# Alloy R41 UNS N07041: Properties and Applications
## Introduction to Alloy R41 UNS N07041
Alloy R41, also known as UNS N07041, is a high-performance nickel-based superalloy designed for extreme environments. This material combines excellent mechanical properties with outstanding resistance to oxidation and corrosion, making it a preferred choice for demanding applications in aerospace, industrial gas turbines, and other high-temperature industries.
## Chemical Composition
The unique properties of Alloy R41 stem from its carefully balanced chemical composition:
– Nickel (Ni): 50-55%
– Chromium (Cr): 18-20%
– Cobalt (Co): 10-12%
– Molybdenum (Mo): 9-10.5%
– Titanium (Ti): 3-3.5%
– Aluminum (Al): 1.4-1.8%
– Iron (Fe): ≤5%
– Carbon (C): ≤0.08%
– Boron (B): ≤0.008%
– Zirconium (Zr): ≤0.07%
## Mechanical Properties
Alloy R41 exhibits impressive mechanical characteristics across a wide temperature range:
– Tensile Strength: 1,380 MPa (200 ksi) at room temperature
– Yield Strength: 830 MPa (120 ksi) at room temperature
– Elongation: 20% at room temperature
– Creep Resistance: Excellent performance up to 980°C (1,800°F)
– Fatigue Strength: Superior resistance to cyclic loading
## Physical Properties
The physical characteristics of Alloy R41 include:
– Density: 8.22 g/cm³ (0.297 lb/in³)
– Melting Range: 1,315-1,370°C (2,400-2,500°F)
– Thermal Conductivity: 11.2 W/m·K at 100°C
– Electrical Resistivity: 1.25 μΩ·m at 20°C
– Coefficient of Thermal Expansion: 12.6 μm/m·K (20-100°C)
## Heat Treatment
Proper heat treatment is crucial for optimizing Alloy R41’s properties:
– Solution Annealing: 1,095-1,120°C (2,000-2,050°F) followed by rapid cooling
– Aging Treatment: 760°C (1,400°F) for 16 hours, air cool
– Stress Relieving: 900°C (1,650°F) for 4 hours
## Corrosion Resistance
Alloy R41 offers exceptional resistance to various corrosive environments:
– Oxidation resistance up to 1,100°C (2,012°F)
– Excellent resistance to sulfidation and carburization
– Good performance in chloride-containing environments
– Resistance to hot corrosion in gas turbine applications
## Fabrication and Machining
Working with Alloy R41 requires specialized techniques:
– Hot Working: Performed between 1,040-1,200°C (1,900-2,200°F)
– Cold Working: Possible but requires intermediate annealing
– Machining: Requires rigid setups, sharp tools, and slow speeds
– Welding: Can be welded using matching filler metal and proper pre/post-weld heat treatment
## Applications of Alloy R41 UNS N07041
Alloy R41 finds use in numerous demanding applications:
### Aerospace Industry
– Turbine blades and vanes
– Combustion chambers
– Afterburner components
– Exhaust systems
### Power Generation
– Gas turbine components
– Combustion liners
– Transition ducts
Keyword: Alloy R41 UNS N07041
– Turbine disks
### Industrial Applications
– High-temperature fasteners
– Heat treatment fixtures
– Chemical processing equipment
– Nuclear reactor components
## Advantages of Alloy R41
The key benefits of using Alloy
