EN 10277:2018 standard W.NR.: 1.0503 Non-alloy high-grade steel CHEMICAL COMPOSITION MECHANICAL FEATURES PROPERTIES Heat analysis according to the EN ISO 683-1:2018 standard C % Si % Mn % P % S % Cr % Ni % Mo % Cu % Cr+Mo+Ni % From 0,42 0,10 0,50 – – – – – – – To 0,50 0,40 0,80 0,045 0,045 0,40 0,40 0,10 0,30 0,63 According to the EN 10277:2018 standard Thickness mm Rolled + peeled rolled ( +SH ) Cold drawn ( +C ) hardness HB Rm (MPa) Rp0,2 minimum Rm (MPa) A5 % (MPa) minimum ≥5≤10 565 da 750 a 1050 5 >10≤16 500 da 710 a 1030 6 >16≤40 da 172 a 241 da 580 a 820 410 da 650 a 1000 7 >40≤63 da 172 a 241 da 580 a 820 360 da 630 a 900 8 >63≤100 da 172 a 241 da 580 a 820 310 da 580 a 850 8 * Delivery condition: as rolled. Improved machinability: In order to improve its machinability, this steel grade can be supplied upon request with Pb (lead) addition, for example Pb=0,15%÷0,35% Weldability: Due to the medium-high carbon content it can be welded with some precautions. Hardenability: It has a low hardenability in water or oil; fit for surface hardening that gives this steel grade a high hardness of the hardened shell. Notes: CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication): UNI 7845 DIN 17200 AISI-SAE AFNOR 35-552 C45 C45 1045 AF65C45 C45-EN.pdf (PDF, opens in a new window)