AISI 304L steel is a type of stainless steel that is resistant to corrosion. It has high resistance to intergranular corrosion at high temperatures (up to 500°C) and excellent resistance in most aggressive environments.
More details:
- AISI 304L is an austenitic stainless steel that contains 18% chromium, 8% nickel, and less than 0.03% carbon.
- Corrosion resistance: AISI 304L has high corrosion resistance in atmospheric conditions, fresh and sea water, and many chemical environments.
- Intergranular corrosion: AISI 304L has a low tendency to intergranular corrosion, making it suitable for use at high temperatures.
- Weldability: AISI 304L is easily welded by various methods.
- Applications: AISI 304L is used in a wide range of industries, including the food industry, chemical industry, mechanical engineering, and construction.
Chemical Composition:
| Element | Content, % |
|---|---|
| Chromium | 18-20 |
| Nickel | 8-10.5 |
| Manganese | 2 |
| Silicon | 1 |
| Molybdenum | 0-0.6 |
| Carbon | ≤ 0.03 |
| Nitrogen | ≤ 0.06 |
| Sulfur | ≤ 0.03 |
| Phosphorus | ≤ 0.045 |
Characteristics:
- Corrosion resistance: AISI 304L has high corrosion resistance in atmospheric conditions, fresh and sea water, and many chemical environments.
- Intergranular corrosion: AISI 304L has a low tendency to intergranular corrosion, making it suitable for use at high temperatures.
- Weldability: AISI 304L is easily welded by various methods.
- Machinability: AISI 304L is well machinable.
Mechanical Properties:
| Property | Value |
|---|---|
| Tensile strength | 515 MPa |
| Yield strength | 670 MPa |
| Elongation at break | 50% |
| Brinell hardness | 183 |
Physical Properties:
| Property | Value |
|---|---|
| Density | 7.93 g/cm³ |
| Melting point | 1450-1495 °C |
| Thermal conductivity | 16.2 W/(m·K) |
| Electrical resistivity | 72 μΩm |
Analogs:
- AISI 304: AISI 304L analog with a slightly higher carbon content (up to 0.08%).
- AISI 316L: AISI 304L analog with the addition of molybdenum, which makes it more resistant to chemical corrosion.
- AISI 321: AISI 304L analog with the addition of titanium, which makes it more resistant to intergranular corrosion.