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UNS R30188 Material Specifications and Applications
UNS R30188 is a high-performance cobalt-based alloy known for its exceptional strength, corrosion resistance, and ability to withstand extreme temperatures. This material is widely used in industries that demand durability and reliability under harsh conditions.
Material Composition
The chemical composition of UNS R30188 includes:
- Cobalt (Co) – Primary base element
- Chromium (Cr) – 20-24%
- Nickel (Ni) – 9-11%
- Tungsten (W) – 14-16%
- Iron (Fe) – 3% max
- Carbon (C) – 0.05-0.15%
- Other trace elements
Key Properties
UNS R30188 exhibits several remarkable characteristics:
- Excellent high-temperature strength (up to 2000°F/1093°C)
- Outstanding oxidation and sulfidation resistance
- Good thermal fatigue resistance
- Superior corrosion resistance in various environments
- Maintains mechanical properties at elevated temperatures
Common Applications
Due to its unique properties, UNS R30188 finds applications in several demanding industries:
Aerospace Industry
Used in turbine blades, combustion chambers, and other high-temperature components of jet engines.
Power Generation
Employed in gas turbine components, burner nozzles, and other parts exposed to extreme heat.
Industrial Processing
Ideal for furnace components, heat treatment fixtures, and chemical processing equipment.
Medical Applications
Sometimes used in specialized surgical implants and dental applications due to its biocompatibility.
Fabrication and Machining
While UNS R30188 offers excellent performance characteristics, it presents some challenges in fabrication:
- Requires specialized welding techniques
- Machining is difficult due to work hardening
- Best results achieved with carbide tooling
- Annealing may be required between forming operations
Comparison with Similar Alloys
UNS R30188 compares favorably with other high-temperature alloys:
| Property | UNS R30188 | Inconel 718 | Hastelloy X |
|---|---|---|---|
| Max Service Temp | 2000°F (1093°C) | 1300°F (704°C) | 1800°F (982°C) |
| Oxidation Resistance | Excellent | Good | Very Good |
When selecting materials for extreme environments, UNS R30188 often proves to be the optimal choice for applications where other superalloys might fail.