Alloy Wire International
Datasheet: Nimonic® 90
Nimonic® 90
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.
Available in all profile options
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^^
Typical Applications
Nimonic® 90 is known to be suitable for the following 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
The chemical composition of Nimonic® 90 is indicated in the table below:
| 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 |
The above tensile strength ranges are typical. If you require different please ask.
*Trade name of Special Metals Group of Companies ^^ Dynamic applications = active / lively / changing
