Reasons for cracking of stainless steel reducers in a short time

　　Stainless Steel Reducers is a kind of universal stainless steel material. Its rust-proof performance is better than 200 series stainless steel material. High temperature resistance is also better, the general use temperature limit is less than 650 C. 304 stainless steel has excellent corrosion resistance and intergranular corrosion resistance. For oxidizing acid, it is found that 304 stainless steel has strong corrosion resistance in nitric acid with concentration less than 65% below boiling temperature. ASME B16.5 2Inch Stainless Steel Pipe Fitting Reducer also has good corrosion resistance to alkali solution and most organic and inorganic acids.

　　The causes of cracking of Stainless Steel Reducers made of 304 stainless steel in a short time were analyzed and studied. The crack and fracture morphology of the failure parts were characterized by metallographic microscope and scanning electron microscope, and the chemical composition of base metal, weld, heat affected zone and corrosion products were analyzed by EDS. The results show that the leakage of pipeline is caused by the sensitization treatment during welding, and the intergranular stress corrosion cracking occurs rapidly under the dual action of chloride and sulfide solution.