... Grade:GB 3Cr17NiMo / W-Nr 1.2316 ESR / JIS SUS420J2 ESR / AISI 420J2 ESR / BOHLER M300 / DIN X30WMo17 ... / DAIDO G-STAR Size: Bar, 50-380mm/dia. ;Flat, 30~250*150~610 mm ;Length, 1 ... .5-6m Delivery Conditions:Conventional or ESR, hot rolling or forging, ... 32~36HRC,annealed to HB≤229 General:ESR material, high cleanliness, polishes to mirror effect ...