304 stainless steel has the characteristics of good processing performance and high toughness. Is the industry recognized high-quality stainless steel. Now we can judge the corresponding brand by testing the material composition of 304 stainless steel. The quality of stainless steel is determined by relevant mechanical and corrosion tests and compositions.
1. Identification method of friction sparks: Using the sparks generated by the high-speed rotating grinding wheel, the chemical composition and approximate content of the materials are identified with 304 materials and 201 materials respectively. Due to the high temperature effect of friction, the number and shape of sparks produced by the oxidation of different element particles are different.
2. Identification method of stainless steel potion: It can be purchased directly from the stainless steel accessories store, and each bottle is about 15 yuan. The stainless steel discriminator water was dropped on the 304 and 201 materials respectively. It takes a minute or two to tell the difference. And different materials, the color of the potion is also different:
(1) 201: The droplet instantly (5 seconds) turns brown;
(2) 202: The droplet turns brown-red in about 20 seconds;
(3) 301: The droplet turns light red in 30 seconds;
(4) 304: The droplet slowly turns light gray over 50 seconds.
3. There are two ways to professionally detect the composition of stainless steel. One is to use a direct reading spectrometer to detect all elements, and to detect the C element. The other is an X-ray fluorescence spectrometer. The method is fast, portable, and can accurately detect components and grades.
Of course, these methods are more professional and accurate than using stainless steel measuring liquid, but they are also much more difficult or costly. In addition, the quality of stainless steel is not only determined by its chemical composition, but also related to its structure, performance, purity and other factors. For the determination of these factors, the stainless steel determination solution is obviously powerless, only with the help of relevant professional testing and inspection.