1.)Chemical Composition: C:0.95-1.05;Si:0.15-0.35;Cr:1.40-1.65;Mn:0.25-0.45;S:≤0.025;P:≤0.025;Ni:allow residual content of ≤0.30;Cu:allow residual content of ≤0.25;Mo:allow residual content of ≤0.08

2.)Features: excellent comprehensive performance,high and evenly hardness,good wear resistance,high strength of contact fatigue;excellent cutting and processability 

3.) Functions:suitable for making all kinds bear ferrules of the wall thickness ≤12mm and outside diameter≤250mm,steel ball of the diameter ≤50mm,taper,spherical roller of the diameter ≤22mm and all sizes of runner axles;also can be used for manufacturing measuring implements,moulds and woodworking tool