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Introduction
310S stainless steel
310S stainless steel is a high alloy austenitic stainless steel, which is suitable for high temperature applications. The high Cr and Ni content gives 310S steel excellent oxidation resistance and high temperature strength. The steel also has good ductility and good weldability, making it widely used in many applications.
310S steel is widely used in all high temperature environments where scaling and corrosion resistance as well as high high temperature resistance and good creep resistance are required.
316L stainless steel
316L stainless steel, sometimes called A4 stainless steel or marine grade stainless steel, is the second common austenitic stainless steel after 304/A2 stainless steel. 316L stainless steel is a low carbon version of 316 stainless steel, has better corrosion resistance. After cold processing, 316 steel can have high yield strength and tensile strength, just like duplex stainless steels.
Chemical component
310S stainless steel has excellent high temperature resistance, it can be used in an environment of up to 1200℃, and continuous working temperature can reach to 1150℃. Due to its high Cr and high Ni content, 310S also has good oxidation resistance, corrosion resistance and acid&alkali resistance, suitable for the manufacture of high-temperature resistance components such as electric furnace tubes. In addition, 310S steel has high creep strength and can work constantly under high temperature, is an ideal material for manufacturing high temperature stove, heat treatment equipment and chemical reaction vessels.
The main alloy composition of 316L stainless steel is Cr(16-18%), Ni(10-12%), Mo(2-3%), Mn 2%, and a little amount of Si, P and S(<1%). Adding Mo can enhance the corrosion resistance of 316L steel compared to 304, making it more resistant to localized corrosion from chlorides and general corrosion from reducing acids like sulfuric acid. Adding S element improves the machinability and workability of stainless steel.
310S
| C | Si | Mn | P | S | Cr | Ni |
| ≤0.08 | ≤1.50 | ≤2.00 | ≤0.045 | ≤0.030 | 24.00-26.00 | 19.00-22.00 |
P20
| C | Si | Mn | P | S | Cr | Ni | Mo |
| ≤0.03 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 |
Comparison of 310S steel and 316L steel
310S stainless steel
Component: Cr: 24%-26%, Ni: 19%-22%, C: ≤0.08%.
Characteristics: Has excellent high-temperature performance, can operate at temperatures up to 1200°C, especially performing well in environments above 800°C. It has high creep strength and can work constantly at high temperatures.
Applications: Commonly used in manufacturing high-temperature furnaces, heat treatment equipment, chemical reaction vessels, automotive exhaust systems and components, aerospace components, food processing equipment, and kitchen equipment.
316L stainless steel
Components: Cr: 16%-18%, Ni: 10%-14%, Mo: 2%-3%, C: ≤0.03%.
Characteristics: The addition of Mo element enhances its corrosion resistance against salts, various inorganic and organic acids, bases, and salts, particularly excelling in chloride environments. 316L also has good high-temperature resistance performance, with intermittent use temperatures reaching 870℃and continuous use up to 925℃.
Applications: Widely used in chemical industry, food processing, paper manufacturing, pharmaceutical equipment, marine environments, and watchmaking. Particularly suitable for seawater and other chloride environments, this kind of material is often used to manufacturing welded components, such as heat exchange parts for pulp and paper equipment, dyeing equipment, film processing equipment, piping, external materials for coastal buildings, and premium watch bands and cases.
Overall, 310S steel is more focuses on high-temperature resistance performance, while 316L steel is more focuses on corrosion resistance, especially in chloride environments. Choose suitable stainless steel according to different application requirements and environment condition, to ensure the best performance and life span.
FAQ
What are 310S and 316L?
Both 310S and 316L steel are austenitic stainless steels with excellent corrosion resistance and high temperature resistance properties, suitable for high-temperature and corrosion environments.
Where is 310S steel used?
310S steel is mainly used in high-temperature and corrosion environments, such as chemical industry, petroleum, metallurgy, nuclear industries, automotive manufacturing, aerospace, and food processing.
Is 316L stainless steel food-grade stainless?
Yes, 316L stainless steel is considered as food-grade stainless steel, is widely used in manufacturing food processing equipment and beverage production due to its excellent corrosion resistance, low-temperature toughness and non-magnetic properties. With Mo element in 316L stainless steel, enhances its corrosion resistance against salts, various inorganic and organic acids, bases, and salts, particularly excelling in chloride environments. In addition, the low carbon content of 316L stainless steel makes it maintain good corrosion resistance property after welded, is suitable for manufacturing the equipment and parts which require food-grade materials.
