Austenitic stainless steel

Austenitic stainless steel is one of the most common types of stainless steel with distinctive characteristics. It is usually non-magnetic, with high toughness and good weldability. Typical brands such as 304, 316, 321, etc. Taking 304 stainless steel as an example, because it contains 18% chromium (CR) and 8% nickel (Ni), it has good corrosion resistance and sanitary performance, and is widely used in kitchen equipment, food processing equipment, architectural decoration and other fields. 316 stainless steel, on the basis of 304, is added with 2-3% molybdenum (MO) and contains more nickel (usually 10-14%), which makes it superior in corrosion resistance, especially with stronger resistance to chloride, and is suitable for corrosive environments such as chemical industry and ocean.

Ferritic stainless steel

Ferritic stainless steel is magnetic. One of its advantages is its low cost because it does not contain nickel. This stainless steel has excellent cold working performance and is suitable for deep stamping. In some environments, its corrosion resistance is even better than that of austenitic stainless steel. It is often used to manufacture parts that require magnetism, and some products that are sensitive to cost and require certain corrosion resistance, such as automotive exhaust system components.

Martensitic stainless steel

Martensitic stainless steel can obtain high strength and hardness through heat treatment processes such as quenching and tempering. It has strong magnetism and excellent wear resistance. In daily life, many of our common knives are made of martensitic stainless steel, such as kitchen knives and outdoor military knives. In addition, it is also widely used in bearings, turbine blades and other fields, where materials with high hardness, high strength and good wear resistance are required.

Duplex stainless steel

Duplex stainless steel has a unique duplex structure of austenite and ferrite. This structure gives it higher strength than austenitic stainless steel. At the same time, it has excellent pitting corrosion and stress corrosion cracking resistance. In the field of marine engineering, such as the hull structure of ships and related equipment of offshore platforms, duplex stainless steel can well resist the corrosion of seawater and complex stress environment, and ensure the long-term stable operation of equipment. It is also widely used in some pipeline systems in the chemical industry.

Precipitation hardening stainless steel

The strength and hardness of precipitation hardening stainless steel can be improved by aging treatment. It combines good strength, toughness and corrosion resistance. It is often used in the aerospace field, such as manufacturing aircraft structural components, engine parts, etc. In these application scenarios, the materials need to have high strength and adapt to complex flight environment. Precipitation hardening stainless steel just meets these strict requirements.