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A-36

Chemical Requirements

*Elements represented in percentage
Note 1 – Where “-” appears in this table, there is no requirement. The heat analysis for manganese shall be determined and reported as described in the heat analysis section of Specification A6/A6M.

Product PlatesB
Thickness, in. [mm] To ¾ [20], incl Over ¾ to 1½ [20 to 40], incl Over 1½ to 2½ [40 to 65], incl Over 2½ to 4; [65 to 100], incl Over 4 [100]
Carbon, max, % 0.25 0.25 0.26 0.27 0.29
Manganese, % 0.80-1.20 0.80-1.20 0.85-1.20 0.85-1.20
Phosphorus, max, % 0.030 0.030 0.030 0.030 0.030
Sulfur, max, % 0.030 0.030 0.030 0.030 0.030
Silicon, % 0.40 max 0.40 max 0.15-0.40 0.15-0.40 0.15-0.40
Copper, min, % when copper steel is specified 0.20 0.20 0.20 0.20 0.20

Tensile Requirements

Plates, Shapes, and Bars:
    Tensile strength, ksi [MPa] 58-80 [400-550]
    Yield Point, ksi [MPa] 36 [250]
Plates and Bars:
    Elongation in 8 in. [200 mm], min, % 20
    Elongation in 2 in. [50 mm], min, % 23
Shapes:
    Elongation in 8 in. [200 mm], min, % 20
    Elongation in 2 in. [50 mm], min, % 21
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