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Shanghai COCESS Special Alloys Co., Ltd. is a specialized supplier of high-performance nickel-base and cobalt-base superalloys, providing Nimonic 80A (UNS N07080 / W.Nr. 2.4631 / 2.4952 / China GH4080A) in full product forms with strict metallurgical control and international certification support. Nimonic 80A is a γ′-precipitation hardenable Ni–Cr–Ti–Al alloy (Ni–19.5Cr–2.4Ti–1.4Al, Co ≤ 2.0%) originally developed for 650–815°C (1200–1500°F) creep-resistant turbine components, and remains specified for nuclear applications due to its low cobalt content (minimizing Co-60 activation). All material is supplied in solution-annealed or solution-annealed + aged condition with full traceability, PMI verification, and EN 10204 3.1 Mill Test Reports.
1. Grade Cross-Reference & Standards Compliance
|
System |
Designation |
|---|---|
|
UNS (USA) |
N07080 |
|
Trade Name |
Nimonic® 80A (orig. Wiggin / Rolls-Royce heritage) |
|
DIN / EN |
2.4631 / 2.4952 / NiCr20TiAl (DIN 17742) |
|
China (Aviation) |
GH4080A (GB/T 14992) |
|
BS (UK) |
BS HR 1 (Bar / Forging / Wire); BS HR 201; BS 3076 NA 20 |
|
ASTM / AMS |
ASTM B637; AMS 5768; AMS 5828 |
|
Other |
AFNOR NC 20TAl; ISO 683-7 |
All shipments from COCESS are controlled to these specifications unless otherwise agreed in the purchase order.
2. Chemical Composition (per BS HR 1 / ASTM B637)
Nimonic 80A derives its high-temperature strength from γ′ [Ni₃(Al,Ti)] precipitation, with low Co to suit nuclear environments.
|
Element |
Min % |
Max % |
Typical / Goal |
Function |
|---|---|---|---|---|
|
Nickel (Ni) |
Balance |
Balance |
~57–62 |
FCC γ matrix; γ′ former base |
|
Chromium (Cr) |
18.0 |
21.0 |
19.5 |
Cr₂O₃ scale (oxidation to ≈1040°C); γ stabilizer |
|
Titanium (Ti) |
1.8 |
2.7 |
2.3–2.4 |
Primary γ′ former (Ni₃Ti dominant) |
|
Aluminum (Al) |
1.0 |
1.8 |
1.4 |
Secondary γ′ former (Ni₃Al in solid solution) |
|
Cobalt (Co) |
— |
2.0 |
≤1.0 |
Key: Kept low to reduce neutron activation (Co-60) in nuclear use |
|
Carbon (C) |
0.04 |
0.10 |
0.06–0.08 |
M₂₃C₆ / TiC grain-boundary carbides |
|
Iron (Fe) |
— |
3.0 |
≤1.5 |
Impurity limit |
|
Manganese (Mn) |
— |
1.0 |
≤0.5 |
Deoxidant |
|
Silicon (Si) |
— |
1.0 |
≤0.2 |
— |
|
Sulfur (S) |
— |
0.015 |
≤0.008 |
— |
|
Boron (B) |
— |
0.008 |
0.003–0.005 |
Grain-boundary strengthener / creep improve |
|
(Al+Ti) total |
≈ 3.4–4.2 % |
— |
— |
Controls γ′ volume (~15–18%) |
3. Key Physical Properties (20°C, Solution-Annealed)
|
Property |
Value |
Note |
|---|---|---|
|
Density |
8.19 g/cm³ (0.296 lb/in³) |
— |
|
Melting Range |
1320–1365°C (2410–2490°F) |
Solidus ~1320°C |
|
Elastic Modulus (E) |
210–222 GPa @20°C; ~165 GPa @700°C |
— |
|
Mean CTE (20–100°C) |
12.7 × 10⁻⁶ /K |
20–800°C ≈ 15.8×10⁻⁶/K |
|
Thermal Conductivity |
11.2–11.5 W/m·K @20°C; ~24 W/m·K @800°C |
— |
|
Specific Heat (cp) |
~448 J/kg·K @20°C; ~650 J/kg·K @800°C |
— |
|
Electrical Resistivity |
~1.08–1.24 µΩ·m @20°C |
— |
|
Magnetic State |
Non-magnetic (FCC γ) at all service temps |
— |
4. Typical Mechanical Properties
Condition: Solution Annealed (SA, as-delivered for machining / pre-form)
Rm ≈ 800–1000 MPa
Rp0.2 ≈ 350–450 MPa
A₅₀ ≥ 30–40%
Hardness ≈ 150–200 HB (85–95 HRB)
Condition: SA + Aged (Typical: 1080°C × soak → oil/water quench + 700°C × 16 h / AC)
|
Property (RT) |
Typical Value |
Spec. Min (BS HR 1 / ASTM B637 ref.) |
|---|---|---|
|
Tensile Strength (Rm) |
1080–1200 MPa |
≥ 930–1000 MPa |
|
Yield Strength (Rp0.2) |
650–800 MPa |
≥ 620 MPa |
|
Elongation (A₅₀) |
15–25 % |
≥ 12–15 % |
|
Reduction of Area (Z) |
20–30 % |
— |
|
Hardness |
32–40 HRC (250–320 HB) |
— |
Elevated-Temperature Tensile (Aged — Typical):
|
Temp (°C) |
Rm (MPa) |
Rp0.2 (MPa) |
Elong. A₅₀ (%) |
|---|---|---|---|
|
20 |
1120–1180 |
700–780 |
18–25 |
|
650 |
900–970 |
560–630 |
15–21 |
|
750 |
720–790 |
450–510 |
14–20 |
|
815 |
560–630 |
350–410 |
12–18 |
|
870 |
430–490 |
270–320 |
11–16 |
Stress-Rupture (representative, not design allowables):
650°C / 415 MPa ≈ 100–300 h
750°C / 180 MPa ≈ 100–300 h
800°C / 150 MPa ≈ 500–1000 h (marginal for sustained design)
815°C / 105 MPa ≈ 50–100 h
5. Heat Treatment Practice
Solution Anneal (SA): 1050–1080°C (typ 1080°C) × soak per section (e.g. 8 h for bar) → oil or water quench (must retain γ′ solutes; γ′ solvus ≈ 950–970°C). Thin sections may air cool but oil/water preferred for full property.
Aging (Precipitation):
Single-stage (most common): 700°C × 16 h / AC
Double-stage (optional): 700–720°C × 16 h + 650°C × 8–16 h (refine γ′ size)
Over-aging Warning: > 950°C or prolonged 800–850°C exposure → η (Ni₃Ti) forms → strength decay.
Spring Temper: Cold-drawn wire + age (600–700°C) → UTS 1300–1500 MPa for valve springs.
6. Product Forms & Supply Scope (Shanghai COCESS)
|
Form |
Typical Size Range |
Condition |
Note |
|---|---|---|---|
|
Round Bar |
Φ8–Φ300 mm (black / rough turned / centerless ground h7/h9) |
Solution-annealed (SA) or SA+Aged |
Length 1000–6000 mm; cut-to-length |
|
Forging Billet / Block / Ring |
Custom (round / square / annular, OD up to 800 mm subject to ratio) |
As-forged + SA or SA only |
Near-net pre-forms available |
|
Plate / Sheet (limited / indent) |
Thk 6–40 mm (plate); 0.8–4.0 mm (sheet on indent) |
SA, descaled + pickled / bright |
Small-batch available |
|
Spring Wire / Precision Wire |
Φ0.3–Φ8.0 mm |
Annealed (soft) or Cold-Drawn + Aged (spring temper) |
UTS 1300–1600 MPa (aged) |
|
Welding Consumables |
Φ0.8 / 1.2 / 1.6 / 2.4 mm |
Bright cleaned |
Matching N07080 or ERNiCr-3 |
Custom services: saw / abrasive cut, rough machining, centerless grind, export VCI + wooden crate packing.
7. Typical Applications
|
Sector |
Component |
Why Nimonic 80A |
|---|---|---|
|
Aero / Industrial Gas Turbine |
Early-design turbine blades, vane segments, shrouds |
650–800°C creep adequate; legacy DWG lock |
|
High-Temp Springs & Fasteners |
Exhaust valve springs, lock rings, studs (≤ 400–600°C design) |
Age-hardenable; stress-relax resistance |
|
Automotive (High Perf.) |
Racing / aero-derived IC exhaust valves |
815°C intermittent + oxidation OK |
|
Nuclear Power |
Boiler tube supports, hanger springs, grid spacers |
Co ≤ 2% → low Co-60 neutron activation (key vs. Nimonic 90 / Inconel 718) |
|
MRO |
Legacy engine / industrial turbo parts to BS HR 1 / AMS 5768 |
Cert traceability critical |
8. Quality Assurance & Certification
Every shipment from Shanghai COCESS Special Alloys Co., Ltd. includes:
✅ EN 10204 3.1 MTR (Heat #, Chemistry with Ti/Al/Co, RT Tensile, Grain Size, HT Record)
✅ PMI Verification Report (XRF / OES — confirms Ni≈Bal., Cr≈19.5%, Ti≈2.3%, Al≈1.4%, Co≤2%)
✅ Dimensional Inspection Report
✅ UT / PT / MT (on forgings or as specified)
✅ CO / Invoice / Packing List
✅ Third-party witness (SGS / TÜV / BV) available on request
Materials are melted via VIM (+ ESR optional) for low S/P and tight chemistry control.
9. Why Source Nimonic 80A From Shanghai COCESS?
Technical Precision: Strict control of Al+Ti (γ′ potential) and Co (≤2%) for nuclear-grade compliance.
Flexible Supply: From prototype kg-quantities (wire/bar) to ton-level forgings; mixed-form packages.
Document Integrity: EN 10204 3.1 as standard; familiar with BS HR 1 / ASTM B637 / AMS submission.
Global Logistics: Export packing, seaworthy / airworthy; experience shipping to NA / EU / SEA / ME.
Complementary Alloys: We also supply Nimonic 90 (N07090), Nimonic 263 (N07263), Inconel 718/625, Hastelloy X, Haynes 188 — enabling multi-alloy sourcing from one partner.
10. Request a Quote
For project pricing, availability check, nuclear-grade low-Co certification, or technical clarification (heat treatment parameter recommendation, Nimonic 80A ↔ Nimonic 90 substitution evaluation), contact our sales desk:
Shanghai COCESS Special Alloys Co., Ltd.
Email: sales@cocessalloys.com
Web: https://en.cocessalloys.com
Add: Shanghai, China
All values in this article are typical; final conformance shall follow applicable ASTM / AMS / BS / GB standards and purchase order specifications. This page is for informational and sourcing purposes.
