1. Appearance quality:
Surface finish: The surface of a good
304 stainless steel plate should be smooth and smooth, without obvious unevenness, scratches and oxidation spots.
Color uniformity: A good 304 stainless steel plate has uniform color without obvious color differences and spots.
Edge quality: The edges of a good 304 stainless steel plate should be smooth and free of burrs and rust.
2. Chemical composition:
Nickel and chromium content: A good 304 stainless steel plate should have appropriate nickel and chromium content. Usually the nickel content should be between 8-10% and the chromium content should be between 18-20%.
Content of other elements: A good 304 stainless steel plate should have low levels of carbon, sulfur, phosphorus and other impurities.
3. Physical properties:
Strength and hardness: A good 304 stainless steel plate should have high strength and hardness, which can be judged by tensile test and hardness test.
Corrosion resistance: A good 304 stainless steel plate should have good corrosion resistance, which can be tested through salt spray test and acid-base test.
4. Processing technology:
Cutting process: The cutting edge of a good 304 stainless steel plate should be smooth and free of burrs and cracks.
Bending process: A good 304 stainless steel plate should have no obvious deformation or cracks after bending.
Conclusion: By observing the appearance quality, detecting chemical composition, testing physical properties and understanding the processing technology, we can help us distinguish between good and bad 304 stainless steel plates. When purchasing, it is recommended to choose a reputable supplier and ask for relevant quality certificates and test reports. In addition, understanding some basic knowledge of 304 stainless steel plates is also an important basis for judging quality. Hope this article helps you!
