Cold drawn standards EN 10277:2018 W.NR.: 1.7147 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 % FROM 0,17 – 1,10 – – 1,00 – TO 0,22 0,40 1,40 0,025 0,035 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 HB Maximum values Hardness HB Maximum values ≥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 required hardness. Weldability: It is a MnCr-alloy steel, easily hot machinable and weldable. Hardenability: It has got a quite good hardenability and therefore it can show good core properties till a thickness of about 40 mm. Notes: Correspondence with other standards ( purely as an indication ): UNI 7846 EN 10084 DIN 17210 EN 10084:2008 AFNOR 35-551 20MnCr5 20MnCr5 20MnCr5 20MnCr5 20MC5 20MnCr5-EN.pdf (PDF, opens in a new window)