# UNS R30605: Specifications and Applications
## Introduction to UNS R30605
UNS R30605 is a high-performance nickel-based alloy that belongs to the Hastelloy family of materials. This alloy is specifically designed to offer exceptional resistance to corrosion in various harsh environments, making it a preferred choice for demanding industrial applications.
## Chemical Composition
The chemical composition of UNS R30605 plays a crucial role in its performance characteristics:
Nickel (Ni): 58% minimum
Chromium (Cr): 20-23%
Molybdenum (Mo): 8-10%
Iron (Fe): 5% maximum
Cobalt (Co): 2.5% maximum
Other elements: Tungsten, carbon, manganese, silicon, phosphorus, sulfur in smaller quantities
## Mechanical Properties
Physical Properties
Density: 8.89 g/cm³
Melting Point: 1325-1370°C (2420-2500°F)
Mechanical Properties at Room Temperature
Tensile Strength: 690 MPa (100 ksi) minimum
Yield Strength: 310 MPa (45 ksi) minimum
Elongation: 40% minimum
## Key Characteristics
Why Choose UNS R30605?
This alloy offers several distinct advantages:
- Excellent resistance to pitting and crevice corrosion
- Superior performance in reducing and oxidizing environments
- Good resistance to stress corrosion cracking
- Maintains strength at elevated temperatures
- Excellent fabricability and weldability
## Industrial Applications
Where is UNS R30605 Used?
The unique properties of UNS R30605 make it suitable for various demanding applications:
Chemical Processing Industry
Reactors, heat exchangers, and piping systems handling aggressive chemicals
Pollution Control Equipment
Scrubbers, stack liners, and ducting for flue gas desulfurization systems
Pharmaceutical Industry
Keyword: uns r30605
Equipment requiring high purity and corrosion resistance
Marine Applications
Components exposed to seawater and marine atmospheres
Nuclear Industry
Waste processing equipment and other nuclear applications
## Fabrication Considerations
Working with UNS R30605
While UNS R30605 offers excellent fabricability, certain considerations should be noted:
Welding
Can be welded using common techniques like GTAW and GMAW
Matching filler metals recommended for optimal corrosion resistance
Machining
Requires slower speeds and heavier feeds than carbon steel
Use of sharp tools and positive rake angles recommended
Heat Treatment
Solution annealing at 1121-1177°C (2050-2150°F) followed by rapid cooling
## Conclusion
UNS R30605 stands out as a versatile nickel-based alloy that delivers exceptional performance in corrosive environments. Its combination of mechanical properties, corrosion resistance, and fabricability makes it an excellent choice for critical applications across multiple industries. When selecting materials for harsh operating conditions, UNS R30605 should be strongly considered for its proven reliability and long-term performance.