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 |
