ASTM A829 steel grades

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    General Product Description

    The ASTM A829 specification is the Standard Specification for Alloy Structural Steel Plates produced to chemical composition requirements and delivered in the as-rolled (green) condition. Parts produced from the as-rolled (green) plates are typically heat treated to obtained a combination of high strength and toughness.

    Dimension Range

    The following plate sizes are available for A829 steel plates:
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      Grade Product type Thickness
      (inchesmm)
      Width
      (inchesmm)
      Length
      (inchesmm)
      4130 Discrete Plate 0.50 - 3.0013 - 76.2 962400 240 - 10206100 - 25910
      4140 Discrete Plate 0.197 - 6.005.00 - 152 962400 73 - 10201900 - 25910
      8620 Discrete Plate 0.500 - 2.0012.7 - 50.8 962400 240 - 10206100 - 25910
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        Thickness: Inquire for thicknesses <0.500 in. and >3.0 in.

        Width: Inquire for widths <96 in. down to 60 in. and >96 in up to 131.9 in.

        Length: Inquire for lengths <240 in. down to 73 in.

        Mechanical Properties

        A829 steel grades are not routinely tested for mechanical properties. Please inquire if specific mechanical properties in the as-rolled (green) plate are required.

        Chemical Composition

        (heat analysis, wt. %, maximum unless indicated)
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          Grade C
          (wt %)
          Mn
          (wt %)
          P
          (max wt %)
          S
          (max wt %)
          Si
          (wt %)
          Cr
          (%)
          Mo
          (%)
          Ni
          (%)
          4130 0.28 - 0.33 0.40 - 0.60 0.030 0.030 0.15 - 0.35 0.80 - 1.10 0.15 - 0.25
          4140 0.36 - 0.44 0.75 - 1.00 0.030 0.030 0.15 - 0.35 0.80 - 1.10 0.15 - 0.25
          8620 0.18 - 0.23 0.70 - 0.90 0.030 0.030 0.15 - 0.35 0.40 - 0.60 0.15 - 0.25 0.40 - 0.70
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            Inquire for grades in A829 not described in this document.

            Tolerances

            Thickness, width, flatness and length tolerances are in accordance to ASTM A6. Procedures and tolerances for all other testing shall be in accordance with ASTM A6 (and associated ASTM testing standards where applicable), including testing not otherwise described in this document.

            Delivery Conditions

            A829 steel plates produced at SSAB are delivered in the as-rolled (green) condition.

            Fabrication and Other Recommendations

            Please inquire if there are special fabrication requirements for a specific application.

            Thermal Cutting

            A829 steel plates can be thermally cut satisfactorily in the as-rolled (green) condition. The hardened, heat-affected zones adjacent to the cut surfaces should be removed before any subsequent forming or welding operation.

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              Grade Thickness
              (in. [mm])
              Minimum Preheat and Interpass Temperature
              (°F [°C])
              4130 Up to 1.000 300 [150]
              4130 1.000 - 3.000 350 [175]
              4140 Up to 1.000 300 [150]
              4140 1.000 - 3.000 350 [175]
              8620 Up to 1.000 200 [95]
              8620 1.000 - 3.000 300 [150]
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                Weldability

                A829 steel grades are weldable by conventional electric arc welding processes when using low-hydrogen consumables and appropriate welding practices. The electrodes for shielded metal arc welding must be properly stored and dried; the welding flux must be properly dried and free from moisture for submerged arc welding.

                Slow-cooling after welding and a post-weld heat treatment may be required to minimize cold cracking.