A Nickel-Chromium-Cobalt alloy being precipitation hardenable, having high stress-rupture strength and creep resistance at high temperatures up to about 950°C (1740°F). It is widely used and a well proven alloy in high temperature conditions. Some typical applications for Nimonic® 90 include turbine blades, discs, forgings, ring sections, hot-working tools and other extreme environments.
Nimonic® 90 is also known as Superimphy 90, Pyromet 90, and Udimet 90.
Key Features
Nimonic® 90 offers the following key features:
High stress rupture strength and high creep resistance at high temperatures
Good resistance to high-temperature corrosion and oxidation
Age hardenable
High temperature dynamic applications
Designations
W.Nr 2.4632
W.Nr 2.4969
UNS N07090
AWS 030
Specifications
AMS 5829
BS HR 501
BS HR 502
BS HR 503
BS 3075 NA 19
ISO 15156
(NACE MR 0175)
NCK 20TA
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Ni | bal | |
| Cr | 18.00 | 21.00 |
| Fe | – | 1.50 |
| Ti | 2.00 | 3.00 |
| Mn | – | 1.0 |
| Si | – | 1.0 |
| C | – | 0.13 |
| Al | 1.00 | 2.00 |
| Co | 15.00 | 21.00 |
| S | – | 0.015 |
| Cu | – | 0.20 |
| B | – | 0.02 |
| Pb | – | 0.002 |
| Zr | – | 0.15 |
| Ag | – | 0.0005 |
| Bi | – | 0.0001 |
Alloy Details
Nimonic® 90 density, melting point, coefficient of expansion, modulus of rigidity, and elasticity is indicated in the table below:
| Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
|---|---|---|---|---|
| 8.19 g/cm³ | 1370 °C | 12.7 μm/m °C (20 – 100 °C) | 82.5 kN/mm² | 213 kN/mm² 227 / 240 kN/mm² |
| 0.296 lb/in³ | 2500 °F | 7.1 x 10-6 in/in °F (70 – 212 °F) | 11966 ksi | 30894 ksi 32924 / 34810 ksi |
Heat treatment of finished parts
The typical heat treatment of Nimonic® 90:
| Condition as supplied by AWI | Type | Temperature | Time | Cooling |
|---|---|---|---|---|
| Annealed | Age Harden | 750 °C (1380 °F) | 4 Hr | Air |
| Spring Temper | Age Harden | 650 °C (1200 °F) | 4 Hr | Air |
| Spring Temper | Age Harden | 600 °C (1110 °F) | 16 Hr | Air |
Properties
The typical mechanical properties of Nimonic® 90:
| Annealed | ||
|---|---|---|
| Approx. tensile strength | <1000 N/mm² | <145 ksi |
| Approx. operating temperature depending on load** and environment | – | – |
| Annealed + Aged | ||
|---|---|---|
| Approx. tensile strength | 1200 – 1400 N/mm² | 174 – 203 ksi |
| Approx. operating temperature depending on load** and environment | up to 550 °C | up to 1020 °F |
| Spring Temper | ||
|---|---|---|
| Approx. tensile strength | 1200 – 1500 N/mm² | 175 – 218 ksi |
| Approx. operating temperature depending on load** and environment | – | – |
| Spring Temper + Aged | ||
|---|---|---|
| Approx. tensile strength | 1500 – 1800 N/mm² | 218 – 261 ksi |
| Approx. operating temperature depending on load** and environment | up to 350 °C | up to 660 °F |
Our product range
Our company specializes in the export of high-performance nickel-based alloys and special metal materials, offering a product line that covers diverse industrial applications such as high-temperature, corrosion-resistant, and high-strength scenarios. Our core products include nickel-based superalloys like Hastelloy, Inconel, and Incoloy, as well as super austenitic stainless steels, duplex steels, Monel alloys, cobalt-based alloys, and precision alloy series. These materials deliver exceptional performance under extreme conditions-such as high temperatures, strong corrosion, and high pressure-and are widely used in aerospace, energy and chemical engineering, marine engineering, and high-end equipment manufacturing. We provide global clients with reliable material solutions and technical support.
Our factory
Our factory is equipped with an advanced system of production and testing equipment, enabling full-process manufacturing capabilities from smelting and hot working to precision finishing. At the core of production, we utilize vacuum induction melting (VIM) and electroslag remelting (ESR) furnaces to ensure high purity and uniform composition of alloy materials. We also employ multi-directional forging presses, precision rolling mills, and continuous annealing lines to achieve precise forming of plates, tubes, bars, and wires. Quality assurance relies on testing equipment such as direct-reading spectrometers, scanning electron microscopes (SEM), high-temperature mechanical testing machines, and corrosion test chambers, which rigorously monitor compositional structure, mechanical properties, and corrosion resistance. Adhering to international standards such as ISO, ASTM, and ASME, our factory implements an intelligent management and control system throughout the entire production process, delivering high-performance, traceable premium alloy products to our clients.
