440C and General stainless steel widely applies in the ramming bearing,the valve,the seal,bicycle ,motorcycle... 440C and General stainless steel widely applies in the ramming bearing,the valve,the seal,bicycle ,motorcycleAISI 440CSize :1.0-50.8mmGrade:G16-G1000Chemical composition:CSiMnPSCrMoNi0.95-1.20≤1.00≤1.000.040≤0.03016.0-18.0≤0.75≤0.60 1.0-50.8mm Stainless Steel Ball