What are the characteristics of 304 stainless steel coil

Among many similar materials, 304 ss coil is especially popular. What are the advantages of 304 stainless steel coil? Where are the limitations of 304 stainless steel coil?

l What are the advantages of 304 stainless steel coil?

l What are the disadvantages of 304 stainless steel coil?

l How to process 304 stainless steel coil?

What are the advantages of 304 stainless steel coil?

1. 304 stainless steel coil has excellent rust resistance and inter-granular corrosion resistance. It has strong corrosion resistance to oxidizing acids, such as nitric acid with concentration ≤65% below boiling point. It also has good corrosion resistance to alkali solutions and most organic and inorganic acids.

2. 304 stainless steel coil has excellent cold and hot processing performance. Can process the production of plate, tube, line, belt, type and other products. Suitable for manufacturing cold heading, deep drawing, deep drawing forming parts.

3. Good low temperature performance. At -180℃, the strength, elongation and area shrinkage are very good. Because there is no brittle transition temperature, it is often used at low temperatures.

4. It has good welding performance. Common welding method can be used for welding, without heat treatment before and after welding.

What are the disadvantages of 304 stainless steel coil?

1. 304 steel also has performance defects: large section steel is sensitive to inter-granular corrosion after welding; They are very sensitive to stress corrosion in C1 containing water (including moist atmosphere); They have low mechanical strength and poor cutting performance.

2. Due to the shortcomings of 304 stainless steel performance, people try to play its advantages in production and use, avoid its shortcomings, play its excellent performance, to overcome its shortcomings. Therefore, through research and development, according to the specific requirements of different use environment or conditions, adjust its chemical composition, developed to meet the requirements of certain characteristics of the use of 304 derivative brand.

How to process 304 stainless steel coil?

1. Carbon content: Reduce or increase carbon content. 304L is an ultra low carbon 304 steel. Reducing carbon content can improve corrosion resistance, especially the inter-granular corrosion sensitivity of 304 steel after welding. It can be used to manufacture welding parts with larger section size when the mechanical strength requirements are met. 304H, the carbon content is increased to 0.10%, increase the strength of 304 steel, so that the austenite is more stable than 304 steel, suitable for low temperature environment and non-magnetic parts.

2. Nitrogen content: add nitrogen. The strength of 304 N (SUS304 N 1) and XM-21 (SUS304 N 2) steels is improved by the solution strengthening effect of nitrogen, but the ductility and toughness of steels are not decreased obviously. At the same time, the ability of resisting inter-granular corrosion, pitting corrosion and crevice corrosion of steel is further improved.

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