ASTM Nimonic 80A Rod For High Temperature Aerospace Components
Nimonic 80A Rod for High-Temperature Aerospace Components
Nimonic 80A rod is a wrought, age-hardenable nickel-chromium alloy strengthened by additions of titanium, aluminum, and carbon. Developed for service at temperatures up to 815°C (1500°F), it offers excellent mechanical properties, oxidation resistance, and structural stability under thermal stress. This makes Nimonic 80A rod suitable for demanding applications in aerospace, nuclear, automotive, and industrial sectors.
Chemical Composition of Nimonic 80A Rod
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 18.0–21.0 |
| Titanium (Ti) | 1.8–2.7 |
| Aluminum (Al) | 1.0–1.8 |
| Carbon (C) | ≤0.10 |
| Silicon (Si) | ≤1.0 |
| Copper (Cu) | ≤0.2 |
| Iron (Fe) | ≤3.0 |
| Manganese (Mn) | ≤1.0 |
| Cobalt (Co) | ≤2.0 |
| Boron (B) | ≤0.008 |
| Zirconium (Zr) | ≤0.15 |
| Sulfur (S) | ≤0.015 |
Mechanical Properties of Nimonic 80A Rod
| Condition | Ultimate Tensile Strength (MPa) |
|---|---|
| Annealed | 800–1000 |
| Annealed + Aged | 1200–1400 |
| Spring Temper | 1300–1500 |
| Spring Temper + Aged | 1500–1800 |
Physical Properties of Nimonic 80A Rod
| Property | Value |
|---|---|
| Density | 8.19 g/cm³ |
| Melting Range | 1320–1365°C |
| Coefficient of Thermal Expansion (20–100°C) | 12.7 µm/m·°C |
| Torsional Modulus | 85GPa |
| Thermal Conductivit | 11.2W/m •°C |
Standards and Specifications
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UNS N07080
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W.Nr. 2.4952 / 2.4631
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ASTM B637
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BS 3076 NA 20
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BS HR 1, HR 601
Applications of Nimonic 80A Rod
Nimonic 80A rods are utilized in various high-temperature applications, including:
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Gas turbine components (blades, rings, discs)
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Bolts and fasteners
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Nuclear boiler tube supports
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Die casting inserts and cores
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Automotive exhaust valves
Frequently Asked Questions
Q: What is the maximum operating temperature for Nimonic 80A rods?
A: Nimonic 80A rods are designed for service at temperatures up to 815°C (1500°F), maintaining mechanical strength and oxidation resistance.
Q: Can Nimonic 80A rods be welded?
A: Yes, Nimonic 80A rods can be welded using appropriate techniques, such as tungsten inert gas (TIG) welding, with recommended filler metals like Nimonic 90.
Q: Are Nimonic 80A rods suitable for nuclear applications?
A: Yes, due to their low cobalt content and high-temperature performance, Nimonic 80A rods are specified for certain nuclear applications.
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