... Length:3 or 4 meter or as request SCM440 Forging Shaft SCM440 Steel Grade: AISI1020,AISI1040,AISI1045,AISI1050, CK15,C22,C45 ... Straightness:≤4mm/m(black), ≤2mm/m(turning)OD Tolerance:-0/+8mm(black),-0/+3 mm(turning)Grain Fineness:ASTM E112-96 ... Note:Forged tube, forged square, forged shaft, forged alxs,forged wind turbine main shaft,ship shaft and other finishing service can be supplied ...