Three characteristics of stainless steel pipe: weldability, corrosion resistance, polishing performance (BQ)
Different welding applications have different requirements for welding performance. A type of tableware generally does not require welding performance, and even includes some pot companies. However, most products require good welding performance of raw materials, such as second-class tableware, insulation cups, steel pipes, water heaters, drinking fountains and so on.
Corrosion resistance The vast majority of stainless steel products require good corrosion resistance, stainless steel tube like the first and second categories of tableware, kitchen utensils, water heaters, drinking fountains, etc., some foreign businessmen also do corrosion resistance test on the product: use NACL aqueous solution to warm up to boiling After a period of time, the solution is discarded, washed and dried, and the weight loss is determined to determine the degree of corrosion. (Note: When the product is polished, the presence of Fe in the emery cloth or sandpaper will cause rust on the surface during the test.)
Polishing performance (BQ)
At present, stainless steel products are generally polished in the production process, and only a few products such as water heaters, drinking fountain liners, etc. do not need to be polished. Therefore, this requires good polishing properties of the raw materials. The following factors affect the polishing performance:
1 Raw material surface defects. Such as scratches, pits, pickling, etc.
2 stainless steel tube raw material issues. Hardness is too low, it is not easy to polish when polishing (BQ is not good), and the hardness is too low, the surface of the orange peel is prone to occur when deep drawing, thus affecting the BQ. Hardness of BQ is relatively good.
3 After deep drawing, the surface of the area with a large amount of deformation will also have small black spots and RIDGING, thus affecting the BQ property.
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