Types and uses of stainless steel

1, Ferritic stainless steel

With a 15% to 30% chromium. Its corrosion resistance, toughness, and weldability increases with chromium-containing amounts, and chloride stress corrosion performance is better than other types of stainless steel, high chromium-containing amount, corrosion resistance and oxidation resistance, but mechanical properties Unlike process performance, mostly used for acid-resistant structures and antioxidant steel used.

Uses: For nitric acid and food factory equipment, parts operated at high temperatures, such as gas turbine parts, and the like.

2, Austenitic stainless steel

The chromium is greater than 18%, and also contains about 8% of nickel and a small amount of molybdenum, titanium, and nitrogen. Good comprehensive performance, resistant to a variety of media corrosion. Austenitic stainless steel has a common grade of 1 cr18 ni9, 0Cr19Ni9, etc. Such steel has good plastic, toughness, weldability, corrosion resistance and no magnetic or weak magnetic properties, and better corrosion resistance in oxidative and reducing media.

Uses: It is used to make acid-resistant devices such as corrosion-resisting containers and equipment lining, transport pipes, nitric acid-resistant equipment, etc., and can also be used as the main material of the stainless steel clock jewelry.

3, Austenite-ferrite double phase stainless steel

The austenite and ferrite tissue each account for approximately half of stainless steel. Plastic, higher toughness, free chain, resistant to corrosion resistance and welding performance are significantly improved, while also maintaining 475 ° C brittleness of ferrite stainless steel and high thermal conductivity, superplasticity.

Uses: The superior mechanics and corrosion-resistant comprehensive performance have won the favor of users, which has become an excellent corrosion resistant engineering material that saves weight and saving investment.

4, Precipitated hardening stainless steel

The substrate is austenitic or martensite tissue, and the common grades of precipitated hardened stainless steel are 04Cr13Ni8mo2al or the like. It can treat its hard (strong) stainless steel by precipitating hardening (also known as aging).

Uses: It is widely used in cutting-edge industrial and civil industries, such as typical precipitation hardening stainless steel 17-4P, which can be used to make structures below 370 ° C, requiring corrosion resistance, wear resistance, and high strength.

5, Martensite stainless steel

High strength, but poor plasticity and weldability. The common grades of martensite stainless steel have 1 cr13, 3Cr13, etc., due to high carbon, there is a high strength, hardness and wear resistance, but the corrosion resistance is slightly.

Uses: For some parts, such as spring, steam turbine blades, hydraulic volulines, and the like for mechanical properties. This type of steel is used after quenching and tempering. Forging, you need to be annealed after stamping.

6, Stainless steel plate and steel strip with pressure equipment

Pressure vessels are dedicated to stainless steel, their classification and code, size, shape and allowance deviation, technical requirements, test methods, inspection rules, packaging, logo and product quality certificate, etc. have clear requirements. Common number of 06Cr19Ni10, 022Cr17Ni12MO2 number code is: S30408, S31603, etc.

Uses: Mainly used in sanitary equipment such as food machinery, pharmaceutical machinery.