Cold drawn EN 10277:2018 standard
W.NR.: 1.0718
High machinability steel not destined to heat treatment
heat analysis according to the EN ISO 683-4:2018 standard
| C % | Si % | Mn % | P % | S % | Pb % | |
| From | – | – | 0,90 | – | 0,27 | 0,20 |
| To | 0,14 | 0,05 | 1,30 | 0,11 | 0,33 | 0,35 |
according to the EN 10277:2018 standard
| Thickness mm |
Rolled + peeled rolled ( +SH ) |
Cold drawn ( +C ) |
|||
| hardness HB max | Rm (MPa) | Rp0,2 minimum | Rm (MPa) | A5 % | |
| (MPa) | minimum | ||||
| ≥5≤10 | 440 | da 510 a 810 | 6 | ||
| >10≤16 | 410 | da 490 a 760 | 7 | ||
| >16≤40 | 169 | da 380 a 570 | 375 | da 460 a 710 | 8 |
| >40≤63 | 169 | da 370 a 570 | 305 | da 400 a 650 | 9 |
| >63≤100 | 154 | da 360 a 520 | 245 | da 360 a 630 | 9 |
* Delivery condition: as rolled.
Machinability:
This steel grade is marked by a good machinability on machine tools and by an easy fragmentation of chips.
In order to further improve its machinability, this steel grade can be supplied upon request with Te (tellurium) and Bi (bismuth) addition.
Weldability:
Due to the high sulphur and phophorus content free-cutting steels not destined to heat treatment are not generally recommended for welding.
Notes:
CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication):
| UNI 4838 | DIN 1651 | AFNOR 35-561 | EN 10277-3:08 | EN 10087 |
| CF 9 SMnPb 28 | 9SMnPb28 | S 250 Pb | 11SMnPb30 | 11SMnPb30 |