cold drawn standards EN 10277:2018
W.NR.: 1.7149
Special alloy case-hardening steel
heat analysis according to the EN ISO 683-3:2022 standard
| C % | Si % | Mn % | P % | S % | Cr % | Cu % | |
| DA | 0,17 | – | 1,10 | – | 0,020 | 1,00 | – |
| A | 0,22 | 0,40 | 1,40 | 0,025 | 0,040 | 1,30 | 0,40 |
according to the EN 10277:2018 standard
| Thickness mm | Soft annealed* + peeled rolled (+A +SH ) |
Soft annealed* + cold drawn |
| ( +A+C ) | ||
| Hardness maximum values
HB |
Hardness maximum values
HB |
|
| ≥5≤10 | – | 270 |
| >10≤16 | – | 260 |
| >16≤40 | 217 | 255 |
| >40≤63 | 217 | 250 |
| >63≤100 | 217 | 250 |
* Delivery condition: subjected to a softening treatment according to the maximum hardness prescription.
Weldability:
It is a MnCr alloy steel, easily hot machinable and weldable.
Hardenability:
It has a medium hardenability and therefore it can show good core features till thicknesses of about 40 mm.
Notes:
CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication):
| UNI 7846 | EN 10084 | DIN 17210 | EN 10277-4:08 | AFNOR 35-551 |
| 20MnCr5 | 20MnCrS5 | 20MnCrS5 | 20MnCrS5 | 20MC5 |