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316 Stainless Plate
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316 stainless steel plate is a high-performance austenitic stainless steel widely used in marine, chemical, and high-corrosion environments. Compared with 201 and 304 stainless steel, 316 offers significantly stronger corrosion resistance due to its unique alloy composition, especially the addition of molybdenum (Mo).
1. Chemical Composition Comparison
| Grade | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Carbon (C) |
|---|---|---|---|---|
| 201 | 16–18% | 3.5–5.5% | None | ≤0.15% |
| 304 | 18–20% | 8–10.5% | None | ≤0.08% |
| 316 | 16–18% | 10–14% | 2–3% | ≤0.08% |
The key difference is that 316 contains molybdenum, which greatly improves resistance to chloride and seawater corrosion.
2. Corrosion Resistance Comparison
201 Stainless Steel
- Lowest corrosion resistance among the three
- Suitable for dry indoor environments
- Prone to rust in humid or coastal conditions
304 Stainless Steel
- Good general corrosion resistance
- Suitable for most indoor and mild outdoor environments
- Standard industrial grade
316 Stainless Steel
- Excellent resistance to chloride, saltwater, and chemicals
- Ideal for marine and coastal environments
- Best performance in aggressive corrosion conditions
3. Mechanical Performance Comparison
| Property | 201 | 304 | 316 |
|---|---|---|---|
| Strength | High | Medium | Medium |
| Ductility | Low | Good | Very good |
| Weldability | Moderate | Good | Excellent |
| Corrosion resistance | Low | Good | Excellent |
4. Application Differences
201 Stainless Steel
- Interior decoration
- Low-cost household products
- Dry environment components
304 Stainless Steel
- Kitchen equipment
- Food processing machinery
- General industrial use
316 Stainless Steel
- Marine equipment
- Offshore structures
- Chemical processing plants
- Pharmaceutical and medical equipment
5. Why 316 is the Highest Grade Among the Three
316 stainless steel stands out because:
- Contains molybdenum (Mo) for chloride resistance
- Strong performance in seawater environments
- Long service life in harsh conditions
- Reduced risk of pitting and crevice corrosion
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