Nickel Alloys Alloy 718 Fasteners Overview
Zeon Exports supplies Nickel Alloy 718 (Inconel, UNS N07718) fasteners – bolts, nuts and studs – a precipitation-hardening nickel-chromium superalloy with exceptionally high strength from cryogenic temperatures up to 704°C, for aerospace and oil & gas bolted joints.
Nickel Alloy 718 (Inconel) Fasteners secure high-temperature and high-pressure bolted connections in turbine engines and oil & gas equipment where standard fasteners lack sufficient strength. Its niobium-driven age hardening allows welding and forming before final precipitation treatment, giving exceptional strength and creep-rupture properties from cryogenic temperatures up to roughly 704°C without sacrificing weldability.
- Age-hardened via niobium, aluminum and titanium for very high strength
- Tensile ≥1241 MPa, yield ≥1034 MPa in the aged condition
- EN 10204 3.1 certified, export-ready worldwide
Quick Specifications of Nickel Alloys Alloy 718 Fasteners
Nickel Alloy 718 (Inconel) Fasteners are produced to internationally recognized bolting specifications.
| Field | Detail |
|---|---|
| Material/Grade | Nickel Alloy 718 (Inconel) |
| UNS | N07718 |
| DIN/Werkstoff Number | 2.4668 |
| Standards | ASTM B637, AMS 5662/5663 |
| Form | Bolts, Nuts, Studs |
| Finish | As specified (confirm on order) |
| Heat Treatment | Solution Treated + Aged (Precipitation Hardened) |
| Certification | EN 10204 3.1 |
Equivalent Grades of Alloy 718
Alloy 718 (Inconel 718) is recognized under several international designations below.
| UNS | DIN/Werkstoff Number | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|
| N07718 | 2.4668 | Inconel 718 | ASTM B637 |
Chemical Composition of Alloy 718
Composition per ASTM B637 for UNS N07718; exact limits can vary slightly by specification and heat.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 50.0 – 55.0 |
| Chromium (Cr) | 17.0 – 21.0 |
| Niobium + Tantalum (Nb+Ta) | 4.75 – 5.50 |
| Molybdenum (Mo) | 2.80 – 3.30 |
| Titanium (Ti) | 0.65 – 1.15 |
| Aluminum (Al) | 0.20 – 0.80 |
| Cobalt (Co), max | 1.00 |
| Manganese (Mn), max | 0.35 |
| Silicon (Si), max | 0.35 |
| Carbon (C), max | 0.08 |
| Copper (Cu), max | 0.30 |
| Iron (Fe) | Balance |
Physical Properties of Nickel Alloy 718 (Inconel)
Physical properties for Inconel 718, confirmed against manufacturer data.
| Property | Value |
|---|---|
| Density | 8.19 g/cm3 |
| Melting Range | 1260 – 1336°C |
| Magnetic Behaviour | Essentially non-magnetic (aged) |
Mechanical Properties of Nickel Alloys Alloy 718 Fasteners
Minimum mechanical properties for aged (precipitation-hardened) UNS N07718 per ASTM B637.
| Property | Minimum Value |
|---|---|
| Tensile Strength | 1241 MPa (180 ksi) |
| Yield Strength (0.2% offset) | 1034 MPa (150 ksi) |
| Elongation | 12% |
| Hardness | ~331 HB (35 HRC) typical |
| Condition | Solution Treated + Aged |
Corrosion Resistance of Nickel Alloy 718 (Inconel)
- Nickel Alloy 718 Fasteners combine corrosion resistance with the highest strength of the common nickel superalloys.
- Pitting and crevice resistance: chromium and molybdenum give strong resistance to pitting and crevice corrosion.
- Oxidation resistance: performs reliably in oxidizing atmospheres up to its service temperature ceiling.
- Sour-service resistance: API 6ACRA variants are qualified for NACE MR0175 sour oil & gas service.
Heat Resistance of Nickel Alloy 718 (Inconel)
Nickel Alloy 718 fasteners retain their strength up to roughly 704°C (1,300°F) and remain ductile and tough down to cryogenic temperatures. Strength drops sharply above roughly 650°C as strengthening precipitates transform. Always confirm exact service limits against the governing standard and application before specifying.
Key Properties of Nickel Alloys Alloy 718 Fasteners
Beyond corrosion and heat performance, Inconel 718 fasteners offer these additional properties.
- Highest strength of the common wrought nickel superalloys
- Excellent weldability with resistance to strain-age cracking
- Good creep-rupture strength at elevated temperatures
- Remains ductile and tough at cryogenic temperatures
Benefits of Nickel Alloys Alloy 718 Fasteners
Choosing Inconel 718 fasteners from Zeon Exports delivers measurable advantages for your project.
- Exceptional strength-to-weight ratio for critical bolted joints
- Full MTC 3.1 documentation for project QA/QC requirements
- Multiple sizes, threads and finishes to match exact project specs
- Reliable bulk supply with consistent ready stock
- Competitive export pricing for large industrial orders
- Fast dispatch to global project sites and ports
Related Products
Explore related Nickel Alloy products from Zeon Exports.
Request a Quote for Nickel Alloys Alloy 718 Fasteners
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Frequently Asked Questions About Nickel Alloys Alloy 718 Fasteners
Common questions about Nickel Alloy 718 (Inconel) Fasteners, answered below.
Q1: What is Nickel Alloy 718 (Inconel)?
Ans. Inconel 718 (UNS N07718) is a precipitation-hardening nickel-chromium superalloy strengthened by niobium, aluminum and titanium.
Q2: What standards do Inconel 718 fasteners meet?
Ans. Fasteners are manufactured to ASTM B637, certified to EN 10204 3.1 mill test certificates.
Q3: What is the maximum service temperature?
Ans. Inconel 718 retains its strength up to roughly 704°C (1,300°F); confirm the correct condition against your design code.
Q4: Is Inconel 718 magnetic?
Ans. Inconel 718 is essentially non-magnetic in the aged condition, being an austenitic nickel-based alloy.
Q5: Can Inconel 718 be welded?
Ans. Yes, its slow-forming niobium precipitate gives excellent weldability and resistance to strain-age cracking.
Q6: Is Inconel 718 suitable for sour-gas service?
Ans. Yes, API 6ACRA variants of Inconel 718 are qualified for NACE MR0175 sour oil & gas service.
Q7: What certification is provided with orders?
Ans. Every order ships with EN 10204 3.1 mill test certificates confirming grade, heat and dimensions.
Q8: Does Zeon Exports supply custom sizes?
Ans. Yes, fasteners are available in custom thread sizes and lengths on request for bulk industrial orders.
