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Full-Performance Comparison and Working Condition Selection Guide of Carbon Steel and Stainless Steel Fasteners
Full-Performance Comparison and Working Condition Selection Guide of Carbon Steel and Stainless Steel Fasteners
Full-Performance Comparison and Working Condition Selection Guide of Carbon Steel and Stainless Steel Fasteners
Improper material selection will cause fastener rust, fatigue fracture and cost waste. Carbon steel and stainless steel fasteners have different mechanical and anti-corrosion properties, which cannot be replaced arbitrarily. This article attaches a complete parameter comparison table to standardize material selection for all industrial scenarios.
1. Four Common Fastener Material Parameter Table
| Material Type | Anti-Rust Level | Max Strength Grade | Thread Seizure Risk | Magnetic Property | Cost Level | Core Feature |
| Galvanized Carbon Steel | Low | 12.9 Grade | Very Low | Magnetic | Lowest | High strength, poor outdoor rust resistance |
| 201 Stainless Steel | Medium Low | 5.8 Grade | Medium | Weak Magnetic | Low | Indoor use only, poor salt resistance |
| 304 Stainless Steel | High | 8.8 Grade | High | Slight Magnetic | Medium | General anti-corrosion, common outdoor part |
| 316 Stainless Steel | Highest | 8.8 Grade | Very High | Non-magnetic Optional | High | Acid and salt corrosion resistance |
2. Scenario-Based Material Selection Rules
Choose galvanized carbon steel for dry indoor frames, 304 for urban outdoor equipment, 316 for coastal and chemical devices, high-strength carbon steel for heavy-load vibration equipment.
3. Assembly Difference Notes
Carbon steel threads are wear-resistant and reusable. Stainless steel fasteners need anti-seize grease during locking to avoid thread galling. Do not exceed standard torque when fastening stainless steel products.