هزینه دوام aisi 304
the American Iron and Steel Institute (AISI), those most commonly used in piping systems are the austenitic alloys represented by AISI Types 304, 304L, 316 and 316L. The austenitic Types 309 and 310, containing considerably more chromium and nickel than Types 304 and 316, are also widely used, but for piping exposed to elevated temperatures.