Material Properties
Chemical Composition (wt%)
| Ni ≥58 | Cr 20-23 | Mo 8-10 | Nb 3.15-4.15 | Fe ≤5 | C ≤0.1 | Mn ≤0.5 | Si ≤0.5 | 12.
Mechanical Properties
- Tensile Strength: 690–825 MPa | Yield Strength: 275–415 MPa | Elongation: ≥30% 23.
- Hardness: 150–220 HB | Density: 8.44 g/cm³ | Melting Point: 1290–1350°C 23.
Key Performance Features
- Exceptional resistance to oxidizing acids (e.g., nitric, sulfuric) and chloride-induced stress corrosion cracking 13.
- Maintains strength and stability at temperatures up to 980°C (1800°F) 27.
- Superior performance in marine environments and high-pressure conditions 13.
3. Standards and Specifications
Inconel 625 nuts comply with:
- ASTM B564: Standard for nickel alloy bolting materials 23.
- ASME SB564: Equivalent specifications for pressure vessels 27.
- DIN 934/936: Metric hex nuts and flange nuts 6.
4. Types of Nuts Produced with Inconel 625
- Hex Nuts (ASTM A194 Grade 625)
- Flange Nuts (SAE J995 compliant)
- Lock Nuts (all-metal prevailing torque or Nylock variants)
- Cap Nuts and Wing Nuts for specialized equipment 23.
5. Key Applications
Aerospace & Defense
- Jet engine components (combustion chambers, turbine blades) and structural fasteners exposed to extreme heat and stress 45.
Chemical & Petrochemical
- Reactors, heat exchangers, and pipelines handling sulfuric acid, hydrochloric acid, and chlorides 34.
Marine & Offshore
- Subsea fasteners, seawater pumps, and offshore platform components resistant to saltwater corrosion 35.
Nuclear Energy
- Reactor pressure vessel bolts and fuel assembly fasteners requiring radiation resistance 26.
- Inconel 625 Nuts
- UNS N06625 Fasteners
- High-Temperature Alloy 625 Nuts
- ASTM B564 Inconel 625 Nuts
- “Inconel 625 Hex Nuts for Aerospace Engines”
- “Marine-Grade Inconel 625 Flange Nuts”
- “Corrosion-Resistant Alloy 625 Lock Nuts”
Suggested Tables
Table 1: Chemical Composition of Inconel 625
| Element | Ni | Cr | Mo | Nb | Fe | C | Mn | |
| wt% | ≥58 | 20-23 | 8-10 | 3.15-4.15 | ≤5 | ≤0.1 | ≤0.5 | 12. |
Table 2: Mechanical Properties
| Tensile Strength | Yield Strength | Elongation | Hardness | |
| 690–825 MPa | 275–415 MPa | ≥30% | 150–220 HB | 23. |
Conclusion
Inconel 625 nuts are critical in industries demanding extreme corrosion resistance, high-temperature stability, and mechanical strength. Their compliance with ASTM, ASME, and DIN standards ensures reliability in aerospace, marine, nuclear, and chemical processing applications.
Inconel 625 nuts, UNS N06625 fasteners, aerospace alloy nuts, marine-grade Inconel nuts.
“Inconel 625 nuts for aerospace and marine applications.” Use internal links to related products (e.g., “Inconel 625 bolts” or “nickel-chromium alloy washers”) and add alt-text for tables (e.g., “Inconel 625 nut chemical composition”).
