Introduction of stainless steel (Middle)

Austenitic-ferritic duplex stainless steel

Combines the advantages of austenitic and ferritic stainless steels, and has superplasticity. Austenitic and ferritic stainless steel with about half of each. In the case of low carbon content, chromium (Cr) content in 18% to 28%, nickel (Ni) content in 3% to 10%. Some steels also contain Mo, Cu, Si, Nb, Ti, N and other alloying elements. The steel has both austenitic and ferritic stainless steel characteristics, compared with ferritic, plasticity, toughness, no room temperature brittleness, intergranular corrosion resistance and welding performance are significantly improved, while also maintaining the ferritic stainless steel 475 ℃ brittleness and high thermal conductivity, with super plasticity and other characteristics. Compared with austenitic stainless steel, high strength and resistance to intergranular corrosion and chloride stress corrosion has been significantly improved. Duplex stainless steel has excellent resistance to pore corrosion and is also a nickel saving stainless steel.

Precipitation hardening stainless steel

The matrix is austenitic or martensitic organization, precipitation hardening stainless steel commonly used grades such as 04Cr13Ni8Mo2Al. It can be hardened by precipitation hardening (also known as age-hardening) treatment to make it hard (strong) stainless steel.

Martensitic stainless steel

High strength, but plasticity and weldability is poor. The common grades of martensitic stainless steel are 1Cr13, 3Cr13, etc., because of the high carbon content, so it has high strength, hardness and wear resistance, but slightly poorer corrosion resistance, used in mechanical properties required for high, general corrosion resistance requirements on some parts, such as springs, turbine blades, hydraulic valves, etc.. This type of steel is used after quenching and tempering treatment. Forging, stamping after the need to anneal.

Stainless steel plate and strip for pressure-bearing equipment

Pressure vessel special stainless steel, its classification and code, size, shape and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and product quality certification and other clear requirements. Commonly used grades are 06Cr19Ni10, 022Cr17Ni12Mo2 digital code for: S30408, S31603, etc.. Mainly used in food machinery, pharmaceutical machinery and other sanitary equipment.

Post time: Feb-09-2023