... US Standard:AISI1020,AISI1040,AISI1045,AISI1050;Europe Standard:CK15,C.22,C45,CK45,C60,CK60;C45E; Tool Steel:1 ... .Ultra-sonic test: as per SEP 1921 Group III C/c,D/d,E/e,As forged condition straightness: ≤4mm/m, ... /QT conditionNon-metal inclusion: as per ASTM E45 A/B/C/D heavy ≤2, thin ≤2.5 NameRound bar BrandTISCO, ... toleramce: Hot-rolled steel round or square bar: d/a(mm)5.5-77-2020-3030-5050-8080- ...