... O1,A2,S1,S5,S7,M2,L2,L6DIN 1.2365, 1.2343, 1.2344, 1.2379, 1.2436, 1.2510, and 1.2311DIN 1.2738, 1.2542, 1.3343, 1.2714, 1 ... .1730, ESR1.2083Standard: DIN, JIS ... , flat steel, square steel, die steel, spring steel, carbon tool steel, stainless steel, alloy steel, high speed steel, carbon structural steel, hot- ...