What are the difference between 309s stainless steel pipe and 310s stainless steel pipe?

The Chinese steel grade corresponding to 309S is 0Cr23Ni13 grade, and the American standard S30908 (American AISI, ASTM) features and uses: corrosion resistance and heat resistance are better than 0Cr19Ni9.

309S steel is a variant of 309 stainless steel with lower carbon content and is used where welding is required. The low carbon content reduces the precipitation of carbides in the heat-affected zone near the weld to very little, and the precipitation of carbides may cause stainless steel to produce intergranular corrosion (welding erosion) in certain environments.

309s stainless steel pipe characteristics

It can withstand repeated heating below 980 ℃, and has high high temperature strength, oxidation resistance and carburization resistance.

309S stainless steel pipe use

It is widely used in important fields such as boilers, energy sources (nuclear power, thermal power, fuel cells), industrial furnaces, incinerators, heating furnaces, chemical and petrochemical industries.

310S stainless steel pipe is a hollow long round steel, which is widely used in petroleum, chemical, medical, food, light industry, mechanical instruments, etc. When the bending and torsion strength are the same, the weight is lighter, and it is widely used in the manufacture of mechanical parts and engineering structures. Also often used as conventional weapons, barrels, shells, etc.

310S steel is austenitic chromium-nickel stainless steel with good oxidation resistance and corrosion resistance. Because of the higher percentage of chromium and nickel, 310s has much better creep strength. It can work continuously under high temperature and has good high temperature resistance.