Nimonic 80A Forgings (UNS N07080)

Custom open-die forgings and seamless rolled rings to ASTM B637 / AMS 5872 / AMS 5766.
30 kg – 30,000 kg per piece  ·  OD up to 3,000 mm  ·  EN 10204 3.2 MTC available  ·  ISO 9001 since 1997

Last reviewed: April 2026

Jiangsu Liangyi Co., Limited (established 1997, Jiangyin, Jiangsu, China) is an ISO 9001:2015 certified manufacturer of Nimonic 80A forgings (UNS N07080 / Alloy 80A) supplying gas turbine bolts manufacturers, steam turbine company, and power generation companies in Germany, the USA, South Korea, Saudi Arabia, and 50+ countries. Annual forging capacity: 120,000 tonnes. All Nimonic 80A forgings are produced in-house from VIM/ESR or VIM/VAR melt through to EN 10204 3.1/3.2 certified delivery.

What Is Nimonic 80A — and When Should You Specify It?

Nimonic 80A (UNS N07080, also called Alloy 80A) is a precipitation-hardening nickel-chromium superalloy strengthened by coherent γ' precipitates (Ni₃(Al,Ti)). It was originally developed in the UK for first-stage gas turbine blades in the 1940s and remains one of the most widely specified alloys for rotating components that must hold their strength at continuous service temperatures up to 815 °C (1,500 °F).

We have been forging Nimonic 80A at our Jiangyin facility since 2003. In our experience, the alloy is more demanding to forge than Inconel 625 or 718: the working temperature window is narrower, and if billet temperature drops below approximately 950 °C during pressing, you risk adiabatic shear banding. The tradeoff is worth it — when correctly processed, Nimonic 80A offers a creep-rupture strength at 815 °C that Inconel 718 simply cannot match.

The most demanding application for Nimonic 80A forgings is the turbine disc and blisk (blade-integrated disc). In a gas or steam turbine, the disc must simultaneously resist centrifugal stress at the rim — where blade attachment loads are highest — and creep deformation at the bore, which runs hotter over long operating cycles. Nimonic 80A's combination of high proof strength (Rp0.2 ≥ 600 MPa) and superior creep-rupture life at 750–815 °C makes it one of the few alloys that can meet both requirements in a single forging without a bimetallic design.

We produce Nimonic 80A turbine discs by open-die forging from VIM/ESR ingot, with a minimum forging ratio of 5:1 to break down the as-cast structure and develop a uniform fine grain. For blisk pre-forms — where the disc and blade stubs are forged in one piece — we use closed-die tooling developed to the customer's 3D drawing. Grain size control across the disc cross-section is validated by metallographic coupon from each production heat.

Product Range and Dimensional Capabilities

We manufacture Nimonic 80A forgings to customer drawings in any of the forms below. All dimensions are ok for us — the ranges listed below is our main size that we could produce.

Seamless Rolled Rings

Produced on our 5-metre radial-axial ring rolling mill. Uniform grain flow in the circumferential direction makes seamless rings the preferred form for turbine casing rings, seal rings, flanges, and any application where through-wall hoop stress is the design-limiting load.

• Outer diameter: 50 mm – 3,000 mm
• Height: 20 mm – 800 mm
• Wall thickness: 20 mm minimum (thinner walls available in smaller diameters, subject to review)
• Profiles: plain rectangular cross-section standard; contoured rings (L, T, U cross-section) available
• Typical applications: turbine casing segments, labyrinth seal rings, retaining rings, flanged rings for pressure vessels

Open-Die Forged Bars and Billets

• Round bar: 20 mm – 800 mm diameter, any length up to press capacity
• Flat/rectangular bar: custom cross-sections, including turbine blade flat bars for blade pre-forms
• Hollow bars / thick-walled cylinders: wall thickness 30 mm minimum
• Billets and blocks: for machining into discs, hubs, and other custom shapes as per clients drawing

Turbine and Valve Components

• Turbine discs (forged near-net shape to drawing)
• Exhaust valve heads and stems (motorsport and industrial engine grades)
• Boiler tube support hangers and brackets
• Forged bolt blanks and stud blanks — we supply the forged round bar in the correct diameter and length; threading is done by your machining shop or we can arrange

We accept 2D drawings (DWG, PDF) and 3D files (STEP, IGES, DXF). If you have only a rough specification and no drawing yet, our engineering team can give our forging production plan, allowance, and weight — email us.

Melt Routes, Forging and Heat Treatment — How We Do It

Step 1: Melting — VIM/ESR or VIM/VAR

All our Nimonic 80A starts as a vacuum-induction melt (VIM). VIM allows precise chemistry control, particularly for the reactive elements aluminium and titanium that form the γ' strengthening phase — you cannot achieve tight Ti+Al balance in air or AOD melting.

After VIM, the electrode is remelted by one of two routes depending on the application:

Step 2: Forging

The ingot is homogenised at 1,120 °C before primary breakdown. We use our 6,300-tonne hydraulic forging press for initial open-die reduction, targeting a minimum forging ratio of 5:1 for critical parts (higher for nuclear specifications). Intermediate reheats are controlled to ±10 °C using calibrated furnace instrumentation — furnace calibration records are available for customer review upon request.

For seamless rings, the pre-formed ring blank is transferred hot from the press to the ring roller. The rolling schedule (number of passes, reduction per pass, final temperature) is defined in our forging procedure document and is part of the quality record for each order.

Step 3: Heat Treatment (Three-Stage Cycle)

Nimonic 80A must go through a precise three-stage heat treatment to develop the γ' precipitates that give it its creep strength. We do not offer the alloy in the solution-annealed-only condition for load-bearing applications.

All heat treatment is done in electrically heated, atmosphere-controlled furnaces with calibrated type-K thermocouples. Heat treatment charts (time–temperature records) are issued with each EN 10204 3.1/3.2 certificate.

Chemical Composition

Our Nimonic 80A chemistry conforms to ASTM B637 / UNS N07080 and EN 2904. The table below shows the standard limits alongside our typical aim chemistry — we aim tighter than the standard to reduce batch-to-batch variation in mechanical properties.

Note: Ti+Al (gamma-prime formers) sum is controlled to 3.3 – 4.1% for consistent γ' volume fraction. Full chemical analysis is performed by OES (optical emission spectrometry) on every heat; XRF is used for in-process checks. Certificates show heat-specific chemistry, not nominal values.

Mechanical Properties

The table below shows specification minimums per ASTM B637 and AMS 5872, alongside our typical results from production records for forgings in the 50–500 kg range (all values at room temperature unless stated).

Mechanical test results are reported on the MTC for each heat and forging lot. We can provide witness testing at our facility or arrange third-party laboratory testing (SGS, Intertek, TÜV) at customer request. Elevated-temperature creep testing requires advance notice — typical turnaround 8–12 weeks.

Quality Control and Non-Destructive Testing

Every Nimonic 80A forging we ship goes through the following inspection sequence. We do not offer to skip any step.

Certificates and Traceability

• EN 10204 3.1 — standard with all orders; signed by our QA department
• EN 10204 3.2 — available for all orders; third-party signatory options include TÜV SÜD, Bureau Veritas, SGS, Lloyd's Register. Please specify at inquiry stage as the inspector must be booked in advance.
• Each forging is marked with heat number, piece number, alloy designation, and our factory code — traceable from raw material purchase order to final certificate.
• We retain inspection records for 10 years and can reissue documentation if originals are lost.

ISO and Regulatory Compliance

• ISO 9001:2015 — quality management system, certified by DNV
• EU PED 2014/68/EU — for pressure equipment destined for European markets
• ASME BPVC applicable sections — we have supplied N-Stamp projects; please enquire
• API 6A — for oil and gas wellhead components
• Export control — all nickel superalloy exports comply with applicable ECCN classifications; we prepare all required export documentation

Applications and Project References

Below are three representative projects we can discuss in detail under NDA. We have deliberately included more technical context than a typical supplier case study, because we think that is what an engineer evaluating a supplier actually wants to know.

We can provide additional references — including MTC samples and third-party inspection reports — under NDA for qualified procurement enquiries. Contact us to arrange.

Other industries where our Nimonic 80A forgings are used

• Motorsport: High-performance exhaust valves — Nimonic 80A is a long-established choice for naturally-aspirated and turbocharged race engines operating above 7,500 RPM at valve temperatures exceeding 750 °C. We supply valve blanks in bar form to machining shops.
• Aerospace ground support: Test rig components and bearing housings for aero-engine test facilities
• Petrochemical: Reactor internals and heat exchanger flanges for high-temperature reformer services
• Marine / Naval: Exhaust system components for high-speed diesel and gas turbine vessel propulsion

Nimonic 80A vs. Inconel 718 vs. Nimonic C-263 vs. Hastelloy C-276

This comparison uses published data from ASTM standards, AMS specifications, and the open technical literature. We supply all four alloys as forgings — this table is designed to help you select the right material, not to promote any particular one.

Creep data sourced from High-Temperature Alloys for Gas Turbines (Brunetaud et al.) and individual AMS specification data sheets. Values are indicative; always verify with your specific heat test certificates. View all nickel alloys we supply →

Frequently Asked Questions

Can you match a tighter chemistry than ASTM B637 requires for Nimonic 80A?

Jiangsu Liangyi routinely produces Nimonic 80A (UNS N07080 / Alloy 80A) forgings to tighter chemistry limits than ASTM B637 requires — for example, S ≤ 0.003% (vs. B637's 0.015% max) and Pb ≤ 0.0008% for nuclear and aerospace customers. Please include your chemistry requirements in your RFQ. Very tight limits may require additional heat-selection testing and will affect pricing and lead time.

What is the minimum trial order for Nimonic 80A forgings, and how long does a sample take?

Jiangsu Liangyi has no minimum order quantity for Nimonic 80A (N07080 forged bar, seamless ring, or disc) — a single piece can be produced for testing quality. For a single bar or ring in a standard size, a rush sample  ships within 15 working days from drawing approval. Standard sample lead time is 20 working days.

Do you hold stock of Nimonic 80A billet or bar?

Jiangsu Liangyi normally carries a small stock of VIM/ESR Nimonic 80A billet (typically 200–400 mm round, 200–1,000 kg pieces) to reduce lead time for small bar and ring orders. Stock levels vary — contact us with your size and quantity and we will confirm availability immediately. All production forgings are produced as per all clients drawing.

What is the difference between VIM/ESR and VIM/VAR melt routes for Nimonic 80A, and when do I need to specify each?

For Nimonic 80A (Alloy 80A / UNS N07080), VIM/ESR (electro-slag remelting) is the standard melt route — it removes sulphide inclusions and improves transverse toughness, and is suitable for most gas turbine, steam turbine, fastener, and pressure vessel applications. VIM/VAR (vacuum arc remelting) produces even lower inclusion counts and is required for nuclear components under ASME BPVC Section III and some aerospace life-critical parts. At Jiangsu Liangyi, VIM/VAR typically adds 15–25% to material cost and 5–7 working days to lead time.

Can Jiangsu Liangyi supply Nimonic 80A forgings in a finish-machined condition?

Jiangsu Liangyi has in-house turning, boring, and milling capacity for Nimonic 80A forgings. Parts can be supplied in any of: rough forged (with machining allowance to drawing), rough turned (round/ring to close diameter), or finish machined (to final drawing dimensions). For complex machined shapes, please share drawings at quotation stage so we can confirm our capability.

My drawing need for EN 10204 3.2 with TÜV sign-off on the Nimonic 80A MTC — can you arrange this?

Yes, Jiangsu Liangyi works with TÜV SÜD, Bureau Veritas, SGS, and Lloyd's Register for EN 10204 3.2 certification of Nimonic 80A forgings. The inspector must be arranged in advance — please specify 3.2 and your preferred inspection body at inquiry stage. Standing inspection agreements are in place with all four bodies at our Jiangyin facility.

We need witness testing at your Jiangyin facility — is that possible?

Yes. Customers may send their own inspector or a nominated third-party inspector to the Jiangsu Liangyi facility in Jiangyin, Jiangsu during any stage of Nimonic 80A forging production. A details quality production plan is provided during witness visits. Please coordinate at least 2 weeks in advance. Live video witness of heat treatment and mechanical testing is also available for customers who cannot come to our workshop.

How does Jiangsu Liangyi handle rejected or nonconforming Nimonic 80A forgings?

If a Nimonic 80A forging fails any inspection criterion, Jiangsu Liangyi stops the process, formally documents the nonconformance, and initiates a disposition (scrap or rework). Nonconforming parts are never shipped and customers are never asked to accept deviations without written approval. If the failure is attributable to our process, Jiangsu Liangyi bears the cost of replacement. Our nonconformance rate for Nimonic 80A has averaged below 1.2% over the past five years (internal QA data).

What other nickel superalloys does Jiangsu Liangyi supply as forgings?

In addition to Nimonic 80A (UNS N07080 / ASTM B637 Nimonic 80A), Jiangsu Liangyi supplies a full range of nickel superalloy forgings: Nimonic C-263, Nimonic 90, Nimonic 105, Inconel 718, Inconel 625, Waspaloy, Monel 400 / K500, Hastelloy C-276 / C-22, Incoloy 825, and A-286. See our full materials page for the complete list.

Related Nickel Alloy Forgings

If Nimonic 80A does not fully match your requirements, these alternatives may be worth reviewing:

• Nimonic C-263 (UNS N07263) — better creep strength above 850 °C; higher cobalt content increases cost; good choice for combustion liners and turbine discs in newer high-temperature designs
• Inconel 718 (UNS N07718) — higher room-temperature UTS; better fatigue life; preferred for aeroengine discs and shafts below 700 °C service temperature
• Monel K500 — for marine and chemical environments where corrosion resistance is primary; much lower service temperature
• Hastelloy C-276 (UNS N10276) — outstanding aqueous corrosion resistance; used in chemical processing, FGD, and offshore where the environment, not temperature strength, is the primary design driver

→ View all 40+ alloy grades we supply as forgings

Downloads

• Nimonic 80A Technical Datasheet (PDF) — chemistry, mechanical properties, heat treatment parameters, physical properties (density, thermal conductivity, expansion coefficient)
• ISO 9001:2015 Certificate (PDF)
• Sample EN 10204 3.1 Mill Test Certificate — Nimonic 80A OD 75 mm Forged Bars (PDF) — real certificate No. 02005179, showing actual chemistry, mechanical test results and NDE sign-off

Nimonic 80A Physical Properties

The following physical properties apply to Nimonic 80A (UNS N07080 / Alloy 80A) in the fully heat-treated condition (solution annealed + stabilised + precipitation hardened). Values are at room temperature unless stated.

Physical property values sourced from published Nimonic alloy datasheets and EN 2904. Properties may vary slightly by heat and heat treatment cycle; consult your specific MTC for material-specific values.

Compliance and Regulatory Standards

Our Nimonic 80A forgings can be supplied to the following standards — specify which you need at quotation stage: ASTM B637 (primary forging standard), AMS 5872 (bars, forgings — Class A VIM/VAR or Class B VIM/ESR), AMS 5766 (rings), EN 2904 (European aerospace), ASME BPVC (pressure vessel and nuclear), EU PED 2014/68/EU (European pressure equipment), API 6A (oil and gas wellhead). We can also work to customer-proprietary material specifications — please include your spec with the RFQ.

Global Supply and Delivery

Jiangsu Liangyi regularly exports Nimonic 80A forgings (UNS N07080 / Alloy 80A / N07080 forged bar / ASTM B637 Nimonic 80A) to customers in the following countries and regions:

All export documentation — commercial invoice, packing list, certificate of origin, ECCN classification, and MTC — is prepared in-house. We have experience with customs requirements for nickel superalloy imports in the EU, USA, and South Korea.

Request a Quotation for Nimonic 80A Forgings

To receive an accurate quotation, we need: (1) a drawing or dimensional sketch, (2) material specification / standard, (3) quantity and required delivery date, (4) certificate requirements (3.1 / 3.2, inspection body). If you do not have a drawing yet, a description of the part and its application is enough to start a conversation.

We reply within 24 hours on business days.