Corrosion Resistance

Most stainless steel products require excellent corrosion resistance. Seamless steel tubes are similar to I and II class tableware, kitchenware, water heaters, drinking water dispensers, and so on. Some foreign merchants also conduct corrosion resistance tests on the products: using a warm, boiling solution of NaCl, the solution is drained, washed, and dried after a period of time, and the weight loss is determined to ascertain the degree of corrosion.

Weldability processing

Welding performance requirements vary by product. Tableware typically does not require welding capabilities, even for some pot manufacturers. However, most products demand high-quality welding properties in the raw materials, such as second-class tableware, thermal-insulating cups, steel pipes, water heaters, and drinking water machines.

3. Polishing properties

Currently, stainless steel products are generally polished during the production process, with only a few products such as water heaters and water filter linings not requiring polishing. Therefore, this requires good polishing properties of the raw materials. The main factors affecting polishing performance are as follows:

1. Surface defects of raw materials, such as scratches, pockmarks, and soaking.

2. Seamless steel tube raw material issue. Too low hardness, difficult to polish during polishing (BQ not good), too low hardness, the surface may easily appear orange peel during deep drawing, affecting BQ performance. Higher hardness BQ is relatively better.

After deep drawing, small black spots and high RII (simulated DING) may appear on the surface of the areas with significant deformation, which can affect the BQ properties.