... the certification of ISO9001:2000HRCA)High chromium steel ball(60-64)B)Medium chromium steel ball(50-60)C)Low ... steel ball C 1.8-3.3, Si 0.3-1.2, Mn 1.5-2.0, Cr 10-16, P 0 ... )Medium chromium steel ball C 2.0-3.3, Si 0.3-1.2, Mn 1.5-2.0, Cr 4-9, ... Max, S 0.1MaxC)Low chromium steel ball C 2.2-3.5, Si 0.3-1.0, Mn 0.5-1. ... one MOQ2 TonSPayment terms 1)100% T/T in advance 2)30%T/T in advance +70% irrevocable L/C ...