High standard special material Hastelloy butterfly valve High standard special material Hastelloy butterfly valve, shown in the figure above is flange type, pn25-dn 150 & 250 Hastelloy butterfly valveValve, Hastelloy, just like stainless steel, there are many materials under it, hc276 is more common, and it is also used more frequently Many.The main chemical composition and mechanical properties of Hastelloy C276 are as follows Chemical composition:C :≤0.12Mn:≤1.00P :≤0.04S :≤0.03Si :≤1.00Cr: