Кованые Круглый прокат SNCM220 / SAE8620

Hot forged round bars Specification; SNCM220/SAE8620 Delivery condition; Forged+Annealed+Rough Turned+Q/T Reference standards ;JIS G4052,ASTM E45, EN10228-3:1998(Sep1921-84),ASTM E 112,EN10204 Melting process; EAF+LF+VD+Ingot casting(bottom poured) Chemical compostion; C:0.17-0.23; Mn:0.60-0.90;Si:0.15-0.35;Cr:0.40-0.65;Mo:0.15-0.30; Ni:0.40-0.70;S/P<=0.030; Forging reduction ratio;≥3.0:1,aim for 4:1 grain size;better than 5 As per ASTM E112-96. Ultra-sonic test;SEP 1921 Group 3 Class C/c or D/d,or E/e; Length range;4 meter and up or fix length; Dia. tolerance ;-0/+3mm.straightness: max. 2mm/m. Other steel grade; S45C/C45/CK45/SAE1045,C60,S55C,S20C,A350 LF2,ASTM A105,S355J2G3, 16MnCr5,20MnCr5,34CrNiMo6,SAE4340,SAE4130,42CrMo4,SAE4140,SCM440, SNCM420,25CrMo4,21CrMoV511,56NiCrMo7,SNCM439,17CrNiMo6,30NiCrMo8, 18NiCrMo5 and others;