... -4inch), also according to customers' reqquirements. 4.Material: super duplex stainless steel, incoloy, incolonel, hastelloy, monel, nimonic etc. 5. Grade: ... 4-10, A2, A4, A2-70, A4-80. 6. Hardness limit: 100HV~370 HV 7ISO 9001 ... NFE,JIS,and according to customers' requirements.3.MaterialCarbon steel,45#,65Mn,stainless steel,brass4.FinishPlain;black; zinc plated(Cr,3+);zinc ...