| | | Hardened and Tempered |
| | | Q | R |
| Limited Ruling Sections Min. | 150 | 65 | 22 |
| Tensile Strength, Tons/Sq. in Min | 35 | 40 | 45 |
| Yield Stress, Tons/Sq. in. | 18 | 28 | 32 |
| Elongation, percent Min. | 20 | 22 | 20 |
| Izod Im[pact Value, FT. LB. Min. | | 10 | 10 |
| Brinell Hardness Number | 152/207 | 179/229 | 210/255 |
| BS 970 | 080 M 40 |
| SAE (AISI) | 1043 |
| WERKSTOFF NO | 1,0503 |