| C | Si | Mn | P | S | Cr | Mo | W | V | Co | Ni |
|---|---|---|---|---|---|---|---|---|---|---|
| Max 0,45 | Max 0,40 | Max 0,030 | Max 0,030 | 3,80- 4,50 | 4,70-5,20 | 5,90-6,70 | 1,70-2,10 | - | - |
| Hardness after | Tempering ºC | Symbol | Value |
| Soft annealing | - | HB | ≤269 |
| Quenching with 1210 ºC in oil | - | HRC | 64 |
|
Quenching with 1210 ºC in oil and tempering
(cooling during quenching can be performed gradually in the salt bath at 550 ºC and then cooled in the air) |
560 | HRC | 64 |
| 350 | HRC | 61.5 | |
| 400 | HRC | 62 | |
| 450 | HRC | 63 | |
| 500 | HRC | 64 | |
| 550 | HRC | 65 | |
| 600 | HRC | 63 | |
| 650 | HRC | 57 | |
| 700 | HRC | 47 |
| Property | Unit | Value |
| Density, ρ | g*cm -3 | 8.11 |
| Technological treatment processes | Possible application | Temperature, °C | ||
| Hot forming | Forging | + | 1100-900 | |
| Rolling | + | 1100-900 | ||
| Heat treatment | Soft annealing | + | 790-840 | |
| Stress relieving | + | 600-700 | ||
| Quenching | Heating I | + | ~550 | |
| Heating II | + | 850 | ||
| Austenitising | + | 1190-1230 | ||
| Tempering | + | 550-570 | ||
| Surface treatment | Nitriding | + | 510-530 | |
| Coat application | + | PVD | ||
| ISO | CEN | Russia | |||
| HS6-5-2C | ISO 4957:2004 | HS6-5-2C | ISO 4957:2004 | ~R6M5 | GOST 19265-73 |
| US | Japan | China | |||
| ~M2 | ASTM A 600-92 | ~SKH 51 | JIS G 4403-1983 | ~W6Mo5Cr4V2 | GB 9943-88 |