1. Corrosion resistance & High-temperature performance: SS304 contains 18% Cr and 8% Ni, which has good corrosion resistance in ordinary production, while its low tolerance to chloride ions makes it unsuitable for use in environments containing chloride ions. Based on SS304, 2% Mo makes SS316 better anti-corrosion, especially in environments containing chloride ions. It also has higher high-temperature strength and creep resistance for durable usage and can maintain good mechanical properties at high temperatures. Therefore, SS316, in the chemical industry, marine engineering, medical equipment, and other fields.
2. Processing performance: There are also differences in mechanical properties between SS304 and SS316. SS316 has higher tensile strength and resistance, more suitable for withstanding stress in high-pressure and high-temperature environments. While SS304 has better processing performance and welding performance, easier to process and manufacture.
3. Market price: The price of SS316 is relatively higher than SS304.
As mentioned above, stainless steel should be chosen according to different applications. If in seawater, salt corrosion, or a high-temperature environment, SS316 is a better option. If in a general corrosive environment or has higher processing performance and price requirements, SS304 is the one.