Materials · Nickel alloys
Nimonic 80A fasteners
HAGUE FASTENERS makes Nimonic 80A fasteners to order: bolts, studs, nuts and machined parts in Nimonic 80A (UNS N07080), made to your drawing from certified, traceable bar. A precipitation hardening nickel-chromium alloy for high temperature bolting.
1000 MPa
Typical tensile strength, solution treated and aged
620 MPa
Typical yield strength (0.2% offset)
815°C
Creep rupture properties to 1500°F
UNS N07080
Also W.Nr. 2.4952 and BS 3076 NA20
About the alloy
Nickel alloy bolting for heat
HAGUE FASTENERS makes Nimonic 80A fasteners in the UK for turbines, power plant and engines. Nimonic 80A is a precipitation hardenable nickel-chromium alloy with additions of aluminium and titanium, with good corrosion and oxidation resistance and high tensile and creep rupture properties at temperatures to 1500°F (815°C).
It is a long established material for high temperature bolts, where it holds its clamp load at temperatures that would let alloy steel bolts relax. Although it sits with our stainless steels, it is a nickel alloy; see also our Inconel alloys.
At a glance
- Precipitation hardening nickel-chromium alloy
- Aluminium and titanium strengthened
- High creep rupture strength
- Good oxidation resistance
Chemical composition
Nimonic 80A chemical composition
Weight %. Other elements: Al 1.00 / 1.80, B 0.008 max., Zr 0.15 max..
| Element | Min % | Max % |
|---|---|---|
| Ni | Bal. | – |
| Cr | 18.00 | 21.00 |
| Ti | 1.80 | 2.70 |
| Mn | – | 1.00 |
| Fe | – | 3.00 |
| Si | – | 1.00 |
| C | – | 0.10 |
| Pb | – | 0.0025 |
| S | – | 0.015 |
| Co | – | 2.00 |
| Cu | – | 0.20 |
Mechanical properties
Nimonic 80A mechanical properties
Condition: typical, solution annealed and precipitation treated (aged).
| Property | Value |
|---|---|
| Tensile strength (MPa) | 1000 |
| Yield strength (0.2% offset) (MPa) | 620 |
| Elongation in 2 in (50 mm) or 4D (%) | 20 min. |
| Reduction of area (%) | 12 min. |
| Hardness | 300 HV min. |
These figures are for general information only and may change without notice. We believe them to be accurate, but HAGUE FASTENERS LIMITED gives no warranty and accepts no liability for their accuracy or completeness. Actual properties may vary, and nothing here guarantees the material for a particular use.
Applications
Where Nimonic 80A is used
Nimonic 80A is used for gas turbine components such as blades, rings and discs, bolts, tube supports in nuclear steam generators, die casting inserts and cores, and exhaust valves in internal combustion engines.
- Steam and gas turbine bolting
- Gas turbine blades, rings and discs
- Nuclear steam generator tube supports
- Engine exhaust valves
Designations
Alternative designations and specifications
UNS N07080 2.4952 2.4631 BS3076 NA20 BS2 HR1 Alloy 80A BS 3076 HR1 ASTM B 637 AECMA PrEn2188 AECMA PrEn2189 AECMA PrEn 2190 AECMA PrEn 2396 AECMA PrEn2397 AIR 9165-37
What we make
Nimonic 80A fasteners and components
Made to your drawing or to the standard you specify.
Certification and testing
Certified, traceable and tested
Nimonic 80A bar comes from approved UK, EU or US mills with heat traceability to release. We supply EN 10204 3.1 or 3.2 certificates, PMI where specified and independent UKAS-accredited testing. Heat treatment is by approved partners, with furnace charts on request. See quality and testing.
Questions
Frequently asked questions
What are Nimonic 80A fasteners used for?
Nimonic 80A fasteners are used for high temperature bolting in steam and gas turbines, power plant and engines, where they keep their strength and resist creep.
Is Nimonic 80A a stainless steel?
No. Nimonic 80A is a nickel-chromium alloy, not a stainless steel, although it is often supplied alongside stainless grades.
How is Nimonic 80A heat treated?
It is solution treated and then precipitation treated (aged). We arrange this through audited, approved heat treatment partners, with furnace charts on request.
What is the equivalent of Nimonic 80A?
Nimonic 80A is also known as Alloy 80A, UNS N07080 and W.Nr. 2.4952, and is covered by BS 3076 NA20 and ASTM B 637.
Nimonic 80A enquiry?
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