AISI 330 is an austenitic chromium-nickel stainless steel with a high nickel content, which possesses exceptional heat resistance, oxidation resistance, and resistance to carburization. Due to its unique properties, AISI 330 is widely used in extreme conditions of high temperatures and aggressive environments.
Advantages of AISI 330:
- High heat resistance: AISI 330 can be operated at temperatures up to 1200°C without significant oxidation or loss of strength. This makes it ideal for furnaces, boilers, heat exchangers, and other components that operate at high temperatures.
- Oxidation resistance: AISI 330 has high oxidation resistance in atmospheric conditions, as well as in chemical environments such as sulfur gases, nitric acid, and alkali solutions.
- Resistance to carburization: AISI 330 is resistant to carburization, which makes it ideal for use in furnaces with gas or carburetor heating.
- Good strength: AISI 330 has high strength at high temperatures, which makes it capable of withstanding significant loads.
- Weldability: AISI 330 is easily welded by various methods, which makes it convenient for manufacturing and repair.
- Corrosion resistance: AISI 330 has high corrosion resistance in fresh, salt water, and many chemical environments.
- Good machinability: AISI 330 can be machined by various methods, which makes it convenient for manufacturing complex-shaped parts.
Chemical composition:
| Element | Content, % |
|---|---|
| Chromium | 17-19 |
| Nickel | 34-38 |
| Manganese | 1-2 |
| Silicon | 1-2 |
| Molybdenum | 0.2-0.6 |
| Nitrogen | 0.04-0.10 |
| Carbon | 0.08 max |
| Iron | remainder |
Mechanical properties:
| Property | Value |
|---|---|
| Tensile strength | 620 MPa |
| Brinell hardness | 200 HB |
| Elongation at break | 50% |
| Impact toughness | 80 J/cm² |
Physical properties:
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting point | 1425°C |
| Thermal conductivity | 16.3 W/(m·K) |
| Electrical resistivity | 1.05 μΩm |
Analogs:
| Country | Analog |
|---|---|
| USA | AISI 330 |
| European Union | EN 1.4864 |
The most common applications of AISI 330:
Power industry:
- Furnaces for heat treatment (hardening, annealing, carburizing)
- Waste heat boilers
- Heat exchangers for exhaust gases
- Gas turbine parts
Chemical industry:
- Evaporators
- Reactors for aggressive environments
- Pipelines for transportation of chemicals
Oil and gas industry:
- Drilling rigs
- Pumps for oil and gas transportation
- Tanks for oil and gas storage
- Equipment for oil and gas production and processing
Mechanical engineering:
- Engine parts (valves, exhaust manifolds)
- Elements of exhaust systems
- Parts of furnaces and other thermal equipment
Metallurgy:
- Rolling mill rolls
- Furnaces for metal heating
- Recuperators
Other industries:
- Food industry (equipment for processing and storage of food products)
- Textile industry (equipment for dyeing and processing of textiles)
- Medical industry (surgical instruments, implants)
- Construction (architectural elements, cladding)
AISI 330 is a versatile material that can be used in a variety of conditions. Its high heat resistance, corrosion resistance, and resistance to other aggressive media, as well as its good strength, make AISI 330 an ideal choice for many industries.
It is important to note that AISI 330 is not recommended for use in contact with sulfuric acid and chlorides at high temperatures.
When choosing stainless steel, it is important to consider the operating conditions and the required properties. AISI 330 can be an optimal choice for applications where high heat resistance, oxidation resistance, and carburization resistance are required, as well as good weldability and machinability.