1.7176, DIN 17221 55Cr3, ASTM 5155, 5160, SUP9 steelmax2019-01-06T18:31:25+09:003월 21st, 2018| .7176, DIN 17221 55Cr3, ASTM 5155, 5160, SUP9 DIN-EN 10089 에서는 Quenched and Tempered
