31CrMoV9 – Nr.1.8519
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
References and Comparable Standards
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 |
- |
- |
- |
- |
- |
Chemical Composition (Cast Analysis) (%)
| 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 |
Mechanical Properties
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 |
Working Temperatures Recommended
| Operation |
°C |
| Hot forgings deformation |
850÷1150 |
| Nitriding |
480÷570 |
| Soft annealing |
680÷720 |
| Quenching in water or oil |
870÷930 |
| Tempering |
580÷700 |
