Cold drawn EN 10277:2018 standard W.NR.: 1.0727 High machinability steel for direct hardening CHEMICAL COMPOSITION MECHANICAL FEATURES PROPERTIES Heat analysis according to the EN ISO683-4:2018 standard C % Si % Mn % P % S % From 0,42 – 0,70 – 0,15 To 0,50 0,40 1,10 0,06 0,25 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≤10 570 da 740 a 980 5 >10≤16 470 da 690 a 930 6 >16≤40 222 da 590 a 760 400 da 640 a 880 7 >40≤63 213 da 580 a 730 380 da 610 a 850 8 >63≤100 207 da 560 a 710 340 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): EN 10277-3:08 DIN 1651 EN 10087 46S20 45S20 45S20 46S20-EN.pdf (PDF, opens in a new window)