... certain standard trademarks stainless resist corrosion, theheat-resisting cast steel. For example 1Cr18Ni91Cr18Ni9Ti1Cr18Ni10Nb1Cr18Ni12Mo21Cr25Ni131Cr20Ni14Si220 etc.2. American steel ... burner nozzle, the circulation fluid bed boiler center tube (returns material), in the wind hat, the ... distributor Coal burner Reducing nozzle tube ash pipe,as guide pipe fire tube(flue duct) for boilergas nozzle ...