Section 1: Product Overview
Inconel fasteners (bolts, nuts, studs, washers) are high-performance nickel-chromium alloy fasteners designed for extreme environments where superior corrosion resistance and high-temperature strength are required. Our Inconel fasteners meet ASTM F467, ASTM F468, and ASME B18.2.2 standards, making them the preferred choice for aerospace, chemical processing, marine, and power generation industries.
As a leading Inconel fastener manufacturer, we provide Inconel 625, 718, 600, 601, and X-750 grades in various fastener forms.
Section 2: Key Features
- Excellent corrosion resistance in oxidizing and reducing environments
- High strength at temperatures from cryogenic to 1000°F (540°C)
- Outstanding oxidation resistance at high temperatures
- Good resistance to pitting, crevice corrosion, and stress corrosion cracking
- ASTM F467/F468 certified manufacturing process
- Complete material test reports (MTR) provided
- Full size range from M6 to M72, 1/4″ to 3″
Section 3: Available Grades Overview
| Grade | UNS No. | Key Feature | Main Applications |
|---|---|---|---|
| Inconel 625 | N06625 | High strength + corrosion resistance | Aerospace, marine, chemical |
| Inconel 718 | N07718 | Precipitation hardening | Gas turbines, nuclear |
| Inconel 600 | N06600 | Heat resistant | Heat exchangers, furnace |
| Inconel X-750 | N07750 | High temperature spring | Rocket engines, springs |
Section 4: Chemical Composition (All Grades)
| Element | 625 | 718 | 600 | X-750 |
|---|---|---|---|---|
| Ni (Nickel) | ≥58.0 | 50-55 | ≥72 | ≥70 |
| Cr (Chromium) | 20.0-23.0 | 17-21 | 14-17 | 14-17 |
| Mo (Molybdenum) | 8.0-10.0 | 2.8-3.3 | – | – |
| Nb (Niobium) | 3.15-4.15 | 4.75-5.50 | – | 0.7-1.2 |
| Fe (Iron) | ≤5.0 | Bal | 6-10 | 5-9 |
| Al (Aluminum) | ≤0.4 | 0.2-1.0 | – | 0.7-1.2 |
| Ti (Titanium) | ≤0.4 | 0.65-1.15 | – | 2.25-2.75 |
| C (Carbon) | ≤0.10 | ≤0.08 | ≤0.15 | ≤0.08 |
| Mn (Manganese) | ≤0.50 | ≤0.35 | ≤1.0 | ≤1.0 |
| Si (Silicon) | ≤0.50 | ≤0.35 | ≤0.5 | ≤0.5 |
Section 5: Mechanical Properties (All Grades)
| Property | 625 | 718 | 600 | X-750 |
|---|---|---|---|---|
| Tensile Strength | ≥880 MPa | ≥965 MPa | ≥550 MPa | ≥896 MPa |
| Yield Strength | ≥330 MPa | ≥550 MPa | ≥240 MPa | ≥379 MPa |
| Elongation | ≥30% | ≥25% | ≥30% | ≥25% |
| Hardness | 95 HRB max | 100 HRB max | 95 HRB max | – |
| Proof Stress | – | ≥550 MPa | – | – |
Section 6: Product Types & Specifications
Available Fastener Types
| Type | Description | Standards |
|---|---|---|
| Hex Bolts | Hex head bolts, heavy hex bolts | ASTM F467, ASME B18.2.1 |
| ** Nuts** | Hex nuts, heavy hex nuts, jam nuts | ASTM F468, ASME B18.2.2 |
| Studs | Full thread studs, double end studs | ASTM F467 |
| Washers | Flat washers, lock washers | ASTM F436 |
| Screws | Socket head screws, machine screws | ASME B18.3 |
Size Range
| Parameter | Range |
|---|---|
| Diameter | M6 – M72, 1/4″ – 3″ |
| Length | 20mm – 500mm |
| Thread | Metric (ISO), UNC, UNF |
Applicable Standards
| Standard | Description |
|---|---|
| ASTM F467 | Nickel Alloy Nuts |
| ASTM F468 | Nickel Alloy Bolts |
| ASME B18.2.1 | Hex Bolts |
| ASME B18.2.2 | Nuts |
| ISO 3506 | Mechanical Properties |
Section 7: Applications by Grade
| Grade | Recommended Applications |
|---|---|
| 625 | Aerospace engine components, marine hardware, chemical processing equipment, pollution control, nuclear reactors |
| 718 | Gas turbine engines, rocket motors, high-temperature fasteners, nuclear reactors, springs |
| 600 | Heat exchangers, furnace components, steam generators, chemical containers |
| X-750 | Rocket engines, gas turbines, springs, high-temperature fasteners |
Section 8: Why Choose Us
- ISO 9001:2015 certified manufacturer
- Mill test certificates provided with every order
- Competitive pricing direct from factory
- Quick lead times – typically 2-3 weeks
- Full size range – M6 to M72
- Technical support – free material selection guidance
Section 9: FAQ
Q: What is the difference between Inconel 625 and 718 fasteners? A: Inconel 625 offers excellent general corrosion resistance and high strength. Inconel 718 provides superior high-temperature strength and is precipitation-hardenable.
Q: What are the standard sizes available? A: We provide fasteners from M6 to M72 (1/4″ to 3″) in various lengths. Custom sizes are also available.
Q: What certifications do you provide? A: We provide Mill Test Reports (MTR), ISO 9001 certification, and ASTM/ASME compliance certification.
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