Cold drawn EN 10277:2018 standard W.NR.: 1.0762 High machinability steel for direct hardening CHEMICAL COMPOSITION MECHANICAL FEATURES PROPERTIES Heat analysis according to the EN ISO 683-4:2018 standard C % Si % Mn % P % S % From 0,40 – 1,30 – 0,24 To 0,48 0,40 1,70 0,06 0,33 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≤10 600 da 760 a 1030 5 >10≤16 530 da 710 a 980 5 >16≤40 241 da 630 a 820 460 da 660 a 900 6 >40≤63 231 da 620 a 790 430 da 650 a 870 7 >63≤100 228 da 610 a 780 390 da 630 a 840 7 * Delivery condition: as rolled. Machinability: This steel grade generally shows a quite good machinability on machine tools; machinability decreases with the increase of carbon, silicon and manganese content. Weldability: Due to the high sulphur and phophorus content free-cutting steels for direct hardening are not recommended for welding. Notes: CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication): UNI 4838 AFNOR 35-562 EN 10277-3:08 EN 10087 CF 44 SMn 28 45 MF 6.3 44SMn28 44SMn28 44SMn28-EN.pdf (PDF, opens in a new window)