... 720-750mm Mainly used to found ingredient of material, cutter and heads, Tungsten Rod W-1(W≥99.98%),Purity: ... ingredient of material, cutter and heads, conductor of heat,as the material and additive, crankshaft and cylinder barrel of advanced automobile ... kinds of heat-resistent steel and electrode, mainly used to guns, artillery,rockets, satellite,airplane and shipChemical Composition (%)Main Comp.W ...