... to client request ASTM 4130,4320,4140,4340,8620Alloy Steel Round Bars! Standards:ASTM,EN(DIN,BS,NF),GB,JIS. ... Detailed Product Description Company Main Products: 1.Alloy Steel Round bars: USA1330,1340,1345,4028,4032,4042,4118,4120,4121 ... ,20Mn,15Cr,30Cr,40Cr,45Cr,35CrMo,42CrMo,38CrMoAl,50CrVA,40CrNiMoA,20CrNiMoA2,stainless steel round bars: USAJapenJISGermany British FranceEN(DIN BS NF ...