Cold drawn EN 10277:2018 standard W.NR.: 1.0760 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 0,35 – 1,20 – 0,24 To 0,40 0,40 1,50 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≤10 550 da 700 a 960 6 >10≤16 500 da 660 a 930 6 >16≤40 213 da 560 a 730 420 da 610 a 900 7 >40≤63 213 da 560 a 730 400 da 600 a 840 7 >63≤100 204 da 550 a 700 350 da 580 a 820 8 * 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 / / 38SMn28 38SMn28 38SMn28-EN.pdf (PDF, opens in a new window)