2020년 11월 10일Categories AISI-SAE 국제.국가.단체표준4340 HT, SAE 4340, Heat Treated, NiCrMo4340 HT, SAE 4340, Heat Treated, NiCrMo STEELMAX Steel Story 4340 HT 강재는 Nickel, Chromium, Molybdenum 저합금강 (low-alloyed)으로 Heat Treated (quenched and tempered) […]