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A540 B23
1.6562
4340
40CrMo8-4
40NiCrMo8 4
40NiCrMo7
4337
E4340
Base Element Fe(Iron)
| Element | Amount | (Max/Min) |
|---|---|---|
| C (Carbon) | 0.37% | 0.44% |
| Cr (Chromium) | 0.65% | 0.95% |
| Mn(Manganese) | 0.6% | 0.95% |
| Mo (Molybdenum) | 0.2% | 0.30% |
| Ni(Nickel) | 1.55% | 2% |
| P (Phosphorus) | 0.025% | |
| S (Sulphur) | 0.025% | |
| Si (Silicon) | 0.15% | 0.35% |
| Mechanical Properties | Min | Max |
|---|---|---|
| Ultimate Tensile Strength (UTS) | 827 MPa | |
| 0.2% Proof Stress | 724 MPa | |
| Elongation | 15% | |
| Gauge Length | A50mm | |
| Hardness (Brinell) | 248 HB | 311 HB |
Uses
