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SSAB Boron 27Cr

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    General Product Description

    SSAB Boron 27Cr is steel for quench- and press hardening. The degree of hardness and toughness that can be achieved after heat-treatment will provide the final products with wear- and shock resistance properties that assure longer lifetime.

    Dimension Range

    SSAB Boron 27Cr is available in thickness range 1.00-15.00 mm and widths up to 1800 mm as coils, slit coils and CTL. Lengths up to 16 meters as cut to length.

    For detailed available thickness and width combinations, please contact SSAB.

    Mechanical Properties

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      Condition Typical yield strength
      (MPa), not guaranteed      		 Typical tensile strength
      (MPa), not guaranteed      		 Typical Elongation A (%),
      not guaranteed      		 Typical Hardness
      (HRC), not guaranteed      		 Typical hardness
      (HBW), not guaranteed
      Cold rolled annealed 400 550 25 — 165
      Cold rolled water quenched — 1735 — 50 510
      Cold rolled oil quenched — 1575 — 48 460
      Hot rolled 420 620 22 — 170
      Hot rolled annealed 355 535 25 — 165
      Hot rolled water quenched 1190 1690 8 50 510
      Hot rolled oil quenched 970 1350 9 47 448
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        Bending radius

        Minimum bending radius of hot rolled strip products is 2 x sheet thickness. A tighter bending radius, 1 x sheet thickness, can be guaranteed for the annealed strip products.

        Material Testing

        A test certificate according to EN 10204/3.1 (chemical composition only) is part of the delivery.

        A test certificate according to EN 10204/3.1 (with mechanical test) can be provided by special agreement only.

        Chemical Composition (heat analysis)

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          C
          (%)          		 Si
          (%)          		 Mn
          (%)          		 S
          (max %)          		 P
          (max %)          		 Cr
          (%)          		 B
          (%)
          0.24 - 0.30 0.10 - 0.30 1.10 - 1.40 0.010 0.020 0.30 - 0.60 0.0008 - 0.0050
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          Comparison

            The steel is grain refined.

            Carbon Equivalent CEV

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              Condition Hot rolled strip
              Typical CEV (%) 0.54
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                Condition
                Typical CEV (%)
                Hot rolled strip
                0.54

                Tolerances

                SSAB Boron steels are delivered with SSAB Boron tolerances which meet and exceed the requirements in corresponding EN standards. Tighter tolerances are available on request.

                Thickness

                Cold rolled coils and sheet products: according to EN 10131. Tighter tolerances are available on request.

                Hot rolled coils and sheet products: according to SSAB Boron thickness tolerances that exceed EN 10051 and correspond to 2/3 of EN 10051 as default value.

                Length and Width

                Cold rolled coils and sheet products: according to EN 10131. Tighter tolerances are available on request.

                Hot rolled coils and sheets with mill edges: SSAB Boron width tolerances are corresponding to -0/+20 mm.

                Hot rolled coils and sheets with cut edges: SSAB Boron width tolerances are corresponding to -0/+2 mm.

                Shape

                Hot rolled strip: according to EN 10051. Narrower tolerances are available on request.

                Flatness

                Hot rolled sheets: SSAB Boron tolerances guarantee a maximum flatness deviation of 6 mm/m in addition to the EN 10051 flatness requirements. Flatness guarantees only apply for cut to length sheets.

                Surface Properties

                Hot rolled strip products: According to EN 10163-2 Class A, Subclass 3.

                Delivery Conditions

                Cold rolled coils and sheets are delivered in annealed condition.

                Hot rolled coils and sheets are delivered in as-rolled or by separate agreement annealed condition.

                Surface Condition

                Cold rolled products are available with oiled or dry surface.

                Hot rolled strip products are available in non-pickled, pickled dry or pickled & oiled condition.

                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.

                Contact Information

                www.ssab.com/contact