Nickel Alloys Alloy X750 Fasteners Overview
Zeon Exports supplies Nickel Alloy X750 (Inconel, UNS N07750) fasteners – bolts, nuts and studs – a precipitation-hardening nickel-chromium superalloy with excellent creep-rupture strength and relaxation resistance at elevated temperatures up to 700°C.
Nickel Alloy X750 (Inconel) Fasteners secure high-temperature, high-stress bolted connections in gas turbines, rocket engines and nuclear reactors. Its aluminum and titanium age-hardening gives outstanding creep-rupture strength and relaxation resistance from cryogenic temperatures up to roughly 700°C, making it the standard choice for high-temperature springs and bolting.
- Age-hardened via aluminum and titanium for high strength and creep resistance
- Typical tensile 1103–1241 MPa, yield 758–900 MPa (single-aged)
- EN 10204 3.1 certified, export-ready worldwide
Quick Specifications of Nickel Alloys Alloy X750 Fasteners
Nickel Alloy X750 (Inconel) Fasteners are produced to internationally recognized bolting specifications.
| Field | Detail |
|---|---|
| Material/Grade | Nickel Alloy X750 (Inconel) |
| UNS | N07750 |
| DIN/Werkstoff Number | 2.4669 |
| Standards | ASTM B637, AMS 5670/5671 |
| Form | Bolts, Nuts, Studs |
| Finish | As specified (confirm on order) |
| Heat Treatment | Solution Treated + Aged (per AMS condition) |
| Certification | EN 10204 3.1 |
Equivalent Grades of Alloy X750
Alloy X750 (Inconel X-750) is recognized under several international designations below.
| UNS | DIN/Werkstoff Number | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|
| N07750 | 2.4669 | Inconel X-750 | ASTM B637 |
Chemical Composition of Alloy X750
Composition per ASTM B637 for UNS N07750; exact limits can vary slightly by specification and heat.
| Element | Composition (%) |
|---|---|
| Nickel (Ni), min | 70.0 |
| Chromium (Cr) | 14.0 – 17.0 |
| Iron (Fe) | 5.0 – 9.0 |
| Titanium (Ti) | 2.25 – 2.75 |
| Aluminum (Al) | 0.40 – 1.00 |
| Niobium (Nb), incl. Ta | 0.70 – 1.20 |
| Manganese (Mn), max | 1.00 |
| Silicon (Si), max | 0.50 |
| Copper (Cu), max | 0.50 |
| Carbon (C), max | 0.08 |
| Sulphur (S), max | 0.01 |
Physical Properties of Nickel Alloy X750 (Inconel)
Typical physical properties for X750; confirm exact heat-specific figures against the mill test certificate.
| Property | Value |
|---|---|
| Density | ~8.28 g/cm3 (typical) |
| Melting Range | ~1393 – 1427°C (typical) |
| Magnetic Behaviour | Essentially non-magnetic |
Mechanical Properties of Nickel Alloys Alloy X750 Fasteners
Typical mechanical properties by AMS condition for UNS N07750; exact minimums vary by heat-treatment condition and size – confirm on order.
| Property | Single-Aged (AMS 5667) |
|---|---|
| Tensile Strength | 1103 – 1241 MPa |
| Yield Strength (0.2% offset) | 758 – 900 MPa |
| Elongation | 18 – 22% |
| Condition | Solution Treated + Aged |
Corrosion Resistance of Nickel Alloy X750 (Inconel)
- Nickel Alloy X750 Fasteners combine corrosion resistance with excellent high-temperature relaxation resistance.
- Oxidation resistance: forms a stable protective oxide layer well suited to gas turbine and aerospace environments.
- Pitting and crevice resistance: chromium content gives good general corrosion resistance in mild aqueous environments.
- Nuclear service: widely qualified for reactor internals given its low relaxation under sustained load.
Heat Resistance of Nickel Alloy X750 (Inconel)
Nickel Alloy X750 fasteners perform reliably in high-strength structural service up to roughly 700°C (1,300°F), with oxidation resistance extending to considerably higher temperatures for lower-stress applications. Confirm the correct AMS heat treatment condition and exact service limits against the governing standard before specifying.
Key Properties of Nickel Alloys Alloy X750 Fasteners
Beyond corrosion and heat performance, X750 fasteners offer these additional properties.
- Outstanding resistance to relaxation under sustained load at temperature
- High creep-rupture strength at elevated temperatures
- Good fatigue strength for spring and turbine blade applications
- Remains ductile and tough at cryogenic temperatures
Benefits of Nickel Alloys Alloy X750 Fasteners
Choosing X750 fasteners from Zeon Exports delivers measurable advantages for your project.
- Industry-standard choice for high-temperature springs and bolting
- 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
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Request a Quote for Nickel Alloys Alloy X750 Fasteners
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Frequently Asked Questions About Nickel Alloys Alloy X750 Fasteners
Common questions about Nickel Alloy X750 (Inconel) Fasteners, answered below.
Q1: What is Nickel Alloy X750 (Inconel)?
Ans. Inconel X-750 (UNS N07750) is a precipitation-hardening nickel-chromium superalloy strengthened by aluminum and titanium.
Q2: What standards do X750 fasteners meet?
Ans. Fasteners are manufactured to ASTM B637 / AMS 5670/5671, certified to EN 10204 3.1 mill test certificates.
Q3: What is the maximum service temperature?
Ans. X750 performs reliably in high-strength service up to roughly 700°C (1,300°F); confirm the correct condition against your design code.
Q4: Is X750 magnetic?
Ans. X750 is essentially non-magnetic, being an austenitic nickel-chromium alloy.
Q5: Why is X750 used for high-temperature springs?
Ans. X750 has excellent resistance to relaxation under sustained load and temperature, making it a standard choice for high-temperature springs and bolting.
Q6: Is X750 used in nuclear reactors?
Ans. Yes, X750 is widely qualified for nuclear reactor internals due to its low relaxation under sustained load.
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.
