Bearing Steel EN31 Features: Steel grade: Bearing Steel(GCr15 /SAE52100/EN31) 1)Delivery condition: Hot-rolled, black surface, spheroidized annealed,Hardness: ≤220HB 2)Chemical composition(%): C=0.96~1.05,Si=0.15~0.35,Mn=0.25~0.45;Cr=1.40-1.65, P:≤0.025,S:≤ 0.025,NI:≤0.22,Cu:≤0.20,Mo≤0.08 3)Specification:Diameter:20~650mm. Length:2000~5800mm, or as customer' request 4)Payment terms:30% deposit,balance against L/C at sight or T/T 5)Packing:Raw or As customers' requirement