ASTM A830 steel grades

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    General Product Description

    The ASTM A830 specification is the Standard Specification for Plates, Carbon Steel, Structural Quality, Furnished to Chemical Composition Requirements and supplied in the as-rolled (green) condition. Typically, the as-rolled plates undergo subsequent processing to produce the desired material properties. Low carbon grades (e.g. 1008) are used in applications where formability is important. Medium carbon grades (e.g. 1020) are used in applications where a combination of machinability and formability are needed. High carbon grades (e.g. 1030 & 1045) are used when hardenability is important for subsequent heat treating.

    Dimension Range

    The following product sizes are available for A830 steel grades:
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      Grade Product type Thickness
      (inchesmm)
      Width
      (inchesmm)
      Length
      (inchesmm)
      1008 Discrete Plate 0.188 - 0.2494.78 - 6.32 72 - 961800 - 2400 240 - 10206100 - 25910
      1008 Discrete Plate 0.250 - 3.006.35 - 76.2 72 - 1201800 - 3050 240 - 10206100 - 25910
      1008 Coils 0.188 - 0.7504.78 - 19.0 72 - 961800 - 2400
      1020 Discrete Plate 0.188 - 0.2494.78 - 6.32 72 - 961800 - 2400 240 - 10206100 - 25910
      1020 Discrete Plate 0.197 - 6.105.00 - 155 60 - 131.91500 - 3350 73 - 10201900 - 25910
      1020 Coils 0.188 - 0.7504.78 - 19.0 72 - 961800 - 2400
      1030 Discrete Plate 0.250 - 2.5006.35 - 63.50 72 - 1031800 - 2620 240 - 10206100 - 25910
      1030 Coils 0.188 - 0.5004.78 - 12.7 72 - 961800 - 2400
      1045 Discrete Plate 0.236 - 5.105.99 - 130 60 - 131.91500 - 3350 73 - 10201900 - 25910
      1045 Coils 0.188 - 0.5004.78 - 12.7 72 - 961800 - 2400
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        Thickness: Inquire for thicknesses <0.250 in. and >3.0 in.

        Width: Inquire for widths <72 in and >120 in.

        Length: Inquire for lengths <240 in.

        Mechanical Properties

        A830 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 %)
          1008 0.10 0.50 0.030 0.030 0.40
          1020 0.18 - 0.23 0.30 - 0.60 0.030 0.030 0.40
          1030 0.28 - 0.34 0.60 - 0.90 0.030 0.030 0.40
          1045 0.43 - 0.50 0.60 - 0.90 0.30 0.30 0.15 - 0.40
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            Inquire for grades in A830 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

            A830 steel plates/coils produced at SSAB is delivered in the as-rolled (green) condition.

            Fabrication and Other Recommendations

            Inquire if there are special formability requirements for an application.

            Thermal Cutting

            A830 steel plate 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. Recommended preheating for thermal cutting is indicated in the table below.

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              Grade < 1.00 in Thickness
              (°F [°C])
              1.00 – 3.00 in Thickness
              (°F [°C])
              1008 ≥50 [≥10] ≥50 [≥10]
              1020 ≥50 [≥10] 200 [95]
              1030 200 [95] 300 [150]
              1045 300 [150] 350 [175]
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                Weldability

                A830 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.