Alloy steel with chrome molybdenum vanadium, generally used for boilers; steel resistant to high temperatures up to 540°C, generally used for plugs, gears, bushings, valves.
Standard Reference: EN 10085: 2001
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
| EN 10085: 2001 | (UNI 8077-80) | (DIN 17200-86) | (NF A 35-552-86) | (BS 970 pt.3-96) | ASTM A 29 | ||
| Grade | N° | Werkstoff | N° | ||||
| 31CrMoV9 | 1.8519 | 30CrMoV10 | - | - | - | - | - |
| C | Si/max | Mn | P/max | S/max | Cr | Mo | V |
|---|---|---|---|---|---|---|---|
| 0,27÷0,34 | 0,40 | 0,40÷0,70 | 0,025 | 0,035 | 2,30÷2,70 | 0,15÷0,25 | 0,10÷0,20 |
| Size (mm) |
Treated to improve shearability (+S) |
Soft annealing (+A) |
Quenched and tempered (+QT) |
||||
|---|---|---|---|---|---|---|---|
| HB max to condition | Rp0,2 (MPa) min |
Rm (MPa) min |
A5 (%) min |
Z (%) min |
KV (J) min |
||
| d≤16 | - | 248 | - | - | - | - | - |
| 16<d≤40 | - | 248 | 900 | 1100÷1300 | 9 | - | 25 |
| 40<d≤100 | - | 248 | 800 | 1000÷1200 | 10 | - | 30 |
| Operation | °C |
|---|---|
| Hot forgings deformation | 850÷1150 |
| Nitriding | 480÷570 |
| Soft annealing | 680÷720 |
| Quenching in water or oil | 870÷930 |
| Tempering | 580÷700 |
