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Description
Chemical Composition and Mechanical Properties of SUS316L Stainless Steel
SUS316L is an austenitic stainless steel with the following composition and properties:
Chemical Composition:
| Element | Percentage |
|---|---|
| Chromium | 16.0-18.0% |
| Nickel | 10.0-14.0% |
| Molybdenum | 2.00-3.00% |
| Carbon | ≤0.030% |
| Manganese | ≤2.00% |
| Silicon | ≤0.75% |
| Phosphorus | ≤0.045% |
| Sulfur | ≤0.030% |
Mechanical Properties:
| Property | Value |
|---|---|
| Yield Strength (min) | 175 MPa |
| Tensile Strength (min) | 480 MPa |
| Elongation (min) | 40% |
| Hardness (max) | 187 HB |
Applications and Industries Using SUS316L
SUS316L is widely used in various industries due to its excellent corrosion resistance:
- Chemical processing equipment
- Food processing equipment
- Pharmaceutical and photographic equipment
- Marine applications
- Heat exchangers
- Pulp and paper industry
- Textile processing equipment
- Surgical instruments and implants
Manufacturing Process of SUS316L Stainless Steel
The manufacturing process of SUS316L typically involves:
- Melting raw materials in an electric arc furnace
- Refining the molten metal using AOD or VOD processes
- Continuous casting into slabs
- Hot rolling to reduce thickness
- Cold rolling to achieve final dimensions
- Annealing at 1050°C for 1 hour, followed by water quenching
- Final surface treatment and quality control
Comparison of SUS316L with SUS316 and Other Grades
| Grade | Carbon Content | Corrosion Resistance | Weldability |
|---|---|---|---|
| SUS316L | ≤0.030% | Excellent | Excellent |
| SUS316 | ≤0.08% | Very Good | Good |
| SUS304 | ≤0.08% | Good | Excellent |
SUS316L offers improved resistance to intergranular corrosion after welding or high-temperature exposure compared to SUS316 due to its lower carbon content.
Corrosion Resistance and Heat Treatment of SUS316L
SUS316L exhibits excellent corrosion resistance:
- Highly resistant to pitting and crevice corrosion
- Suitable for use in marine environments
- Resistant to many chemicals and acids
Heat treatment:
- Solution annealing: 1050°C for 1 hour, followed by water quenching
- Can be continuously exposed to temperatures of 427°C – 857°C without significant carbide precipitation
At HL Steel Company, we offer high-quality SUS316L stainless steel products tailored to meet your specific industrial needs, ensuring superior performance in corrosive environments and high-temperature applications.
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