# Stainless Steel Grade UNS R30605: Properties and Applications
## Introduction to UNS R30605
Stainless steel grade UNS R30605, also known as Alloy 600, is a nickel-chromium alloy that offers excellent resistance to high temperatures and corrosion. This material is widely used in various industries due to its unique combination of mechanical properties and chemical resistance.
## Chemical Composition
The chemical composition of UNS R30605 plays a crucial role in its performance characteristics:
Nickel (Ni): 72% minimum
Chromium (Cr): 14-17%
Iron (Fe): 6-10%
Carbon (C): 0.15% maximum
Manganese (Mn): 1.0% maximum
Sulfur (S): 0.015% maximum
Silicon (Si): 0.5% maximum
Copper (Cu): 0.5% maximum
## Mechanical Properties
Keyword: uns r30605
UNS R30605 exhibits impressive mechanical properties that make it suitable for demanding applications:
Tensile Strength
Room temperature: 550-760 MPa
Elevated temperature: Maintains strength up to 1093°C (2000°F)
Yield Strength
Room temperature: 240-550 MPa
Elongation
30-55% in 50 mm (2 in.)
## Physical Properties
Density: 8.47 g/cm³ (0.306 lb/in³)
Melting Range: 1354-1413°C (2470-2580°F)
Thermal Conductivity: 14.9 W/m·K at 100°C
Electrical Resistivity: 1.03 μΩ·m at 20°C
## Corrosion Resistance
UNS R30605 offers excellent resistance to:
– Oxidation at high temperatures
– Chloride stress corrosion cracking
– Corrosion by hot gases
– Many organic and inorganic compounds
## Heat Treatment
The alloy can be annealed at temperatures between 871-982°C (1600-1800°F) followed by rapid cooling to achieve optimal properties.
## Applications
Aerospace Industry
Used in jet engine components, exhaust systems, and combustion chambers
Chemical Processing
Ideal for heat exchangers, reaction vessels, and piping systems
Nuclear Power
Employed in steam generator tubing and reactor components
Heat Treating
Used for furnace muffles, retorts, and baskets
Food Processing
Suitable for equipment handling corrosive food products
## Fabrication and Welding
UNS R30605 can be fabricated using standard techniques:
– Hot working between 871-1177°C (1600-2150°F)
– Cold working with intermediate annealing
– Welding using matching filler metals (ERNiCr-3)
## Advantages Over Other Alloys
1. Superior resistance to chloride stress corrosion cracking compared to 300 series stainless steels
2. Better high-temperature strength than most austenitic stainless steels
3. Excellent resistance to oxidation and carburization
4. Good mechanical properties maintained over a wide temperature range</p
