... (35#,45#,40Cr,35CrMoA,25Cr2Mo1VA etc)2.Size:M16-M643.Length range:40mm-460mm4.Using:petrochemistry,metallurgy,power,pipelineaccessories etc5.Grade:8 ... (35#,45#,40Cr,35CrMoA,25Cr2Mo1VA etc)2.Size:M16-M643.Length range:40mm-460mm4.Using:petrochemistry,metallurgy,power,pipelineaccessories etc5.Grade:8 ...