Docol® 900M martensitic

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    General Product Description

    Docol 900M 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, EG: thickness 0.50-2.10 mm, width up to 1527 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 %)
      Min. inner bending radius for a 90° bend
      Docol CR700Y900T MS SSAB UC, EG L 700 - 1000 900 - 1100 3 3.0 x t
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      Comparison

        The testing of mechanical properties of electrogalvanized products is conducted without coating.

        Chemical Composition (ladle analysis)

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          Coating C
          (max %)
          Si
          (max %)
          Mn
          (max %)
          P
          (max %)
          S
          (max %)
          Al
          (%)
          Nb+Ti
          (max %)
          Docol CR700Y900T MS UC, EG 0.08 0.40 2.40 0.025 0.010 From 0.015 0.10
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            Tolerances

            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 products upon request.

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              Thickness
              (mm)
              Max height 1)
              (mm)
              0.80 - 0.99 8
              1.00 - 1.39 7
              1.40 - 1.59 6
              1.60 - 1.79 5
              1.80 - 2.10 4
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              Comparison

                Thickness
                (mm)
                0.80 - 0.99
                Max height 1)
                (mm)
                8
                Thickness
                (mm)
                1.00 - 1.39
                Max height 1)
                (mm)
                7
                Thickness
                (mm)
                1.40 - 1.59
                Max height 1)
                (mm)
                6
                Thickness
                (mm)
                1.60 - 1.79
                Max height 1)
                (mm)
                5
                Thickness
                (mm)
                1.80 - 2.10
                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 Coating mass per side, single spot test (g/m2) Thickness per side informative (µm)
                  EG 25/25 EN 10152 12 - 1.7 -
                  EG 50/50 EN 10152 29 - 4.1 -
                  EG 75/75 EN 10152 47 - 6.6 -
                  EG 100/100 EN 10152 65 - 9.1 -
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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.

                    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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