| standard | Grade | C | Si | Mn | P | S | Cr | Mo | V |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A681 | H13 | 0.32-0.45 | 0.8-1.2 | 0.20-0.50 | 0.03 | 0.03 | 4.75-5.50 | 1.1-1.75 | 0.8-1.2 |
| DIN ISO 4957 | 1.2344 | 0.37-0.42 | 0.9-1.2 | 0.3-0.5 | 0.03 | 0.03 | 4.8-5.5 | 1.2-1.5 | 0.9-1.1 |
| GB/T 1299 | 4Cr5MoSiV1 | 0.32-0.42 | 0.8-1.2 | 0.2-0.5 | 0.03 | 0.03 | 4.75-5.5 | 1.1-1.75 | 0.8-1.2 |
| JIS G4404 | SKD61 | 0.35-0.42 | 0.8-1.2 | 0.25-0.5 | 0.03 | 0.03 | 4.8-5.5 | 1-1.5 | 0.8-1.15 |
| Tempering Tem. ºC | After quenched | 200 | 400 | 500 | 520 | 550 | 580 | 600 | 650 | 700 |
|---|---|---|---|---|---|---|---|---|---|---|
| Hardness HRC | 56 | 54 | 54 | 55.5 | 54 | 52.5 | 49 | 45.5 | 33 | 28 |
| Tensile Strength Mpa | - | - | 2040 | 2100 | 2080 | 1980 | 1780 | 1650 | 1180 | - |
| Reduction of area | - | - | 40 | 34 | 40 | 48 | 53 | 54 | 55 | - |
| Elongation % | - | - | 11 | 11 | 11.5 | 12 | 12.5 | 14 | 18 | - |
| Impact J | - | - | 40 | 32 | 35 | 50 | 60 | 70 | 100 | - |








