Nimonic 81
Aurico Alloys LLP: Premier Nimonic 81 sheets supplier, stockist & exporter in India to abroad.
Key Properties
- Chromium 30% nominal, well above the 18-21% of the 75 / 80A / 90 line, giving markedly better hot corrosion resistance.
- Titanium 1.8% and aluminium 0.9%, nominal — Special Metals publishes a nominal composition for this grade rather than limits.
- No UNS number is published for it. The identity table below records a dash, which is the correct published answer and not a gap.
- Supplied to mill specification in every form.
Applications
- Exhaust valves in high-sulphur fuel service
- Gas turbine hot-section hardware
- Components exposed to hot corrosion
Available Forms
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | — |
| Density | 8.06 g/cm3 |
| Melting range | 1305-1375 °C |
| Specific heat (20 °C) | 461 J/kg·°C |
| Thermal conductivity (20 °C) | 10.9 W/m·°C |
| Electrical resistivity (20 °C) | 1.27 µΩ·m |
| Coefficient of expansion (20-100 °C - extruded and stretched bar) | 11.1 µm/m·°C |
| Coefficient of expansion (20-100 °C - cold rolled sheet) | 11.7 µm/m·°C |
| Dynamic modulus of elasticity (20 °C - extruded bar) | 196 GPa |
| Dynamic modulus of elasticity (20 °C - sheet) | 212 GPa |
| Modulus of rigidity (20 °C - dynamic torsional) | 80 GPa |
Identifiers and physical constants for Nimonic 81. A dash means no such designation is published for this grade.
Specifications by Product Form
Nimonic 81 is supplied to a different standard in each form. Quote the one that matches the product you are ordering.
| Product form | Specification |
|---|---|
| Plate, sheet and strip | Mill specification |
| Rod and bar | Mill specification |
| Wire | Mill specification |
| Pipe and tube | Mill specification |
Aurico Alloys LLP supplies Nimonic 81 across all the forms above, with material test certificates (EN 10204 3.1) and export-ready packaging from Mumbai, India. Contact us for stock availability and pricing.