Piping alloy steel 37Mn steel piping Piping alloy steel 37Mn steel pipingOD10-1170mmWT2-135mmStandardGB,JIS,DIN,AISIGradeCr-Mo alloy/ Mn ... 42CrMo,40CrMnMo,Cr9Mo,J55,K55,L80,N80, 40Cr,27SiMn,30Mn,Q345B,Q345C,16Mn,16Cr,20Cr,and so onSurfaceBare, varnish, black ... of ChinaTerms of shipment15-20days after receiving the advanced paymentPackaging6 steel strip ,bundles ,caps ,plastic wrap ,in bulk,seeworthy ...