1. Introduce
– Ni-Cr alloy with age hardening properties
– Al and Ti are added to improve strength through precipitation hardening
– Maintains excellent corrosion resistance, oxidation resistance, tensile strength, and creep rupture strength up to 815°C
– UNS N07080
* Nimonic
- Ni-Cr alloy
- Excellent heat and oxidation resistance
- Alloy of Ni and Cr with trace amounts of Ti and Al
* Nimonic 75 vs Nimonic 80A
- high temperature strength : In general, Nimonic 80A provides higher strength compared to Nimonic 75 (especially for temperatures exceeding 1000℃)
- application
: Nimonic 80A is used in extreme environments where excellent high temperature strength and oxidation resistance is important
: Nimonic 75 is suitable for high temperature environments and is typically used in environments where the highest strength is not required
* UNS
- Abbreviation for Unified Numbering Systems for Metals and Alloys
- Unified unique numbering system for metals and alloys
- A representative number that is compatible with metals and alloys defined in many material-related codes such as ASTM, AISI, ASME, AWS, etc.
* N : Nickel and nickel alloys
* UNS N07080 : 07XXX : Chromium (Precipitation-hardenable alloy)
2. Property
– Excellent corrosion resistance, oxidation resistance, tensile strength, and creep fracture strength
| Element | Impact |
|---|---|
| Ni | Provides corrosion resistance |
| Cr | Provides corrosion resistance, oxidation resistance |
| Ti | Provides high temperature strength |
| Al | Provides high temperature strength, high temperature creep properties |
[Nimonic 80A Chemical Composition (%)]
| Ni | Cr | Fe | C | Al |
|---|---|---|---|---|
| 67.02 ~ 79.20 | 18.00 ~ 21.00 | Max. 3.00 | Max. 0.10 | 1.00 ~ 1.80 |
| Ti | Cu | Si | Mn | S |
|---|---|---|---|---|
| 1.80 ~ 2.70 | Max. 0.20 | Max. 1.00 | Max. 1.00 | Max. 0.02 |
| Co | Zr | B | ||
|---|---|---|---|---|
| Max. 2.00 | Max. 0.15 | Max. 0.01 |
[Nimonic 80A Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| Min. 930 | Min. 620 | 20 |
[Nimonic 80A Physical Properties]
| Density (g/cm³) | Melting Range (℃) |
|---|---|
| 8.19 | 1320 ~ 1365 |
3. Standard & Specification
– Specification : UNS N07080
| Product Form | BS | ASTM | AECMA |
|---|---|---|---|
| Rod, Bar, Wire, Forging Stock | 3076, HR1 | B637 | PrEn2188, PrEn2189, PrEn2190, PrEn2396, PrEn2397 |
| Plate, Sheet, Strip | HR201 | – | PrEn 2191 |
| Pipe, Tube | HR401 | – | – |
4. Available Form
– Rod, Bar, Wire, Forging Stock
– Plate, Sheet, Strip
– Pipe, Tube
5. Application & Product
– Aerospace, Marine, Automotive, Nuclear
| Application | Product |
|---|---|
| Aerospace | Turbine blades, Disks, Rings, Bolts |
| Marine | Exhaust pipes |
| Automotive | Exhaust valves |
| Nuclear | Boiler tube supports |
(1) Turbine Blade / (2) Disk / (3) Bolt
(4) Exhaust pipe / (5) Exhaust valve
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