内六角电动批头 52 ALLOY STEEL ISA KND OF STEEL WHICH IS BASED ON CARBON TOOL STEEL AND ADDED WITH CHROMIUM. MOLYBDENUM,TUNGSTEN,VANADHUM AND OTHER ALLOY ELEMENTS TO IMPROVE HARDENABILITY. TOUGHNESS,WEAR RESISTANCE AND HEAT RESISTANCE.IT IS MAINLY USED FOR MANUF S2合金钢锻造 高扭力 内六角 √ 高硬度 防锈耐磨 √ 强磁性