Cold drawn EN 10277:2018 standard W.NR.: 1.0765 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 % Pb % From 0,32 – 1,30 – 0,10 0,15 To 0,39 0,40 1,70 0,06 0,18 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≤10 500 da 660 a 960 6 >10≤16 440 da 620 a 920 6 >16≤40 219 da 560 a 750 390 da 600 a 900 7 >40≤63 216 da 560 a 740 360 da 580 a 840 8 >63≤100 216 da 550 a 740 340 da 560 a 820 9 * 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 10087 EN 10277-3:08 CF 35 SMnPb 10 35 MF 6 +Pb 36SMnPb14 36SMnPb14 36SMnPb14-EN.pdf (PDF, opens in a new window)