4 Inch ASME B16.9 A815 90 Deg Stainless Steel Elbow

　　The difference between stainless steel elbows and carbon steel elbows is the material is different. the chemical composition of the stainless  steel elbows will keep the elbows for a long time without going into rust, will not be corroded. Usually it is produced on a high proportion of Cr, Ni and other alloys. The proportion is up to 20%. Common stainless steel is 304,304L, 321,316/316L, 1Cr18Ni9Ti, 0Cr18Ni9, before several numbers indicate the steel of the U. S.  the last one (1Cr18Ni9Ti) representation for domestic China stainless steel.