304L (18Cr-8Ni-LowC) is low carbon 304 steel. Corrosion resistance is similar to 304 in normal state. However, it has good resistance to intergranular corrosion after welding or stress relief.

(18Cr-12Ni-2.5Mo) has excellent corrosion resistance, pitting corrosion resistance, high temperature resistance and strength due to the addition of Mo, and can be used in harsh environments. Excellent work hardening properties.

316L (18Cr-12Ni-2.5Mo-LowC) low carbon 316 steel retains the characteristics of 316 steel and has good resistance to intergranular corrosion. 400 series stainless steel is an alloy of iron, carbon and chromium. This stainless steel has a martensitic structure and iron elements, so it has normal magnetic properties.

Main features of 304 stainless steel plate:

1. Weldability

Different product uses have different requirements for welding performance. Category I tableware generally does not require welding performance, even for some pot-type companies. But most products require raw materials with good welding performance, such as second-class tableware, thermos cups, steel pipes, water heaters, water dispensers, etc.

2. Corrosion resistance

Most stainless steel products require good corrosion resistance, such as Class I and II tableware, kitchen utensils, water heaters, drinking fountains, etc. Some foreign businessmen also conduct corrosion resistance tests on their products: heat NACL aqueous solution until it boils, and pour it after a period of time. Remove the solution, wash and dry, and weigh the weight loss to determine the degree of corrosion (Note: When polishing the product, the Fe component in the emery cloth or sandpaper will cause rust spots to appear on the surface during the test)

3. Polishing performance of 304 stainless steel plate

In today's society, stainless steel products generally go through the polishing process during production. Only a few products, such as water heaters and water dispenser linings, do not require polishing. Therefore, this requires the raw material to have good polishing performance. The factors that affect polishing performance mainly include the following points:

①Surface defects of raw materials. Such as scratches, pitting, pickling, etc.

② Raw material problem. If the hardness is too low, it will be difficult to polish during polishing (poor BQ properties). Moreover, if the hardness is too low, orange peel phenomenon will easily appear on the surface during deep drawing, thus affecting the BQ properties. BQ with high hardness is relatively good.

③For products that have undergone deep drawing, small black spots and RIDGING will appear on the surface in areas with great deformation, thus affecting BQ properties.