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Premium Nimonic 90 (UNS N07090) bar, plate supplier. High-temperature nickel alloy for aerospace, chemical processing. ASTM/ASME compliant. Get quote.
Hangbo Alloy Group provides premium Nimonic 90 (Alloy 90) superalloy products, including high-temperature round bars, forging rings, and spring wire. Below is the technical profile for Nimonic 90:
Detailed Introduction to Nimonic 90
Nimonic 90 (UNS N07090) is a precipitation-hardenable nickel-chromium-cobalt base superalloy. It is specially designed for service at high temperatures, offering high stress-rupture strength and creep resistance at temperatures up to about 920°C (1688°F). The addition of cobalt provides excellent resistance to oxidation and hot corrosion, making it a critical material for aircraft gas turbines and high-performance automotive engines.
Key Standards: BS HR 2, HR 202, ASTM B637 (Bar), DIN 2.4632.
Chemical Composition of Nimonic 90 (UNS N07090)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Remainder |
| Chromium (Cr) | 18.0 - 21.0 |
| Cobalt (Co) | 15.0 - 21.0 |
| Titanium (Ti) | 2.0 - 3.0 |
| Aluminum (Al) | 1.0 - 2.0 |
| Iron (Fe) | 1.5 max |
| Carbon (C) | 0.13 max |
Mechanical Properties (Aged Condition)
| Property | Typical Value at 20°C |
|---|---|
| Tensile Strength | 1100 - 1300 MPa |
| Yield Strength (0.2% Offset) | 750 - 950 MPa |
| Elongation | 15% - 25% |
| Hardness (Brinell) | 250 - 350 HB |
Material Characteristics
- High Temperature Strength: Retains significant mechanical integrity at temperatures exceeding 900°C.
- Excellent Creep Resistance: Suitable for long-term stress-bearing applications in hot engine sections.
- Oxidation Resistance: High chromium and cobalt content form a stable, protective scale at high temperatures.
- Fatigue Performance: Superior low-cycle and thermal fatigue resistance under engine cycling.
Common Applications of Nimonic 90
- Aerospace: Turbine blades, discs, and high-temperature fasteners in jet engines.
- Automotive: Exhaust valves and turbocharger components for racing and high-performance vehicles.
- Industrial: Tools for hot working of metals and high-temperature springs.
- Nuclear: Structural components in high-temperature reactor zones.
Pros & Cons of Nimonic 90
| Pros | Cons |
|---|---|
| Exceptional creep-rupture life at very high temperatures. | High cost due to significant cobalt content. |
| Very good resistance to hot corrosion and sulfidation. | More difficult to machine than Nimonic 80A. |
| Predictable performance in cyclic thermal environments. | Requires multi-stage aging heat treatment for optimal properties. |
Frequently Asked Questions (FAQ)
Q: What makes Nimonic 90 better than Nimonic 80A?
A: Nimonic 90 contains cobalt, which significantly improves its high-temperature strength and oxidation resistance compared to the cobalt-free Nimonic 80A.
Q: Can Nimonic 90 be welded?
A: Yes, but specialized procedures are required. It is best welded in the solution-treated condition, followed by post-weld aging.
Internal Links:
Nimonic 80A - The Baseline Superalloy
Inconel X-750 - Alternative High-Temperature Spring Alloy
Nimonic 90 vs Nimonic 75 - Full Comparison Guide
Inconel 718 vs Nimonic 90 - Aerospace Turbine Technical Comparison
Production Process
Our Nimonic 90 is manufactured using **VIM + VAR** melting for maximum purity and grain structure control. Material undergoes multi-stage solution treatment (typically 1080°C) followed by aging (700°C) to achieve the target gamma-prime precipitation.
Testing & Inspection
- Stress Rupture Test: Verification of creep-life at 815°C/925°C.
- Grain Size Verification: Compliance with aerospace standards (ASTM E112).
- NDT Testing: Ultrasonic and fluorescent penetrant inspection for crack-free delivery.
Quality Control
Complies with **AMS 5708, BS HR 2**, and relevant ISO aerospace standards. Certificates for chemical and mechanical properties are provided for all aerospace-grade batches.
Product Forms & Standards Comparison
| Product Form | Main Standard | Typical Range |
|---|---|---|
| Round Bar | ASTM B637 / AMS 5708 | Φ5mm - Φ300mm |
| Forging Ring | BS HR 202 | Custom Drawings |
| Spring Wire | AMS 5829 | Φ0.5mm - Φ12mm |
