S31803 is a duplex stainless steel and SS 316 is a standard austenitic stainless steel with different chemical composition and properties.
S31803 is a duplex stainless steel, which means it is a combination of austenitic and ferritic stainless steels. It contains about 22% chromium, 5-6% nickel and 3% molybdenum, along with other elements such as nitrogen and copper. This combination of elements gives S31803 increased strength and corrosion resistance compared to standard austenitic stainless steels such as SS316. S31803 pipe is more suitable for applications that require high strength and good corrosion resistance in harsh environments.
SS 316 is a standard austenitic stainless steel containing approximately 16-18% chromium, 10-14% nickel and 2-3% molybdenum. Known for good corrosion resistance, mechanical properties and high temperature performance. 316 stainless steel pipe is typically used in applications that will be exposed to high temperatures or corrosive environments.
