Nimonic 80A
Fasteners
Manufacturer · Mumbai
Why Precipitation Hardening Genuinely Matters Here
A solid-solution-strengthened nickel alloy relies mainly on its base composition — chromium, molybdenum, and similar elements dissolved into the nickel matrix — for strength and corrosion resistance. That approach works well for a wide range of service conditions, but it isn’t the strategy that gives an alloy the highest possible strength retention specifically at sustained high temperature.
Nimonic 80A takes a genuinely different approach — titanium and aluminum are added specifically so that, during controlled heat treatment, they combine with nickel to precipitate a fine, evenly dispersed gamma-prime phase (Ni3(Ti,Al)) throughout the alloy’s microstructure. That precipitate physically blocks the movement of dislocations within the metal, which is the actual mechanism giving the alloy its high strength at temperature — not a side effect, but the deliberate purpose of the alloy’s design.
That’s exactly why Nimonic 80A became one of the foundational fastener alloys for early gas turbine engine development — turbine bolting needs to hold clamping load reliably at sustained high temperature and vibration, conditions where a solid-solution alloy alone would gradually lose strength faster than a properly heat-treated precipitation-hardened alloy does.
Akbar Fasteners Pvt. Ltd. exports to over 50 countries, and our Nimonic 80A fastener range is verified by chemical composition and mechanical testing under our ISO 9001:2015 quality system.
Where This Material Genuinely Applies
Genuine High-Temperature Strength Retention
Gamma-prime precipitation hardening gives real mechanical strength at sustained elevated temperature.
Correct Choice for Turbine-Grade Bolting
A proven, historically established alloy for gas turbine engine fastener applications.
Genuine Vibration & Fatigue Resistance
Precipitation-hardened microstructure supports reliable performance under combined heat and vibration.
Verified Composition & Mechanical Properties
Batch testing confirms genuine Ti/Al content and heat-treated mechanical properties for every lot.
Solid-Solution vs Precipitation-Hardened Superalloys
Incoloy 800HT
Strength and creep resistance come primarily from controlled base composition, not precipitation hardening. Genuinely different mechanism, different service profile.
View Incoloy 800HT →Nimonic 80A (This Page)
Strength comes deliberately from gamma-prime precipitation formed by titanium and aluminum during heat treatment — a genuinely different design strategy.
You Are HereInconel 718
Another precipitation-hardened superalloy, using a different gamma-double-prime mechanism for even higher strength in demanding aerospace service.
View Inconel 718 →Nimonic 80A vs Inconel 718 — Quick Reference
Both are precipitation-hardened, but the underlying strengthening phase and typical service profile genuinely differ. This table is the quick reference we use with buyers before quoting.
| Aspect | Nimonic 80A | Inconel 718 |
|---|---|---|
| Strengthening Phase | Gamma-prime (Ni3(Ti,Al)) | Gamma-double-prime (Ni3Nb) |
| Historical Use | Early gas turbine bolting | Modern aerospace & high-strength fastening |
| Typical Service Temperature | High, turbine-relevant | High, broader aerospace range |
| Relative Strength | Strong for its era and class | Generally higher overall strength |
Nimonic 80A Specification Details
Nominal Composition
- Nickel Balance (~74%)
- Chromium ~19–21%
- Titanium ~1.8–2.7%
- Aluminum ~1.0–1.8%
Typical Mechanical Range (Heat Treated)
- Tensile Strength ~1000 MPa Min
- Yield Strength ~630 MPa Min
- Service Temperature Up to ~815°C
- Elongation 20% Min
Fastener Types We Manufacture
- Bolts & Studs Hex, Precision Aerospace
- Nuts Hex, Self-Locking
- Washers Flat, Spring
- Custom Sizes On Request
Application Areas
Wherever sustained high-temperature strength retention under vibration genuinely matters.
Gas Turbine Engine Fastening
and structural fasteners
Aero-Engine Combustion Section
exposed structural fastening
Industrial Gas Turbine Equipment
fastening applications
Exhaust System Components
structural fastening
High-Temperature Springs & Fasteners
sustained spring-back force at heat
Aerospace Structural Assembly
high-temperature aerospace fastening
Turbocharger & Turbine Housing
and vibration exposure
General High-Temperature Turbine Assembly
requiring precipitation-hardened strength
Standard Export Documentation
Prepared as standard practice for every Nimonic 80A fastener shipment.
Mill Test Certificate (MTC)
Heat number, chemical composition, and mechanical property verification for every lot.
Chemical Composition Report
Confirms actual titanium and aluminum content fall within the specified Nimonic 80A range.
Certificate of Conformance
Confirms the shipment matches the purchase order grade/size specification in full.
Certificate of Origin (COO)
Confirms India as country of manufacture for destination customs purposes.
NABL Accredited Test Reports
Independent mechanical, dimensional, and high-temperature testing available on request.
Commercial Invoice & Packing List
Itemized value, Incoterm, and detailed carton/weight breakdown for customs clearance.
Internationally Recognised Standards Coverage
Related Fastener Grades & Materials
Inconel 718
Our higher-strength precipitation-hardened superalloy for demanding modern aerospace service.
View Inconel 718 Guide →Incoloy 800HT
Our creep-resistant, solid-solution-strengthened alloy for sustained furnace-level heat.
View Incoloy 800HT Guide →Inconel 625 Properties
Our nickel-chromium-molybdenum superalloy reference, corrosion-focused rather than precipitation-hardened.
View Inconel 625 Guide →High-Nickel Alloy Fasteners
Our broader specialty nickel alloy manufacturing capability across all major grades.
View High-Nickel Guide →Turbine-Grade Strength
at Sustained High Heat
Tell us your actual service temperature and vibration exposure — we’ll confirm whether Nimonic 80A genuinely fits or whether a related grade is a better match, and quote with full documentation. Akbar Fasteners Pvt. Ltd. responds within 24 hours.
Sales: +91 724 0000 733 · Support: +91 800 9315 333 · sales@akbarfasteners.in