EN 10277:2018 standard
W.NR.: 1.1186
Non-alloy special steel
heat analysis according to the EN ISO 683-1:2018 standard
| C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | Cu % | Cr+Mo+Ni % | |
| From | 0,37 | 0,10 | 0,50 | – | – | – | – | – | – | – |
| To | 0,44 | 0,40 | 0,80 | 0,025 | 0,035 | 0,40 | 0,40 | 0,10 | 0,30 | 0,63 |
according to the EN 10277:2018 standard
| Thickness mm |
Rolled + peeled rolled ( +SH ) |
Cold drawn ( +C ) |
|||
| hardness HB | Rm (MPa) | Rp0,2 minimum | Rm (MPa) | A5 % | |
| (MPa) | minimum | ||||
| ≥5≤10 | 540 | da 700 a 1000 | 6 | ||
| >10≤16 | 460 | da 650 a 980 | 7 | ||
| >16≤40 | da 164 a 207 | da 550 a 710 | 365 | da 620 a 920 | 8 |
| >40≤63 | da 164 a 207 | da 550 a 710 | 330 | da 590 a 840 | 9 |
| >63≤100 | da 164 a 207 | da 550 a 710 | 290 | da 550 a 820 | 9 |
* Delivery condition: as rolled.
Weldability:
Due to the medium-high carbon content it can be welded with some precautions.
Hardenability:
Low hardenability; it shows intermediate features between those of steels with medium and those of steels with high carbon content; therefore it is not easy to obtain the required features by quenching in oil and the quenching in water can result in cracking.
Notes:
CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication):
| UNI 7845 | DIN 17200 | AISI-SAE | AFNOR 35-552 |
| C40 | Ck40 | 1040 | XC42H1 |