.92
        44.51.75 1.32 1.57 2.07
        481.9 1.44 1.72 2.27
        502.0 1.79 2.37
        552.2 1.98 2.61
        572.2 2.05 2.71
        602.4 2.16 2.86
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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)
            25 x 25 0.715 0.886 1.05 1.38
            30 x 30 1.10 1.30 1.68
            32 x 32 1.18 1.39 1.80
            35 x 35 1.29 1.53 1.99
            40 x 40 1.77 2.31
            50 x 50 2.24 2.93
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              Rectangular Dimensions

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                Height x Width (mm) 1.25 mm (kg/m) 1.5 mm (kg/m) 2.0 mm (kg/m)
                40 x 20 1.10 1.30 1.68
                40 x 25 1.20 1.42 1.84
                40 x 30 1.29 1.53 1.99
                50 x 20 1.29 1.53 1.99
                50 x 25 1.39 1.65 2.15
                50 x 30 1.49 1.77 2.31
                50 x 40 2.00 2.62
                60 x 20 1.77 2.31
                60 x 30 2.00 2.62
                60 x 40 2.24 2.93
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                  Mechanical Properties

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                    Yield strength Rp0.2
                    (min MPa)
                    Tensile strength Rm
                    (min MPa)
                    Elongation A
                    (min %)
                    CR750Y980T-DP 750 980 5
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                      Chemical Composition (ladle analysis)

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                        C
                        (max %)
                        Si
                        (max %)
                        Mn
                        (max %)
                        P
                        (max %)
                        S
                        (max %)
                        Nb+Ti
                        (max %)
                        Cr+Mo
                        (max %)
                        B
                        (max %)
                        Cu
                        (max %)
                        CR750Y980T-DP 0.20 1.00 2.90 0.050 0.010 0.15 1.40 0.005 0.20
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                          Chemical composition meets the requirements of VDA 239-100.

                          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 < 1.0mm, when T ≤ 1.5 mm
                            g < 0.8 x T, when 1.5 mm < T ≤ 2.0 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 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 < 1.0mm, when T ≤ 1.5 mm
                              g < 0.8 x T, when 1.5 mm < T ≤ 2.0 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

                                ±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 < 1.0mm, when T ≤ 1.5 mm
                                g < 0.8 x T, when 1.5 mm < T ≤ 2.0 mm
                                Squareness of side 90° ±1°
                                Corner profile R ≤ 4.0 x T, typically 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, bundle cutting Agreed at the time of enquiry and order
                                Exact length, single cutting Agreed at the time of enquiry and order
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                                Comparison

                                  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 < 1.0mm, when T ≤ 1.5 mm
                                  g < 0.8 x T, when 1.5 mm < T ≤ 2.0 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 ≤ 4.0 x T, typically R ≤ 3.0 x T
                                  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, bundle 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, single 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
                                    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 < 1.0mm, when T ≤ 1.5 mm
                                    g < 0.8 x T, when 1.5 mm < T ≤ 2.0 mm
                                    Squareness of side 90° ±1°
                                    Corner profile R ≤ 4.0 x T, typically 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 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
                                      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
                                      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 < 1.0mm, when T ≤ 1.5 mm
                                      g < 0.8 x T, when 1.5 mm < T ≤ 2.0 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 ≤ 4.0 x T, typically R ≤ 3.0 x T
                                      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.

                                      Coating and Surfaces

                                      Surface designation and general usability

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                                        Designation Definition Usability
                                        UC Uncoated (cold rolled) Paintability or chromium plating are required
                                        GI Zinc coated (zinc 99%) Corrosion resistance is required
                                        GA Galvannealed coated (zinc 90%-iron 10%) 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
                                            UC < 0.6 μm
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                                              Designation
                                              UC
                                              Ra value
                                              < 0.6 μm

                                              Different metal coatings and minimum coating mass

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                                                Coating thickness 1)(µm) Zinc (GI) 2) (g/m2) Galvannealed (GA) 2) (g/m2)
                                                7 GI50/50 GA50/50
                                                8 GI60/60 GA60/60
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                                                  1) Theoretical guidance values for coating thickness per surface.

                                                  2) Minimum coating mass - g/m2 refers the coating mass for each side in g/m2 according to VDA 239-100.

                                                  Indicative specification for proper coating selection

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                                                    Coating type Coating mass (g/m2) Coating life - marine (year) Properties
                                                    GI 50/50 10 Good weldability and formability with tolerable corrosion resistance.
                                                    GI 60/60 15 Good combination of corrosion resistance and usability.
                                                    GA 50/50 15 Superior paint adhesion and corrosion resistance as painted. Weldability in same level as cold rolled material under proper welding conditions.
                                                    GA 60/60 17 Superior paint adhesion and corrosion resistance as painted. Weldability in same level as cold rolled material under proper welding conditions.
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                                                      Delivery Conditions

                                                      The tubes are not intended to undergo any heat treatment after welding and sizing as that may alter the mechanical properties of the material.

                                                      The tubes are oiled with anti-corrosive oil.

                                                      Fabrication and Other Recommendations

                                                      For information concerning fabrication, see SSAB´s brochures on www.ssab.com or consult Tech Support.

                                                      Appropriate health and safety precautions must be taken when bending, welding, cutting, grinding or otherwise working on the products.

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