1. Introduce
– Ni – Cr alloys with Mo additions
– Good yield strength and creep resistance at temperatures up to approximately 600°C
– Good oxidation resistance at temperatures below about 760°C
– UNS N09901
* Yield strength : stress that causes permanent deformation (plastic deformation) in tension
* Creep : When a material is subjected to a constant load above a certain temperature, the deformation of the material increases over time without an increase in load.
* UNS
- Abbreviation of Unified Numbering Systems for Metals and Alloys
- Unified 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
* 901 : N09901 : 09XXX : Fe & Cr (Precipitation – Hardenable)
(The last two or three digits of the six UNS numbers are used as the alloy model number)
* Incoloy
- Ni – Cr alloy designed to resist oxidation and carbonization at high temperatures
- A Ni – based superalloy (Ni – Fe – Cr) typically with large additions of Fe and Cr
- An alloy containing less than 50% Ni, with a higher content of Fe compared to Inconel (Ni – Cr – (Mo))
2. Property
– Excellent yield strength, creep resistance, and oxidation resistance
| Element | Impact |
|---|---|
| Ni | Provides yield strength (Increasing Ni content increases the usable temperature range) |
| Cr | Provides oxidation resistance, high temperature machinability |
| Mo | Provides high temperature strength |
[Incoloy 901 Chemical Composition (%)]
| Ni | Cr | Fe | C |
|---|---|---|---|
| 40.00 ~ 45.00 | 11.00 ~ 14.00 | 26.82 ~ 41.65 | Max. 0.10 |
| Al | Ti | Si | Mn |
|---|---|---|---|
| Max. 0.35 | 2.35 ~ 3.10 | Max. 0.60 | Max. 2.00 |
| Mo | S | Co | P |
|---|---|---|---|
| 5.00 ~ 7.00 | Max. 0.01 | Max. 1.00 | Max. 0.02 |
[Incoloy 901 Mechanical Properties]
| Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|
| Min. 1034 | Min. 689 | Min. 12.00 |
[Incoloy 901 Physical Properties]
| Density (g/cm³) | Melting Range (℃) | Specific Heat (0-100℃) / J/kg*℃ |
|---|---|---|
| 8.14 | 1280 ~ 1345 | 431 |
3. Standard & Specification
– Specification : UNS N09901
| Product Form | AMS |
|---|---|
| Rod, Bar, Wire, Forgings | 5660 |
4. Available Form
– Rod & Bar
– Tube & Pipe
– Fasteners
– Wire & Coil
– Forgings
5. Application & Product
– Aerospace, Automotive, Medical
| Application | Product |
|---|---|
| Aerospace | Engine Blades, Exhaust Ducts, Turbine Engine Disk |
| Automotive | Turbocharger housings |
| Medical | Implants |
(1) Engine Blades / (2) Turbocharger housings / (3) Turbine Engine Disk / (4) Implants
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