Cold drawn standards EN 10277:2018 W.NR.: 1.7149 Special alloy case-hardening steel CHEMICAL COMPOSITION MECHANICAL FEATURES PROPERTIES Heat analysis according to the EN ISO 683-3:2022 standard C % Si % Mn % P % S % Cr % Cu % DA 0,17 – 1,10 – 0,020 1,00 – A 0,22 0,40 1,40 0,025 0,040 1,30 0,40 According to the EN 10277:2018 standard Thickness mm Soft annealed* + peeled rolled (+A +SH ) Soft annealed* + cold drawn ( +A+C ) Hardness maximum values HB Hardness maximum values HB ≥5≤10 – 270 >10≤16 – 260 >16≤40 217 255 >40≤63 217 250 >63≤100 217 250 * Delivery condition: subjected to a softening treatment according to the maximum hardness prescription. Weldability: It is a MnCr alloy steel, easily hot machinable and weldable. Hardenability: It has a medium hardenability and therefore it can show good core features till thicknesses of about 40 mm. Notes: CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication): UNI 7846 EN 10084 DIN 17210 EN 10277-4:08 AFNOR 35-551 20MnCr5 20MnCrS5 20MnCrS5 20MnCrS5 20MC5 20MnCrS5-EN.pdf (PDF, opens in a new window)