Docol® 1200M martensitic

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General Product Description

Docol 1200M is available both as hot rolled and cold rolled. Docol 1200M martensitic steel helps improve crashworthiness and ensure a lightweight design and cost-efficient production methods for the automotive industry. Docol is one of the strongest cold rolled advanced high-strength steels on the market and has become the material of choice for automotive applications such as side impact beams, bumpers and structural components.

Dimension Range

Cold rolled / UC: thickness 0.50-2.10 mm, width up to 1527 mm.

Cold rolled / EG: thickness 0.80-1.80 mm, width up to 1200 mm.

Hot rolled / UC: thickness 2.00-5.00 mm, width up to 1440 mm.

Slit strip and cut to length sheets are available upon request.

Grade and coating specific restrictions on available dimensions may occur.

Mechanical Properties

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    Standard Coating Test direction
    Yield strength Rp0.2
    (MPa)
    Tensile strength Rm
    (MPa)
    Elongation A80
    (min %)
    Elongation A5
    (min %)
    BH2
    (min MPa)
    Min. inner bending radius for a 90° bend
    Docol CR​950Y​1200T-​MS SSAB UC, EG T 950 - 1200 - 1400 3 30 3.5 x t
    Docol HR​900Y​1180T-​MS SSAB UC L 900 - 1150 1180 - 1400 5 5 30
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      The testing of mechanical properties of electrogalvanized products is conducted without coating.

      For thicknesses < 3.0 mm, Docol HR900Y1180T-MS can be adapted and certified according to VDA 239-100 upon request.

      Chemical Composition (ladle analysis)

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        Coating C
        (max %)
        Si
        (max %)
        Mn
        (max %)
        P
        (max %)
        S
        (max %)
        Al
        (%)
        Nb+Ti
        (max %)
        Cr+Mo
        (max %)
        B
        (max %)
        Cu
        (max %)
        Docol CR​950Y​1200T-​MS UC, EG 0.14 0.40 2.00 0.020 0.010 From 0.015 0.10
        Docol HR​900Y​1180T-​MS UC 0.25 0.80 2.50 0.050 0.010 0.015 - 2.00 0.25 1.20 0.005 0.20
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          Tolerances

          Hot rolled (UC): Tolerances in accordance to EN 10051

          Cold rolled (UC, EG): Tolerances in accordance to EN 10131.

          Customized dimensional and shape tolerances are available upon request.

          The following improved flatness tolerances are available for cold rolled martensitic products upon request. The tolerances are valid for mother coils only before slitting.

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            Thickness
            (mmin)
            Max height 1)
            (mm)
            0.80 - 0.990.031 - 0.039 8
            1.00 - 1.390.0394 - 0.0547 7
            1.40 - 1.590.0551 - 0.0626 6
            1.60 - 1.790.0630 - 0.0705 5
            1.80 - 2.100.0709 - 0.0827 4
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            Comparison

              Thickness
              (mmin)
              0.80 - 0.990.031 - 0.039
              Max height 1)
              (mm)
              8
              Thickness
              (mmin)
              1.00 - 1.390.0394 - 0.0547
              Max height 1)
              (mm)
              7
              Thickness
              (mmin)
              1.40 - 1.590.0551 - 0.0626
              Max height 1)
              (mm)
              6
              Thickness
              (mmin)
              1.60 - 1.790.0630 - 0.0705
              Max height 1)
              (mm)
              5
              Thickness
              (mmin)
              1.80 - 2.100.0709 - 0.0827
              Max height 1)
              (mm)
              4

              EG coated martensitic grades are supplied with improved flatness tolerances.

              1) Distance from the top surface of the strip normal to flat surface. Measured with a ruler on sheets of mother coil width and minimum length 1200 mm. Cross bow and coil set excluded.

              Coatings

              The metal coating options for Docol products include:

              Electrogalvanized coating (EG) is applied continuously by electro deposition. The coating consists of zinc (>99%). Electrogalvanized steel is characterized by its excellent surface quality and uniform coating thickness.

              Grade specific availability of metal coatings for Docol products is given in the Mechanical properties table (Coating).

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                Coating type Coating class Standard Closest in EN standard, informative 1) Coating mass per side, single spot test (g/m2) Thickness per side informative (µm)
                EG 12/12 VDA 239-100 ZE25/25 12 - 32 1.7 - 4.5
                EG 18/18 VDA 239-100 18 - 38 2.5 - 5.4
                EG 29/29 VDA 239-100 ZE50/50 29 - 49 4.1 - 6.9
                EG 47/47 VDA 239-100 ZE75/75 47 - 61 6.6 - 8.6
                EG 50/50 VDA 239-100 50 - 70 7.0 - 9.9
                EG 53/53 VDA 239-100 53 - 73 7.5 - 10.3
                EG 60/60 VDA 239-100 60 - 80 8.5 - 11.3
                EG 65/65 VDA 239-100 ZE100/100 65 - 85 9.2 - 12.0
                EG 70/70 VDA 239-100 70 - 90 9.9 - 12.7
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                Comparison

                  Docol metal coated products are available with surface quality for unexposed applications.

                  In addition to these coating masses, OEM specific coatings and single sided EG coatings are available upon request.

                  1) For GI and GA the closest informative value refers to EN 10346. For EG to EN 10152.

                  Surface Treatments

                  Uncoated (UC): available as oiled.

                  Electrogalvanized (EG): available as oiled and/or chemically passivated or phosphated.

                  All surface treatments are in accordance with RoHS directive (2011/65/EU) and do not contain Chromium VI (Cr6+). Surface treatments provide only temporary surface protection during transportation and storage. In order to avoid corrosion damages, care must be taken to keep the products dry during transportation and storage. If they become wet, they must be separated and situated so that they are dried quickly.

                  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.

                  Docol® Martensitic steel product offer

                  Docol® 900M martensitic

                  Docol® 1100M martensitic

                  Docol® 1200M martensitic

                  Docol® 1300M martensitic

                  Docol® 1400M martensitic

                  Docol® 1500M martensitic

                  Docol® 1700M martensitic

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