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Material Analysis Comparison of Corrosion Resistance between Various Stainless Steels
Most of the stainless steel materials we contact are: CF8 (304); CF3 (304L); CF8M (316); CF3M (316L). These are just a few of the materials we often use or commonly used. Stainless steel is divided into many types according to different properties. The following is a summary of the corrosion resistance of our company for the characteristics of stainless steel:
301: Stainless steel exhibits a significant work hardening phenomenon when deformed, and is used in various occasions requiring higher strength.
302: Stainless steel is essentially a variant of 304 stainless steel with a higher carbon content, which allows it to achieve higher strength by cold rolling.
302B: It is a kind of stainless steel with high silicon content, which has high resistance to high temperature oxidation.
303 and 303Se: are free-cutting stainless steels containing sulfur and selenium, respectively, for applications where the main requirements are easy cutting and high gloss.
303Se: Stainless steel is also used to make parts that require enthusiasm, because under these conditions, this stainless steel has good hot workability.
304: A versatile stainless steel that is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability).
304L: A variant of 304 stainless steel with a lower carbon content for applications requiring soldering. The lower carbon content minimizes the precipitation of carbides in the heat affected zone near the weld, which may result in intergranular corrosion (weld erosion) in certain environments.
304N: It is a nitrogen-containing stainless steel. Nitrogen is added to increase the strength of the steel.
305 and 384: Stainless steel contains high nickel and has a low work hardening rate, which is suitable for various applications where high cold formability is required.
308: Stainless steel is used to make the electrode.
309, 310, 314 and 330: The nickel and chromium contents of stainless steel are relatively high in order to improve the oxidation resistance and creep strength of steel at high temperatures. The 309S and 310S are variants of the 309 and 310 stainless steels, except for the lower carbon content, in order to minimize the carbides precipitated near the weld. 330 stainless steel has a particularly high resistance to carburizing and thermal shock resistance.
316 and 317: Type stainless steels contain aluminum and are therefore much more resistant to pitting corrosion in marine and chemical industrial environments than 304 stainless steel. Among them, variants of Type 316 stainless steel include low carbon stainless steel 316L, nitrogen-containing high-strength stainless steel 316N, and high-sulfur free-cutting stainless steel 316F.
321, 347 and 348: stainless steel stabilized by titanium, niobium and tantalum, respectively, suitable for welding members used at high temperatures. 348 is a stainless steel suitable for the nuclear power industry, which has certain restrictions on the combination of bismuth and cobalt.
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