718 mould steel 1.Hot rolled,black, hardened&tempering,Hardness: 28~34HRC 2.100% UL test standards:SEP1921-84,GR.3 CLASS C ... /C Features: 718 MOULD STEEL (P20+Ni/718 /DIN 1.2738) 1).Grade ... +Ni/718 steel plate (3Cr2NiMnMo/ASTM P20+Ni/718/DIN 1.2738) 2).Specification: 20~400*205~2200*3000~5800mm, or ... .28~04, Si=0.2~0.8, Mn=1.0~1.5, Cr=1.7~2.0, Mo=0.25~0.4, Ni ...