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|
Grade |
W.Nr. |
UNS |
Nickel Alloys |
|
Nimonic 90 / Alloy 90 |
2.4632 / 2.4969 |
N07090 |
Nimonic 90 / Alloy 90 is an age-hardenable nickel superalloy that develops high strength through precipitation hardening and is especially noted for creep resistance, stress-rupture strength and mechanical stability at elevated temperatures. Its ability to retain shape and strength under long-term thermal exposure makes this grade more performance-oriented than standard nickel alloys. Machining requires controlled process conditions; welding and forming operations should also take heat treatment condition and section thickness into account.
|
Ni % |
Cr % |
C % |
S % |
Mn % |
Si % |
Ti % |
Al % |
Co % |
Cu % |
Fe % |
|
Balance |
18.00 – 21.00 |
0.13 max. |
0.015 max. |
1.00 max. |
1.00 max. |
2.00 – 3.00 |
1.00 – 2.00 |
15.00 – 21.00 |
0.20 max. |
1.50 max. |
Note: Limits for minor elements such as B, Zr, Pb and residual elements should be checked against the relevant producer datasheet, customer specification or order standard. The table above gives the principal alloying elements and common commercial analysis limits.
|
Product Form |
Rp0.2, MPa |
Rm, MPa |
Elongation [%] |
Hardness [HB] |
Density [g/cm3] |
|
Round Bar |
752 |
1175 |
30 |
≈ 240–335 HB* |
8.18 |
|
Plate |
≥ 685 |
≥ 1200 |
≥ 16.5 |
≈ 240–335 HB* |
|
|
Sheet |
831 |
1180 |
23 |
≈ 240–335 HB* |
* Note: For Nimonic 90, hardness values in aged condition are not always specified directly in HB; they are often given as HV. Therefore, the HB range shown is an approximate conversion. Round bar and sheet values are typical values; plate values are general datasheet minimum values. For ordering and inspection, the applicable AMS, BS, EN/AECMA standard or producer certificate should be checked.
|
Sector |
Products |
Why Nimonic 90 Is Used in These Products |
|
Aerospace and aircraft engines |
Turbine blades, turbine discs, hot-section jet engine components |
It provides creep resistance, stress-rupture strength and mechanical stability at high temperature, giving reliable performance under long-term load in hot engine sections. |
|
Gas turbines and power generation |
Gas turbine discs, ring sections, high-temperature forged parts |
Rotating components exposed to high temperature must retain their shape; Nimonic 90 maintains strength and dimensional stability well under these conditions. |
|
Hot-working tools and die sector |
Hot-forming tools, furnace carriers/fixture parts, high-temperature fixtures |
It is preferred where thermal cycling, hot contact and mechanical pressure require surface and core strength. It is more resistant to softening in hot environments. |
|
Automotive, motorsport and special exhaust systems |
Exhaust reheater parts, high-temperature engine fasteners, turbo/exhaust-line components |
|
|
Springs and fasteners |
High-temperature springs, spring wire, high-temperature fasteners |
Spring force and mechanical elasticity must be retained at elevated temperature; Nimonic 90 provides resistance to relaxation and deformation. |
|
Industrial furnace and heat-treatment equipment |
Furnace hangers/fixture parts, thermal-cycle-resistant fixtures, hot-environment carrier parts |
It reduces deformation risk under long-term high temperature, oxidation and load-bearing conditions, increasing the service life of furnace equipment. |
Nimonic 90 / Alloy 90 is an age-hardenable, creep-resistant nickel superalloy developed for service temperatures up to approximately 920°C. After solution treatment, the grade gains high strength through precipitation hardening / ageing; for example, round bar can reach approximately Rp0.2 752 MPa and Rm 1175 MPa at 20°C. The alloy is weldable; resistance welding, TIG and MIG can be applied particularly in sheet form. However, for sections above approximately 5 mm, the risk of microfissuring in the weld metal and heat-affected zone increases; welding should therefore be performed under controlled conditions, preferably on solution-treated material, and suitable post-weld heat treatment should be considered for optimum properties.
Nimonic 90, Alloy 90, W.Nr. 2.4632, W.Nr. 2.4969, NiCr20Co18Ti
|
Product Form |
ASTM / ASME |
AMS / SAE |
Most Common Other Spec |
|
Round Bar |
ASTM B637 / ASME SB-637 |
SAE AMS 5829 |
BS HR2, BS HR501, BS HR502, BS HR503, AECMA PrEN 2295 / 2296 / 2297 / 2400 / 2401 / 2669 / 2670 |
|
Plate |
— |
— |
BS HR202 / AECMA PrEN 2298 |
|
Sheet |
— |
— |
BS HR202 / AECMA PrEN 2298 |
Special Metals — NIMONIC® Alloy 90
Note: The information provided in this data sheet is for informational purposes only; no liability is accepted.
