# UNS R30605: Specifications and Applications
## Introduction to UNS R30605
UNS R30605 is a high-performance nickel-based alloy known for its exceptional resistance to oxidation and corrosion at elevated temperatures. This alloy falls under the category of superalloys, which are designed to withstand extreme environments while maintaining structural integrity.
## Chemical Composition
The chemical composition of UNS R30605 plays a crucial role in its performance characteristics:
– Nickel (Ni): 58% minimum
– Chromium (Cr): 20-23%
– Iron (Fe): ≤5.0%
– Cobalt (Co): ≤2.0%
– Manganese (Mn): ≤1.0%
Keyword: uns r30605
– Silicon (Si): ≤1.0%
– Carbon (C): ≤0.10%
– Aluminum (Al): ≤0.40%
– Titanium (Ti): ≤0.40%
– Copper (Cu): ≤0.50%
## Mechanical Properties
UNS R30605 exhibits impressive mechanical properties across various temperature ranges:
– Tensile Strength: 90-120 ksi (620-830 MPa)
– Yield Strength: 35-60 ksi (240-415 MPa)
– Elongation: 30-50%
– Hardness: 150-200 HB
## Physical Properties
Key physical characteristics of UNS R30605 include:
– Density: 8.19 g/cm³ (0.296 lb/in³)
– Melting Range: 1325-1370°C (2420-2500°F)
– Thermal Conductivity: 11.4 W/m·K (at 100°C)
– Electrical Resistivity: 1.28 μΩ·m
## Heat Treatment
Proper heat treatment enhances the properties of UNS R30605:
– Solution Annealing: 1095-1205°C (2000-2200°F) followed by rapid cooling
– Stress Relieving: 870-900°C (1600-1650°F) for 1 hour per inch of thickness
## Applications
UNS R30605 finds extensive use in demanding industrial applications:
### Aerospace Industry
– Turbine engine components
– Combustion chambers
– Afterburner parts
### Chemical Processing
– High-temperature reactors
– Heat exchangers
– Furnace components
### Power Generation
– Gas turbine components
– Heat recovery systems
– Boiler parts
## Advantages of UNS R30605
The alloy offers several distinct advantages:
– Excellent oxidation resistance up to 1200°C (2200°F)
– Good creep rupture strength
– Resistance to carburization and sulfidation
– Maintains strength at elevated temperatures
– Good fabricability and weldability
## Fabrication Considerations
When working with UNS R30605:
– Use low heat input when welding
– Employ post-weld heat treatment for critical applications
– Machining requires rigid setups and sharp tools
– Forming should be done at elevated temperatures for complex shapes
## Corrosion Resistance
UNS R30605 demonstrates outstanding corrosion resistance in various environments:
– Excellent resistance to oxidizing atmospheres
– Good performance in reducing environments
– Resistance to chloride ion stress corrosion cracking
– Withstands carburizing and sulfidizing conditions
## Comparison with Similar Alloys
Compared to other nickel-based alloys:
– Higher chromium content than Inconel 600 for better oxidation resistance
– Similar to Hastelloy X but with different balance of alloying elements
– More cost-effective than some cobalt-based superalloys for certain applications
## Standards and Specifications
UNS R30605 conforms to various industry standards:
– ASTM B435 – Sheet, strip, and plate
– ASTM B572 – Welded pipe
– AMS 5536 – Sheet, strip, and plate
– ASME SB-435 – Pressure vessel applications
