... , industries such as gas burning,urban constructions, hot-water heating, war industry, fire control and environment protection, etc Note:Carbon steel ... ,316LAlloysteel:16MnR,Cr5Mo,12Cr1SMoVK,10CrMo910,15CrMo,12Cr2Mo1,A335P22,St45.8 cap,stainless steel cap,pipe fitting