... ,NF 2)4140,5140,5145,5150,4130,4137,8620,8615 Forged/ hot rolled alloy steel bar 41401)Standard: ASTM,JIS,DIN,BS,AISI2)Grade ... : black/peeled/grinded, UT tested5)Delivery condition:EAF + LF + VD, hot rolled/forged/ Heat Treatment(optional), Forged/ hot rolled alloy steel bar 4140