AISI 420 stainless steel 1.1.2316 2.Corrosion-resisting mirror surface ... .High-grade mirror mould DIN 1.2316/S136/3Cr17NiMo AISI 420 stainless steel1) Chemical composition: C=0.34~0.42, Si ... :30% deposit ,balance against LC at sight or TT AISI 420 stainless steel