Nimonic 80A Tube
Seamless Precipitation-Hardened Nickel-Chromium Superalloy Tube for Critical High-Temperature Service
Nimonic 80A seamless tube combines exceptional high-temperature strength, outstanding creep resistance, and superior fatigue performance. Engineered for demanding aerospace and industrial applications including engine ducting, heat exchanger tubing, and thermal protection systems operating continuously at temperatures to 700°C.
Quick Specifications
- Nickel Content
- 75% minimum (balance + Cr, Ti, Al, Co, Fe)
- Chromium Content
- 19-23%
- Titanium Content
- 2.0-2.6%
- Aluminium Content
- 1.0-1.8%
- Outside Diameter Range
- 6 mm to 100 mm
- Tensile Strength (Room Temp, Aged)
- 860-1000 MPa
Standards & Certifications
Product Description
Nimonic 80A tube is produced through vacuum induction melting followed by precision casting, hot piercing, and seamless tube drawing to achieve optimized microstructure throughout the tube wall. The seamless construction eliminates potential weak points associated with welded seams, providing superior reliability for pressure-containing and structural applications. Available in outside diameters from 6 mm to 100 mm with wall thicknesses tailored to specific application requirements.
The precipitation-hardened nickel-chromium structure provides exceptional sustained strength at elevated temperatures, with stress-rupture values exceeding 280 MPa at 700°C for 1000-hour life. The alloy exhibits outstanding oxidation resistance, with minimal scaling at service temperature due to the stable chromium oxide protective layer. Thermal cycling capability is exceptional, allowing thermal transients and thermal shock without loss of mechanical properties or integrity.
Nimonic 80A tube demonstrates superior fatigue strength even at elevated service temperatures, making it ideal for applications involving pressure cycling or vibration. The material's excellent ductility when aged ensures good damage tolerance and impact resistance, allowing components to withstand manufacturing and handling loads without brittle failure. The tube can be supplied in seamless form or with precision threading, grooves, or other specialized internal or external profiles.
Seamless Nimonic 80A tube continues to be the preferred material for critical aerospace thermal systems, industrial power generation heat exchangers, and specialized applications where reliability under extreme conditions is non-negotiable. The material's extensive design database, proven performance history in demanding service, and established manufacturing processes provide engineers with confidence in material selection for the most challenging applications.
Specifications
| Nickel Content | 75% minimum (balance + Cr, Ti, Al, Co, Fe) |
| Chromium Content | 19-23% |
| Titanium Content | 2.0-2.6% |
| Aluminium Content | 1.0-1.8% |
| Outside Diameter Range | 6 mm to 100 mm |
| Tensile Strength (Room Temp, Aged) | 860-1000 MPa |
| Yield Strength (0.2% offset, Aged) | 640-780 MPa |
| Elongation (Aged) | 12-18% |
| Stress Rupture (700°C, 1000h) | 280+ MPa |
| Burst Pressure Rating | Depends on wall thickness and diameter |
| Density | 8.19 g/cm³ |
| Maximum Continuous Temperature | 700°C |
Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 75.0 (min) |
| Chromium (Cr) | 19.0-23.0 |
| Cobalt (Co) | 0.8-1.5 |
| Titanium (Ti) | 2.0-2.6 |
| Aluminium (Al) | 1.0-1.8 |
| Iron (Fe) | 1.0 (max) |
| Manganese (Mn) | 1.0 (max) |
| Silicon (Si) | 1.0 (max) |
| Carbon (C) | 0.08 (max) |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (540°C, Aged) | 760-900 MPa |
| Tensile Strength (650°C, Aged) | 650-750 MPa |
| Yield Strength (540°C, 0.2% offset) | 520-640 MPa |
| Elongation (Aged, Room Temp) | 12-18% |
| Reduction of Area | 35-45% |
| Hardness (Aged, HV) | 380-420 |
| Modulus of Elasticity (Room Temp) | 214 GPa |
| Shear Strength (Room Temp) | 520-620 MPa |
| Fatigue Strength (10⁷ cycles, 650°C) | 340+ MPa |
Key Features & Advantages
Applications
Jet Engine Air Ducting and Heat Exchangers
Seamless Nimonic 80A tube provides reliable performance in engine air intake systems, thermal bypass ducts, and heat exchanger applications where sustained elevated temperatures and pressure cycling are combined with vibration and thermal transient loading.
Aerospace Thermal Management Systems
Applied in anti-ice systems, thermal conditioning lines, and specialized cooling circuits where the combination of high-temperature capability, pressure containment, and thermal cycling resistance ensures system integrity and performance.
Industrial Power Generation Heat Exchangers
Utilized for high-temperature heat exchanger tubing in industrial gas turbine systems where efficient heat transfer combined with extended operating temperature and superior creep resistance improves turbine efficiency and reliability.
Specialized Instrumentation Tubing
Employed for precision instrumentation and high-pressure tubing applications in aerospace and research applications where material reliability under extreme conditions and dimensional precision are critical requirements.
Military and Combat Aircraft Systems
Applied in military aircraft thermal management systems, afterburner ducting, and specialized applications where the material's combination of high-temperature strength and superior fatigue resistance ensures mission reliability.
Advanced Chemical Processing Equipment
Utilized in specialized high-temperature chemical processing applications where the combination of corrosion resistance, creep resistance, and thermal stability enable reliable operation in demanding process environments.
Frequently Asked Questions
Is Nimonic 80A tube seamless or welded?
What pressure ratings can Nimonic 80A tube withstand?
Can Nimonic 80A tube be bent or formed?
What surface conditions are available for Nimonic 80A tube?
How are Nimonic 80A tubes inspected and certified?
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