Nowadays, S31803 ASTM 304 A240 stainless steel plate is inseparable from construction and decoration. Stainless steel plate is a kind of steel plate with good anti-corrosion ability. Therefore, many steel plate manufacturers are increasing the production of stainless steel plate. Some unscrupulous traders only pursue profits in order to ignore the quality of stainless steel plates. The following introduces several selection methods of S31803 ASTM 304 A240 stainless steel plate.
Stainless steel plate is a kind of material with strong anti-corrosion ability, so it has been widely used, but when we choose S31803 ASTM 304 A240 stainless steel plate, if we buy fake and inferior products, the corrosion resistance of the material is also very poor , So when we buy stainless steel plate, we need to pay attention to the selection method.
1. Before selecting stainless steel plates, the purpose and use environment of stainless steel plates should be considered. For example, welded pipes are generally used for decoration, seamless pipes are generally used for fluid transportation, sanitary stainless steel plates are used for medical treatment or kitchens, and thick-walled pipes are used for pressure; generally, 200 series materials can be used indoors, and 304 and other materials are required for outdoor use. Materials above 316 are generally used in acidic and alkaline places or coastal areas.
2. When selecting steel pipes, it must be determined that the material meets the standard. Take 304 material as an example:
a. From the price analysis, if the 304 stainless steel plate is even lower than the general price of the 301 material on the market, it must be carefully identified, it is likely to be impersonated by other materials;
b. Identify whether the steel stamp material "304" is printed on the surface of the tube, and ask for the manufacturer's quality certificate as a certificate;
c. It can be tested with an acid reagent, after 30 seconds, the material 304 will not change color, and the material 201 will turn black;
d. For bulk purchases, samples can be taken and sent to the national authoritative testing center for component testing.
3. Check whether the color of the outer surface and the inner wall of the tube is bright and smooth, whether the thickness is uniform or rough. Generally, the welded pipe does not need to be inspected, and the seamless steel pipe is produced by cold drawing or hot rolling. Improper operation in the production process is prone to uneven thickness, cracks on the pipe surface, etc., and the rough surface is generally seamless. No polishing treatment, if there is no special requirement for appearance, it will not affect the use.
4. When purchasing, you should choose excellent products that have been evaluated by the Quality and Technical Supervision Bureau. It is the most direct and effective purchase method to have a long-term use testimonial and a good reputation among customers.
5. There are often inner heavy skins, pits, and rolling blue lines in rolled pipes. Under normal circumstances, these are unavoidable and do not affect the use. However, when purchasing, you must choose as few as possible, especially when checking The inner surface.
6. Be sure to choose big brand stainless steel, such as Taigang, Baosteel, Chengde, Hongwang and other brands.