What are the corrosion resistance properties of colored stainless steel plates made of different materials? People who have a certain understanding of stainless steel plates should know that during the smelting process of stainless steel plates, due to different construction techniques, the metal elements contained in the manufactured stainless steel plates are also different. This is also the main reason why the corrosion resistance of stainless steel plates of different materials is different. Taking the commonly used 300 series stainless steel plates as an example, we will compare the corrosion resistance of 300 stainless steel plates of different materials.

The most commonly used stainless steel plate in production and life is 304 stainless steel plate, which is often used in equipment and high-end mechanical parts that require good overall performance. As a supplement, the 301 stainless steel plate is harder than the 304 stainless steel plate, so it will have work hardening characteristics when deformed, so it is often used in higher strength situations. The 304 stainless steel plate can obtain stronger strength through cold rolling processing, so it will become a 302 stainless steel plate material.

302B stainless steel plate is a stainless steel plate with a high silicon content added, which has excellent resistance to high temperature oxidation. Both 303 and 303Se are stainless steel plates that are easy to cut and suitable for applications with high smoothness. These two materials contain sulfur and selenium respectively. In particular, stainless steel plates made of 303Se can also be used to make parts that require heat treatment, so under such conditions, the stainless steel plates have good heat-processability.

304L stainless steel plate refers to a variety with lower carbon content than 304 stainless steel plate, where L means low content. The lower carbon content can minimize the precipitation of carbides in the heat-affected zone close to the weld, and the precipitation of such carbides may cause intergranular corrosion of stainless steel in certain environments, which is often the case. Talking about welding corrosion. Stainless steel containing nitrogen elements is commonly known as 304N stainless steel plate. Its hardening rate is relatively low, and it is most often used in various occasions that require relatively high cold forming processing.

If the stainless steel plate contains both nickel and chromium, the stainless steel will be stainless steel made of 309, 310, 314 and 330. These two elements can improve the oxidation resistance and creep resistance of the stainless steel in high temperature environments. Change intensity. However, 305S and 310S are variants of stainless steel plates made of 309 and 310, so the carbon content contained in different materials is relatively low, and this is mainly to prevent the carbonization precipitated near the stainless steel plate when it is welded. Things can be reduced to a minimum. The stainless steel plate made of 330 material also has particularly high resistance to carburization and thermal shock resistance.

Nowadays, the stainless steel plates with stronger oxidation resistance in marine and chemical industrial environments are stainless steel plates made of 316 and 317 materials containing aluminum. Type 316 stainless steel plates also include low-carbon stainless steel 316L and nitrogen-containing high-strength stainless steel 316N. and free-cutting 316F stainless steel with a higher sulfur content.

High-performance 321, 347 and 348 stainless steel plates mainly contain titanium, niobium plus tantalum, and niobium stabilizing elements respectively. This high-quality stainless steel is most suitable for welding construction at high temperatures. Among them, 348 stainless steel plate is a kind of stainless steel suitable for use in the nuclear power industry. It has certain restrictions on the content of tantalum and cobalt elements.