Docol® 600DP dual phase

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General Product Description

Docol 600DP dual-phase steel has good formability and weldability and is suitable for car safety components such as seat racks. This steel undergoes special heat treatment, producing mainly two phase structure. Ferrite that imparts unique forming properties represents one phase, and martensite that accounts for the strength represents the other phase. Bainite may be present as complementary phase.

Dimension Range

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

Cold rolled / GI, GA, ZA: thickness 0.70-3.00 mm, width up to 1520 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 %)
    n4-6
    (min)
    n10-20/Ag
    (min)
    BH2
    (min MPa)
    Min. inner bending radius for a 90° bend 2)
    Docol CR​330Y​590T-​DP VDA 239-100 UC L 330 - 430 590 - 700 20 0.18 0.14 30 0.0 x t
    VDA 239-100 GI, GA, ZA L 330 - 430 590 - 700 20 1) 0.18 0.14 30 1.2 x t
    Docol CR​280Y​600T-​DL SSAB UC T 280 - 360 600 - 700 20 0.0 x t
    Docol CR​350Y​600T-​DP SSAB UC T 350 - 450 600 - 700 16 0.0 x t
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      1) For GA coatings the minimum elongation value is reduced by 2 units.

      2) In some cases tight bending radius may cause micro-cracking of the coating in the bend area. Where design permits, users are encouraged to employ larger radius.

      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​330Y​590T-​DP UC 0.12 0.40 1.60 0.025 0.010 0.015 - 1.50 0.10 1.00 0.005 0.20
        GI, GA, ZA 0.15 0.80 2.50 0.050 0.010 0.015 - 1.5 0.15 1.40 0.005 0.20
        Docol CR​280Y​600T-​DL UC 0.12 0.60 1.80 0.020 0.010 From 0.015 0.10
        Docol CR​350Y​600T-​DP UC 0.12 0.40 1.00 0.025 0.010 From 0.015 0.10
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          Tolerances

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

          Hot-dip galvanized (GI, GA, ZA): Tolerances in accordance to EN 10143.

          Customized dimensional and shape tolerances are available upon request.

          Coatings

          The metal coating options for Docol products include:

          Hot-dip zinc coating (GI) consists almost entirely of zinc (>99%). It is lead free, resulting in a small zinc spangle size. The coating provides good corrosion protection.

          Galvannealed coating (GA) is a zinc-iron alloy coating having an iron content of approximately 10%. Galvannealed is produced by post-heat treatment in continuous hot-dip coating process. Galvannealed provides excellent resistance weldability and corrosion protection of painted products.

          Galfan coating (ZA) is a zinc-aluminium alloy coating having the eutectic composition approximately of 95% Zn and 5% Al. Galfan is produced in continuous hot-dip coating process. Galfan has better anticorrosive and forming properties than conventional hot-dip zinc coating (GI).

          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 10346, informative Coating mass per side, single spot test (g/m2) Thickness per side informative (µm)
            GI 40/40 VDA 239-100 Z100 40 - 60 5.6 - 8.5
            GI 50/50 VDA 239-100 50 - 70 7.0 - 9.9
            GI 60/60 VDA 239-100 Z140 60 - 90 8.5 - 12.7
            GI 70/70 VDA 239-100 70 - 100 9.9 - 14.1
            GI 85/85 VDA 239-100 85 - 115 12.0 - 16.2
            GI 115/115 VDA 239-100 Z275 115 - 155 16.2 - 21.8
            GA 40/40 VDA 239-100 ZF100 40 - 60 5.6 - 8.5
            GA 50/50 VDA 239-100 ZF120 50 - 80 7.0 - 11.3
            ZA 95 EN 10346 ZA95 7.0 -
            ZA 130 EN 10346 ZA130 10.0 -
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