1,ccemented carbide precise instruments 2.Grade: K10,K20,K40 ... ≥1860Fine grain alloy, good wear resistance, Suitable for semifinishing of chilled cast iron, non-ferrous metal ... resistance and cutting speed comparatively lower. Suitable for processing of casting iron, non-ferrous metal ... resistance, high anti-bending strength, used for steel alloy etc. customize ccemented carbide precise instruments