AISI 347 STEEL is an austenitic chromium-nickel stainless steel with a high content of nickel and molybdenum, which possesses exceptional corrosion resistance in various environments, high heat resistance, and good strength.
Advantages of AISI 347 Steel:
- Corrosion resistance: AISI 347 has high corrosion resistance in atmospheric conditions, in fresh and salt water, in solutions of acids and alkalis, as well as in a number of other aggressive environments.
- Heat resistance: AISI 347 can be operated at temperatures up to 1150°C without significant oxidation or loss of strength.
- Strength: AISI 347 has high strength at high temperatures, which makes it capable of withstanding significant loads.
- Weldability: AISI 347 is easily welded by various methods, which makes it convenient for manufacturing and repair.
- Machinability: AISI 347 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 |
| Molybdenum | 3-4 |
| Manganese | 1-2 |
| Silicon | 1-2 |
| Nitrogen | 0.04-0.10 |
| Carbon | 0.08 max |
| Iron | the rest |
Mechanical properties:
| Property | Value |
|---|---|
| Tensile strength | 620 MPa |
| Brinell hardness | 200 HB |
| Relative elongation | 50% |
| Impact strength | 80 J/cm² |
Physical properties:
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting point | 1425°C |
| Thermal conductivity | 16.3 W/(m·K) |
| Electrical resistance | 1.05 μΩm |
Analogues:
| Country | Analogue |
|---|---|
| USA | AISI 347 |
| European Union | EN 1.4550 |
| Ukraine | 08Х18Н12Б |
Most common applications of AISI 347:
- Chemical industry:
- Equipment for production of chemicals
- Tanks for storage of chemical products
- Pipelines for transportation of chemicals
- Food industry:
- Equipment for processing and storage of food products
- Oil and gas industry:
- Equipment for production and processing of oil and gas
- Power industry:
- Parts of boilers and other heat exchange apparatuses
- Mechanical engineering:
- Engine parts
- Elements of exhaust systems
- Medical industry:
- Surgical instruments
- Implants
- Construction:
- Architectural elements
- Cladding
AISI 347 is a versatile material that can be used in various conditions. It is suitable for applications where resistance to corrosion, high temperatures and other aggressive influences is required.
It is important to note that AISI 347 is not recommended for use in concentrated solutions of sulfuric acid and chlorides due to the possibility of intergranular corrosion.
When choosing stainless steel, it is important to consider operating conditions and required properties. AISI 347 can be an optimal choice for applications where high corrosion resistance and heat resistance are required, as well as good weldability and machinability.