The difference between 304, 316L, and duplex stainless steel pipe fittings

Two-way stainless steel pipe fittings have the performance characteristics of 304 and austenitic stainless steel pipe fittings products. Comparing duplex stainless steel pipe fittings with 304 and 316L stainless steel pipe fittings as the main material, the following differences are drawn:

A. Duplex stainless steel pipe fittings have excellent resistance to stress corrosion cracking, especially in environments containing chloride ions, even duplex stainless steel pipes containing alloys have higher resistance to stress corrosion cracking than austenitic stainless steel pipes Capability, stress corrosion is a prominent problem that is difficult to solve for ordinary austenitic stainless steel pipes;

B. The corrosion resistance of the most commonly used duplex stainless steel pipe fittings in many media is better than that of ordinary 316L austenitic stainless steel pipes, and super duplex stainless steel pipes have extremely high corrosion resistance. Some media, such as acetic acid, formic acid, etc. can even replace high-alloy austenitic stainless steel pipes and even corrosion-resistant alloys;

C. It has good local corrosion resistance. Compared with austenitic stainless steel pipes with equivalent alloy content, given the high strength and good corrosion resistance of duplex stainless steel pipes, its wear resistance and corrosion fatigue performance are better than 304 stainless steel pipe fittings.