Product Description
Inconel 625 Bolts and Nuts are high-performance fasteners manufactured from premium Inconel 625 (UNS N06625) alloy. Inconel 625 is a nickel-based superalloy reinforced with molybdenum and niobium, offering exceptional corrosion resistance and outstanding high-temperature strength.
Our Inconel 625 fasteners are widely used in aerospace, petrochemical, marine engineering, nuclear power, and other extreme industrial applications. They maintain stable mechanical performance across a broad temperature range from -253°C to 700°C.
Key Advantages
- Outstanding Corrosion Resistance: Highly resistant to pitting, crevice corrosion, intergranular corrosion, and chloride stress corrosion cracking
- Excellent High-Temperature Performance: Maintains excellent tensile and yield strength at temperatures up to 700°C
- Superior Low-Temperature Toughness: Retains exceptional impact toughness in cryogenic conditions, ideal for LNG applications
- High Strength: Tensile strength ≥ 760 MPa, yield strength ≥ 345 MPa in annealed condition
- Good Machinability: Supports hot working, cold working, welding, and various processing methods
Chemical Composition
| Element | Content |
|---|---|
| Nickel (Ni) | ≥ 58.0% |
| Chromium (Cr) | 20.0 – 23.0% |
| Molybdenum (Mo) | 8.0 – 10.0% |
| Niobium + Tantalum (Nb+Ta) | 3.15 – 4.15% |
| Iron (Fe) | ≤ 5.0% |
| Carbon (C) | ≤ 0.10% |
| Manganese (Mn) | ≤ 0.50% |
| Silicon (Si) | ≤ 0.50% |
| Phosphorus (P) | ≤ 0.015% |
| Sulfur (S) | ≤ 0.015% |
| Aluminum (Al) | ≤ 0.40% |
| Titanium (Ti) | ≤ 0.40% |
Mechanical Properties
| Property | Annealed Condition |
|---|---|
| Tensile Strength (UTS) | ≥ 760 MPa |
| Yield Strength (0.2% Offset) | ≥ 345 MPa |
| Elongation | ≥ 30% |
| Reduction of Area | ≥ 60% |
| Hardness | ≤ 220 HB |
Product Specifications
Bolt Types
- Hex Head Bolts
- Socket Head Cap Screws
- Double End Studs
- Full Thread Studs
- U-Bolts
Nut Types
- Hex Nuts
- Hex Lock Nuts
- Flange Nuts
- Cap Nuts
- Round Nuts
Size Range
- Metric: M6 – M64
- Imperial / UNC / UNF: 1/4″ – 2-1/2″
Surface Finishes
- Annealed
- Solution Treated
- Passivated
- Electropolished
Compliance Standards
- ASTM B446 / B564
- ASME SB-446 / SB-564
- ISO 3506
- DIN / ANSI / JIS (upon request)
Typical Applications
| Industry | Applications |
|---|---|
| Aerospace | Engine components, exhaust systems, turbine structural parts |
| Petrochemical | Refining equipment, chemical reactors, pipeline flange connections |
| Marine Engineering | Desalination plants, offshore platforms, ship propulsion systems |
| Nuclear Power | Reactor pressure vessels, steam generators, cooling systems |
| Power Generation | Gas turbines, thermal boilers, flue gas desulfurization units |
| Medical | Medical implants, surgical instruments (specific grades) |
| LNG & Cryogenic | LNG carriers, liquid nitrogen storage tanks |
Special Application Guide
- Chloride Environments: Inconel 625 is recommended, outperforming stainless steel and standard alloy steels
- High Temperature & Pressure: Maximum service temperature 700°C; solution treated condition recommended
- Strong Acid & Alkali: Excellent resistance to nitric acid, phosphoric acid, sulfuric acid, and more
- Nuclear Radiation Environments: Low activation characteristics make it ideal for reactor internal fasteners
Quality Assurance
✓ Material Test Report (MTR / MTC) provided with every batch
✓ Third-party inspection reports available (SGS / BV / DNV)
✓ 100% dimensional inspection
✓ Ultrasonic Testing (UT) available upon request
✓ Salt spray test / intergranular corrosion test available upon request
Packaging & Shipping
- Standard export cartons with moisture-proof lining
- Reinforced wooden crating for bulk orders ✓ Clear marking, OEM custom packaging supported
- Stock items: 3-7 business days
- Custom production: 15-25 business days
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