Corrosion resistance of all kinds of stainless steel
304: it is a versatile stainless steel which is widely used in the production of equipment and parts requiring good comprehensive performance (corrosion resistance and molding).
301: The stainless steel presents an obvious process hardening phenomenon during deformation and is used for various occasions requiring high intensity.
302: stainless steel is essentially a variant of 304 stainless steel with a higher carbon content, which can be obtained by cold rolling.
302B: it is a kind of stainless steel with high silicon content. It has high resistance to high temperature oxidation.
303 and 303Se: it is an easy cutting stainless steel with sulfur and selenium respectively, which is used for the occasions where the main requirements are easy to cut and watch and high brightness. 303Se stainless steel is also used for making machine parts requiring hot heading, because under these conditions, the stainless steel has good thermal processing.
304L: a variant of 304 stainless steel with a low carbon content, used for welding situations. Low carbon content is made in the heat affected zone near the weld in the precipitation of carbide to a minimum, and may result in precipitation of carbide stainless steel intergranular corrosion in some environments (welding erosion).
04N: it is a nitrogen-containing stainless steel, with nitrogen added to improve the strength of the steel.
305 and 384: stainless steel contains high nickel, and its working hardening rate is low, which is suitable for various occasions with high requirement for cold molding.
308: stainless steel is used to make welding rods.
309, 310, 314 and 330: stainless steel nickel and chromium content are high, in order to improve the oxidation resistance and creep strength of steel at high temperature. While 30S5 and 310S are variations of 309 and 310 stainless steel, the difference is that the carbon content is low, so as to minimize the carbonates precipitated near the weld. 330 stainless steel has a particularly high anti-carburizing capacity and thermal shock resistance.
316 and 317: stainless steel contains aluminum, so the corrosion resistance in the Marine and chemical industrial environments is much better than 304 stainless steel. Among them, 316 stainless steel is made of 316L stainless steel 316L with low carbon stainless steel, 316N of high-strength stainless steel with nitrogen and 316F with high sulfur content.
321, 347 and 348 are respectively titanium, niobium plus tantalum and niobium stabilized stainless steel, suitable for welding components used in high temperature. 348 is a kind of stainless steel which is suitable for nuclear power industry, and has certain limitation on the amount of tantalum and drill.