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304 vs 316 Stainless Steel: Differences and Torx Screw Applications
304 vs 316 Stainless Steel: Differences and Torx Screw Applications
[Material Analysis] Stainless steel 304 and 316 are the two most common materials for torx screws. Correct selection is crucial for product quality.
Chemical Composition Comparison:
| Element | 304 (A2) | 316 (A4) |
|---|---|---|
| Chromium (Cr) | 18-20% | 16-18% |
| Nickel (Ni) | 8-10.5% | 10-14% |
| Molybdenum (Mo) | None | 2-3% |
| Carbon (C) | ≤0.08% | ≤0.08% |
Performance Comparison:
- Corrosion Resistance: 316 > 304 (316 contains molybdenum, better pitting resistance)
- Strength: 304 tensile 520MPa, 316 tensile 540MPa
- Temperature Range: 304 (-196°C~800°C), 316 (-196°C~850°C)
- Price: 316 is 40-50% more expensive than 304
Application Recommendations:
✅ 304 Applications:
- Indoor dry environments
- General machinery
- Home appliances
- Food processing equipment (non-strong acid/alkali)
- Architectural decoration
✅ 316 Applications:
- Marine environments (ships, docks)
- Chemical equipment (acid/alkali resistance)
- Medical devices
- Food & beverage (high hygiene requirements)
- Outdoor high-corrosion environments
JiaLi Hardware provides both 304 and 316 material torx screws with material test reports available.