1. Demand the help of professionals, professionals will be able to rely on the color of the steel surface as well as the degree of smoothness to distinguish the authenticity of the steel.
2. Specialized steel test potion, this potion in the general hardware store can be purchased, so you can not worry about the problem of the source. 304 stainless steel, it is tested by the potion in 3-5 minutes is not discolored. In addition 201 stainless steel, the potion will turn into a deep brownish red in an instant, 202 stainless steel, the potion will turn into a light brownish red in 5 seconds, 301 stainless steel, the potion will turn into a light brick red in 1-2 minutes.
3. Magnet, 304 stainless steel magnetism is relatively small, so we can go to buy a special magnet according to the size of the magnetism to distinguish 304 stainless steel true and false. If the magnetism is large, then it should be 202 stainless steel.
304 stainless steel is a common material in stainless steel, density 7.93 g/cm3, the industry is also called 18/8 stainless steel. High temperature resistance of 800 degrees, with good processing performance, high toughness, widely used in industry and furniture decoration industry and food medical industry.
The common labeling methods in the market are 06Cr19Ni10, SUS304, of which 06Cr19Ni10 generally indicates that the national standard production, 304 generally indicates that the ASTM standard production, SUS 304 indicates that the Japanese standard production.
304 is a general-purpose stainless steel, which is widely used in the production of equipment and machine parts requiring good overall performance (corrosion resistance and molding). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18% chromium and more than 8% nickel. 304 stainless steel is a grade of stainless steel produced in accordance with the American ASTM standard.
Processing methods:
1. Etching method:
Etching processing method, the stainless steel surface using screen printing acid-resistant protective film, and then using ferric chloride liquid etching, the formation of artistic patterns.
2. Spray color method:
Spray color method is in the screen printing after the spray color particles, constitute the surface of the pear skin-like, the formation of artistic patterns.
3. Stamping process:
Stainless steel products, especially stainless steel belt, many times the factory's most primitive processing is the use of punching machine for stamping products. Stamping includes straight punching and stretching in two ways, the general hardness is less than 1/2 are utilized to stretch and bend, hardness higher than 1/2 will be hard, are straight punching.