310 Stainless Steel (UNS S31000) – Composition, Properties, and Uses

310 stainless steel (UNS S31000) is renowned for its exceptional properties and finds its place in a diverse range of industrial applications. In this comprehensive article, we will explore the composition, physical properties, mechanical properties, corrosion resistance, welding characteristics, and uses of 310 stainless steel.

310 Stainless Steel (UNS S31000) – Composition, Properties, and Uses

I. Composition

310 stainless steel is an austenitic chromium-nickel steel that is primarily composed of iron, chromium, and nickel. The alloy typically contains 25% chromium and 20% nickel, which are the key elements responsible for its corrosion resistance and high-temperature strength. Other elements, such as carbon, manganese, silicon, phosphorus, sulfur, and nitrogen, are added in smaller quantities to enhance specific properties or improve processability.

II. Physical Properties

310 ss has a high density, typically ranging from 7.98 to 8.00 g/cm³. It has a moderate coefficient of thermal expansion and high thermal conductivity, which makes it suitable for use in high-temperature environments. The alloy also exhibits good electrical conductivity, making it useful in electrical applications.

III. Mechanical Properties

The mechanical properties of 310 ss are impressive, especially at elevated temperatures. It maintains high tensile strength and yield strength even under severe thermal conditions. However, it should be noted that the alloy’s mechanical properties can vary depending on factors such as heat treatment and processing conditions.

IV. Corrosion Resistance

310 stainless steel’s chromium and nickel content endow it with excellent corrosion resistance, particularly in oxidizing environments. It can withstand corrosion caused by water, steam, and many organic and inorganic chemicals. However, it is less resistant to corrosion in reducing environments, such as those containing sulfuric acid.

V. Welding Characteristics

310 ss can be welded using various welding processes, including fusion welding, resistance welding, and brazing. The alloy’s high thermal conductivity and good weldability make it suitable for complex welding applications. Post-weld heat treatment may be required to maintain the desired mechanical properties and corrosion resistance.

VI. Uses

310 stainless steel’s unique combination of properties makes it ideal for a wide range of industrial applications. It is commonly used in high-temperature environments, such as heat exchangers, furnaces, and boilers, where its resistance to oxidation and scaling is particularly advantageous. The alloy is also used in chemical processing equipment, pollution control devices, and exhaust systems due to its corrosion resistance. Additionally, 310 stainless steel finds applications in the automotive, petroleum, and aerospace industries, where its strength and durability are paramount.

Conclusion

In conclusion, 310 stainless steel (UNS S31000) is a high-performance alloy with exceptional corrosion resistance, mechanical properties, and weldability. Its versatility and reliability have made it a staple in various industries, particularly in high-temperature and corrosive environments. 

Thank you for reading our article and we hope it can help you to have a better understanding of the composition, properties, and uses of 310 stainless steel (UNS S31000). If you are looking for 310 stainless steel (UNS S31000) suppliers online, please don’t hesitate to contact Sino Stainless Steel.

As a leading supplier of stainless steel products in Shanghai, China, Sino Stainless Steel provides customers with high-quality 310 stainless steel, cold-rolled stainless steel sheets, colored stainless steel sheets, stainless steel pipes, stainless steel strips, stainless steel plates, stainless steel bars, and stainless steel tubes at an extremely competitive price.