Premium nickel-based superalloys engineered for exceptional creep strength and oxidation resistance in gas turbines, aerospace, and high-temperature industrial applications.
Nimonic alloys are a family of nickel-based superalloys originally developed by Wiggin Alloys (now Special Metals) for use in gas turbine engines. These precipitation-hardened alloys combine outstanding high-temperature strength with excellent creep resistance and oxidation resistance.
The Nimonic family ranges from the solid-solution-strengthened Nimonic 75 to the highly alloyed Nimonic 105, with each grade offering progressively higher temperature capability. Key alloying elements include chromium for oxidation resistance, titanium and aluminium for precipitation strengthening, and cobalt for enhanced creep strength.
FountainHead Alloys stocks Nimonic 75, 80A, 90, 105, and 263 in a comprehensive range of product forms, supported by full mill certification and third-party inspection.
Request a QuoteNimonic alloys supplied in all standard and custom product forms.
Hot rolled, forged & ground
Hot & cold rolled
Seamless & welded
Forged to ANSI/ASME
Bolts, nuts & studs
Cold drawn & annealed
| Ni | Cr | Fe | Ti | C | Mn | Si | Cu | S |
|---|---|---|---|---|---|---|---|---|
| 72.0 min | 18.0-21.0 | 5.0 max | 0.2-0.6 | 0.08-0.15 | 1.0 max | 1.0 max | 0.5 max | 0.015 max |
| Property | Value |
|---|---|
| Tensile Strength | 690 MPa min |
| Yield Strength (0.2%) | 210 MPa min |
| Elongation | 30% min |
| Hardness | ≤90 HRB |
| Property | Value |
|---|---|
| Density | 8.37 g/cm³ |
| Melting Range | 1340-1380 °C |
| Thermal Conductivity | 11.7 W/m·K |
| UNS | W.Nr | BS | ASTM | AMS | DIN |
|---|---|---|---|---|---|
| N06075 | 2.4951 | HR5 | B637 | 5751 | 17742 |
| Ni | Cr | Ti | Al | Fe | Co | C | Mn | Si | Cu | Zr | B | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 73.0 min | 18.0-21.0 | 1.8-2.7 | 1.0-1.8 | 3.0 max | 2.0 max | 0.10 max | 1.0 max | 1.0 max | 0.2 max | 0.15 max | 0.008 max | 0.015 max |
| Property | Value |
|---|---|
| Tensile Strength | 1000 MPa min |
| Yield Strength (0.2%) | 620 MPa min |
| Elongation | 20% min |
| Hardness | 250-350 HV |
| Property | Value |
|---|---|
| Density | 8.19 g/cm³ |
| Melting Range | 1320-1365 °C |
| Thermal Conductivity | 11.2 W/m·K |
| UNS | W.Nr | BS | ASTM | AMS | DIN |
|---|---|---|---|---|---|
| N07080 | 2.4952 | HR1 | B637 | 5544 | 17742 |
| Ni | Cr | Co | Ti | Al | Fe | C | Mn | Si | Cu | Zr | B | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 54.0 min | 18.0-21.0 | 15.0-21.0 | 2.0-3.0 | 1.0-2.0 | 5.0 max | 0.13 max | 1.0 max | 1.5 max | 0.2 max | 0.15 max | 0.02 max | 0.015 max |
| Property | Value |
|---|---|
| Tensile Strength | 1000 MPa min |
| Yield Strength (0.2%) | 620 MPa min |
| Elongation | 20% min |
| Hardness | 250-380 HV |
| Property | Value |
|---|---|
| Density | 8.18 g/cm³ |
| Melting Range | 1310-1370 °C |
| Thermal Conductivity | 11.5 W/m·K |
| UNS | W.Nr | BS | ASTM | AMS | DIN |
|---|---|---|---|---|---|
| N07090 | 2.4632 | HR1 | B637 | 5829 | 17742 |
| Ni | Cr | Co | Mo | Ti | Al | Fe | C | Mn | Si | Cu | Zr | B | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 51.0 min | 14.0-15.7 | 18.0-22.0 | 4.5-5.5 | 0.9-1.5 | 4.5-4.9 | 1.0 max | 0.12 max | 1.0 max | 1.0 max | 0.2 max | 0.15 max | 0.01 max | 0.015 max |
| Property | Value |
|---|---|
| Tensile Strength | 1030 MPa min |
| Yield Strength (0.2%) | 690 MPa min |
| Elongation | 16% min |
| Hardness | 280-400 HV |
| Property | Value |
|---|---|
| Density | 8.01 g/cm³ |
| Melting Range | 1290-1345 °C |
| Thermal Conductivity | 10.2 W/m·K |
| W.Nr | BS | DIN |
|---|---|---|
| 2.4634 | HR8 | 17742 |
| Ni | Cr | Co | Mo | Ti | Al | Fe | C | Mn | Si | Cu | B | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 49.0-56.0 | 19.0-21.0 | 19.0-21.0 | 5.6-6.1 | 1.9-2.4 | 0.6 max | 0.7 max | 0.04-0.08 | 0.6 max | 0.4 max | 0.2 max | 0.005 max | 0.007 max |
| Property | Value |
|---|---|
| Tensile Strength | 970 MPa min |
| Yield Strength (0.2%) | 550 MPa min |
| Elongation | 25% min |
| Hardness | 250-350 HV |
| Property | Value |
|---|---|
| Density | 8.36 g/cm³ |
| Melting Range | 1300-1355 °C |
| Thermal Conductivity | 11.7 W/m·K |
| UNS | W.Nr | ASTM | AMS | DIN |
|---|---|---|---|---|
| N07263 | 2.4650 | B637 | 5886 | 17742 |
Your trusted source for Nimonic superalloys with proven expertise and reliable supply.
Every Nimonic shipment includes full mill test certificates, EN 10204 3.1 documentation, and optional third-party inspection by agencies such as Lloyd's, TUV, or DNV.
Comprehensive inventory of Nimonic 75, 80A, 90, 105, and 263 in all major product forms. Ex-stock delivery from our Mumbai warehouse with global shipping capability.
Our metallurgical team provides grade selection guidance, equivalent cross-referencing, and application engineering support to ensure you get the right Nimonic alloy for your requirements.
Common questions about Nimonic alloys and their applications.
Both are precipitation-hardened nickel-chromium alloys with similar base strength levels. The key difference is Nimonic 90 contains 15-21% cobalt, giving it superior creep strength and stress-rupture life at temperatures above 750°C. Nimonic 80A has lower cobalt content and is more economical, making it the preferred choice for exhaust valves and bolting where extreme high-temperature creep life isn't critical. Nimonic 90 is favored for turbine blades and high-temperature springs.
Nimonic alloys are designed for high-temperature service, with maximum operating temperatures varying by grade: Nimonic 75 up to 750°C, Nimonic 80A up to 815°C, Nimonic 90 up to 920°C, Nimonic 105 up to 950°C, and Nimonic 263 up to 900°C. Their excellent creep strength and oxidation resistance at these temperatures make them essential for gas turbine components, exhaust systems, and thermal processing equipment.
No, although both are nickel-based superalloys. Nimonic alloys (developed by Wiggin Alloys/Special Metals) are specifically optimized for high-temperature creep strength and often contain significant cobalt additions. Inconel alloys are optimized for corrosion resistance and oxidation resistance. There is some overlap — for example, both families serve gas turbine applications — but Nimonic alloys are generally the first choice for turbine blades and discs where creep resistance is paramount, while Inconel excels in corrosive chemical environments.
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