... days after execution of contract(less than 400MT)Specificationscarbon steel ball:1)High hardness(60-65HRC) 2)Supplier of Norilsk ... /lafarge/Codelco. 3)CE,inspectorate,SGS certificates carbon steel ball KaiYuan Co is professional manufacturer which produce high/low/middle ... suppliers in Alibaba. Our enterprise developed fast in recent three years.Nowadays,We have annual production capacity of 65, ...