... the alloy steel pipes have the highest price and the reasonable prices. welcome to our company Name: alloy steel pipeSpecifications: 1/2"-----72" (seamless : ... hot-water heating, war industry, fire control and environment protection, etc Note:Carbon steel: 10#,20#,A3, 20G.16Mn,ASTM A234, ... 16MnR,Cr5Mo,12Cr1SMoVK,10CrMo910,15CrMo,12Cr2Mo1,A335P22,St45.8,A10bB pipe,alloy steel pipe,seamless steel pipe