Nimonic Wire: High-Temperature Superalloy for Extreme Performance (UNS N07080, ASTM B637)
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During a Middle East gas turbine overhaul, standard alloy blades fatigued prematurely under 800°C cyclic loads, risking blackout in a power plant serving millions. Such failures underscore the demand for Nimonic wire, a precipitation-hardened nickel superalloy designed for prolonged high-temperature service. Engineers in power generation, oil & gas, and OEM sectors specify Nimonic 80A wire (UNS N07080) to ensure reliability and longevity.
Specifications and Standards
Nimonic wire meets UNS N07080 (80A), ASTM B637 for bars/wire/forgings, DIN/EN 2.4631/2.4952 (NiCr20TiAl), BS HR601/3076NA20, and AECMA standards. These ensure creep resistance and oxidation protection up to 815°C for turbine and furnace components.
Fabricators benefit from compliance with MSRR 7095 and NACE for sour environments in oil & gas.
Specifications by Grade – Wire
A specification is written for a product form. The standards below are the ones that cover wire; the plate, bar and tube specifications for these grades are different documents and are listed on their own pages.
| Grade | UNS | Wire specification |
|---|---|---|
| 75 | N06075 | BS HR 5 / ISO 9723-25 |
| 80A | N07080 | ASTM B637 / BS 3076 / DIN EN 10269 |
| 81 | — | Mill specification |
| 86 | — | Mill specification |
| 90 | N07090 | AMS 5829 / BS HR 2 |
| 263 | N07263 | DIN 17753 |
| 901 | N09901 | AMS 5660 / 5661 |
Equivalent Grades
Key equivalents include Nimonic 75 (UNS N06075, 2.4951), Nimonic 90 (UNS N07090, 2.4632), Nimonic 263 (UNS N07263, 2.4650), with AFNOR NC20TA and Werkstoff 2.4952. Higher grades like Nimonic 105 (2.4634) offer enhanced creep strength.
Product Forms and Availability
Available as round wire (0.5mm to 6mm+ dia), coils, straight lengths, spring, and shaped wire for blades and fasteners. Precision tolerances support OEM prototyping; for load-bearing parts, pair with Nimonic hex bar.
Chemical Composition
| Element | Nimonic 80A (%) |
|---|---|
| Nickel | Balance |
| Chromium | 18-21 |
| Aluminum | 1.0-1.8 |
| Titanium | 1.8-2.7 |
| Iron | ≤3.0 |
| Cobalt | ≤2.0 |
| Carbon | 0.04-0.10 |
| Manganese | ≤1.0 |
Precipitation elements Al/Ti enable age-hardening for superior strength.
Mechanical and Physical Properties
In age-hardened condition: UTS 960 MPa, yield 760 MPa, elongation 20%, hardness 300 HV. Density 8.19 g/cm³, melting point ~1340°C, thermal conductivity 11.2 W/m·K, expansion 12.7 µm/m°C.
Maintains properties to 815°C, outperforming standard alloys in creep-fatigue.
Applications by Industry
Power Generation
Gas/steam turbine blades, rotors, nozzles resist oxidation/creep; nickel alloys hold ~40% turbine market share.
Oil & Gas
Downhole tools, refineries endure heat/corrosion better than SS.
Chemical Processing and Marine
Furnace muffles, exhaust valves; superior to carbon steels in sulfidation.
Pharma and OEM
High-purity process equipment; weldable for custom fabrications.
Nimonic 80A vs. Common Alternatives
| Property | Nimonic 80A | Inconel 718 | Inconel 625 | SS 310 |
|---|---|---|---|---|
| UTS (MPa) | 960 | 1240 | 770 | 515 |
| Max Temp (°C) | 815 | 700 | 980 | 1150 |
| Creep Strength | Excellent | Good | Moderate | Poor |
| Oxidation Resistance | Good | Excellent | Superior | Fair |
Select Nimonic for cost-optimized turbine apps; Inconel 718 for cryo-strength.
EEAT: Quality Assurance and Compliance
Mill certificates EN 10204/3.1, ultrasonic/PMI testing, ISO/AS9100 compliance; export docs from Mumbai hubs ensure seamless global delivery. Nickel alloy market grows at 5.6% CAGR through 2032.
Frequently Asked Questions
What standards apply to Nimonic wire?
Nimonic 80A wire follows UNS N07080, ASTM B637, DIN 2.4631, BS HR601/3076, AECMA PrEn2190. These validate high-temp strength, oxidation resistance for gas turbines, power plants, ensuring OEM reliability in extreme conditions. (51 words)
What are Nimonic wire's main properties?
Age-hardened: UTS 960 MPa, yield 760 MPa, 20% elongation, 8.19 g/cm³ density, service to 815°C. Excels in creep, thermal fatigue for oil & gas tools, turbine components over conventional alloys. (47 words)
Which industries use Nimonic wire?
Power generation (turbines), oil & gas (drilling), chemical (furnaces), marine/pharma (valves). Preferred for superior creep/oxidation vs SS; demand surges with energy transitions. (45 words)
Can Nimonic wire be welded?
Yes, with matching fillers (e.g., 2.4648); age after welding. Suits fabricators for turbine repairs; solution anneal 1050-1100°C, age 700-750°C. (42 words)
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Nimonic wire (UNS N07080, ASTM B637) provides battle-tested high-temperature performance, rigorous certifications, and testing, instilling procurement confidence across power, oil & gas, and manufacturing. Ready to specify Nimonic wire for your high-stakes application?