SSAB Multisteel PA

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    General Product Description

    Normalized pressure vessel steel heavy plate. SSAB Multisteel PA is hot rolled structural steel for general pressure equipment steel constructions. PA = Pressure American (meets the American standard).

    Exceeding the requirements of several standard steel grades, SSAB Multisteel PA is a versatile pressure vessel steel for fabricated pressure equipment made of weldable fine grain steels. Formability and highly consistent quality guarantee fast, uninterrupted production, generating clear savings in the costs of material management. SSAB Multisteel PA exceeds several steel standards and is available as three steel grades: SA/A516 GR 60, SA/A516 GR 65 and SA/A516 GR 70 according to ASME/ASTM SA/A516.

    Grade number (ie. GR 70) refers to min tensile strength. SSAB Multisteel PA is made so that we have adjusted tensile strength window so that min value (485 MPa) comes from GR 70 and max value (550 MPa) comes from GR 60. Min yield strength is according to GR 70 (260 MPa).

    Dimension Range

    SSAB Multisteel PA is available in thickness of 6.00 – 90.00 mm (restricted due to reduction rate).

    Mechanical Properties

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      Thickness
      (mm)
      Yield strength
      (min MPa)
      Tensile strength
      (MPa)
      Elongation A200
      (min %)
      6.00 - 90.00 260 485 - 550 21
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      Comparison

        The mechanical properties are tested transverse to the direction of rolling.

        Impact Properties

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          Thickness
          (mm)
          Min. impact energy for longitudinal testing,
          Charpy V 10x10 mm test specimens
          6.0 - 25.4 20 J / -46 °C
          25.5 - 50.8 20 J / -40 °C
          50.9 - 76.2 20 J / -35 °C
          76.3 - 90.0 20 J / -29 °C
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          Comparison

            Thickness
            (mm)
            6.0 - 25.4
            Min. impact energy for longitudinal testing,
            Charpy V 10x10 mm test specimens
            20 J / -46 °C
            Thickness
            (mm)
            25.5 - 50.8
            Min. impact energy for longitudinal testing,
            Charpy V 10x10 mm test specimens
            20 J / -40 °C
            Thickness
            (mm)
            50.9 - 76.2
            Min. impact energy for longitudinal testing,
            Charpy V 10x10 mm test specimens
            20 J / -35 °C
            Thickness
            (mm)
            76.3 - 90.0
            Min. impact energy for longitudinal testing,
            Charpy V 10x10 mm test specimens
            20 J / -29 °C

            The test is made longitudinally to the rolling direction in accordance to ASME SA20.

            Chemical Composition (ladle analysis)

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              C
              (%)
              Si
              (max %)
              Mn
              (max %)
              P
              (max %)
              S
              (max %)
              Nb
              (max %)
              0.20 - 0.24 0.40 1.20 0.015 0.010 0.02
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              Comparison

                Depending on plate thickness.

                Carbon Equivalent CEV

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                  Thickness (mm) 6.00 - 90.00
                  CEV (max ) 0.43
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                    Thickness (mm)
                    CEV (max )
                    6.00 - 90.00
                    0.43

                    Tolerances

                    Thickness tolerances according to ASME SA20.

                    Flatness tolerance according to ASME SA20.

                    Surface according to EN 10163-2 Class B subclass 3.

                    Delivery Conditions

                    Normalized.

                    Coating

                    Shot blasted & primed surface is available upon request.

                    Certificates

                    SSAB Multisteel PA provides two different certificates:

                    EN 10204-3.1 to SSAB Multisteel PA.

                    SA-20/2017/A20/2015 to SA516GR60/GR65/70MTLTV.

                    Fabrication and Other Recommendations

                    Welding:

                    Weldability is excellent with all welding processes. Increased working temperature requirements are less than those of the corresponding strength grades of standard steels. This means easier welding and cost savings under both workshop and site welding conditions.

                    Needed working temperatures for thick plates please consult SSAB Tech Support.

                    Forming:

                    SSAB Multisteel offers better formability properties than standard steels. Successful forming requires that the manufacturer uses good workshop techniques. Worn tools, poor lubrication, scratches on the surface of the steel as well as edge burrs will all reduce forming quality.

                    Guaranteed minimum bending radius for all directions is 2 x t up to 30 mm thick plate where t = plate thickness.

                    Heat treatment:

                    Recommendations for stress relieving and normalizing.

                    Stress relieving 550 – 600°C (target 580°C)

                    2 minutes/millimeter of thickness, however, 30 minutes minimum. Slow cooling in the furnace.

                    Normalizing 900 – 940°C (target 920°C)

                    1 minute/millimeter of thickness, however, 20 minutes minimum. Cooling in free air.

                    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