The following are common classifications and specific models:
Classified by ingredients:
Chromium stainless steel: with chromium as the main alloying element, such as 4Cr13, Cr17, Cr28, Cr17Ti, etc., it has certain corrosion resistance and hardness, and is commonly used in the manufacture of products such as cutting tools and molds that require high hardness and wear resistance.
Chromium nickel stainless steel: It contains two main alloying elements, chromium and nickel, such as 0Cr18Ni9Ti, Cr18Ni12Mo2Ti, etc. It has good corrosion resistance, plasticity, and toughness, and is the most widely used type of stainless steel, commonly used in industries such as food, medical, and chemical.
Chromium manganese nitrogen stainless steel: In addition to chromium, it also contains elements such as manganese and nitrogen, such as Cr17Mn13Mo2N. This type of stainless steel has high strength, relatively good corrosion resistance, and relatively low cost. It is suitable for occasions where corrosion resistance is not particularly high but strength is required.
Classified by organizational status:
Austenitic stainless steel:
200 series: belongs to chromium manganese nickel austenitic stainless steel, such as 201, 202, etc. The 200 series stainless steel has a lower nickel content and a higher manganese content, and has a certain degree of corrosion resistance, but its strength and corrosion resistance are relatively weaker compared to the 300 series stainless steel. 201 stainless steel is commonly used in building decoration, municipal engineering, etc; 202 stainless steel can be used for some structural components that do not require high corrosion resistance.
300 series: It is a chromium nickel austenitic stainless steel, with common models including 301, 302, 303, 304, 309, 310, 316, etc.
301 stainless steel has good ductility and can be used for forming products. It can also be quickly hardened through mechanical processing, and has good weldability. Its wear resistance and fatigue strength are superior to 304 stainless steel.
302 stainless steel has similar corrosion resistance to 304, but has a relatively high carbon content, resulting in better strength.
303 stainless steel is easier to cut than 304 by adding a small amount of sulfur and phosphorus.
304 stainless steel, also known as 18/8 stainless steel and GB grade 0Cr18Ni9, is a universal stainless steel widely used in the production of equipment and components that require good comprehensive performance (corrosion resistance and formability).
309 stainless steel has higher nickel and chromium content and better temperature resistance.
316 stainless steel, with the addition of molybdenum element on the basis of 304 stainless steel, has better corrosion resistance, especially in marine and chemical industrial environments, with significantly better resistance to pitting corrosion than 304 stainless steel. It is commonly used in the food industry, pharmaceutical industry, and surgical equipment.
Ferritic stainless steel: The main models include 409, 430, etc. in the 400 series. This type of stainless steel has a high chromium content and good corrosion resistance, but relatively low plasticity and toughness. It is commonly used to produce products that require high corrosion resistance but low plasticity and toughness, such as automotive accessories, kitchen utensils, etc.
Martensitic stainless steel: including 410, 420, 440 in the 400 series. Martensitic stainless steel has magnetism and high strength, but poor plasticity and weldability,