Age Hardened Room Temperature Hardness
| Form |
Hardness |
Heat Treatment |
| Sheet |
35 HRC |
2050F, 30 Min, AC + 1650F, 4 Hr, AC |
| Plate |
36 HRC |
2050F, 30 Min, AC + 1650F, 4 Hr, AC |
| Sheet |
42 HRC |
1400F, 16 Hr, AC |
| Plate |
39 HRC |
1400F, 16 Hr, AC |
HRC = Hardness Rockwell "C"