Alloy 600 Steel Tube & Pipe • UNS N06600 • WNR 2.4816
Alloy 600 Steel Tube & Pipe • UNS N06600 • WNR 2.4816
Chemical Composition
The typical chemical composition of Alloy 600 includes:
- Nickel (Ni): 72.0 min
- Chromium (Cr): 14.0 – 17.0
- Iron (Fe): 6.0 – 10.0
- Manganese (Mn): 1.0 max
- Silicon (Si): 0.5 max
- Copper (Cu): 0.5 max
- Carbon (C): 0.15 max
- Sulfur (S): 0.015 max
Mechanical Properties
- Tensile Strength: 655 MPa (95 ksi) min
- Yield Strength (0.2% Offset): 240 MPa (35 ksi) min
- Elongation: 30% min
- Hardness: 85 HRB max
Physical Properties
- Density: 8.47 g/cm³
- Melting Point: 1354 – 1413 °C (2470 – 2575 °F)
- Specific Heat: 444 J/kg-°C (0.106 Btu/lb-°F)
- Thermal Conductivity: 14.8 W/m-°C (102 Btu-in/ft²-h-°F)
Applications
Alloy 600 is employed in various industries due to its excellent performance in high-temperature and corrosive environments. Common applications include:
- Aerospace: Engine and airframe components exposed to high temperatures.
- Chemical Processing: Heat exchangers, evaporators, and flaking trays.
- Nuclear Engineering: Reactor components and heat exchangers.
- Heat Treating: Furnace components, such as muffles, retorts, and radiant tubes.
- Power Generation: Steam generators and other high-temperature components.
Corrosion Resistance
Alloy 600 is highly resistant to a variety of corrosive environments, including:
- Oxidation and Carburization: Excellent resistance to oxidation and carburization at elevated temperatures.
- Acids and Alkalis: Good resistance to a wide range of acids and alkalis, particularly in oxidizing and reducing environments.
- Chlorides: Resistant to chloride-ion stress-corrosion cracking.
Fabrication and Welding
Alloy 600 is relatively easy to fabricate using standard techniques:
- Forming: Can be hot or cold formed using conventional methods.
- Machining: Machining should be performed with appropriate tooling and cutting fluids to manage work hardening.
- Welding: Can be welded using standard welding techniques such as TIG, MIG, and resistance welding. Filler metals of matching composition are recommended.
Standards and Specifications
- ASTM: B163, B167 (tubes); B168 (plates, sheets, and strips); B166 (bars and rods)
- ASME: SB163, SB167 (tubes); SB168 (plates, sheets, and strips); SB166 (bars and rods)
- DIN: 17742 (plates, sheets, and strips), 17750 (tubes), 17752 (bars and rods)
- ISO: 6208
Summary
Alloy 600, with its superior resistance to oxidation, corrosion, and high temperatures, is a versatile material ideal for demanding applications in aerospace, chemical processing, nuclear engineering, heat treating, and power generation industries. Its excellent mechanical properties and ease of fabrication further enhance its suitability for critical high-temperature and corrosive environments.
Alloy C276 is a highly versatile nickel-molybdenum-chromium alloy with excellent corrosion resistance in a wide range of severe environments. It is particularly known for its resistance to pitting, stress-corrosion cracking, and oxidizing atmospheres.
Alloy 400 is a nickel-copper alloy known for its excellent corrosion resistance and high strength across a wide temperature range. It is particularly effective in reducing and oxidizing environments and offers good mechanical properties at sub-zero temperatures.
INCONEL Alloy 625 (UNS N06625 / WNR 2.4856) is a highly versatile alloy widely used across various industries due to its exceptional mechanical properties, outstanding corrosion resistance, and excellent fabricability. It is particularly well-suited for high-stress and high-temperature applications in aerospace, marine, chemical processing, oil and gas, and power generation sectors.
Nickel 690 (UNS N06690 / WNR 2.4642) is a versatile alloy with excellent welding and fabrication characteristics. By adhering to best practices and understanding the specific requirements of this alloy, engineers and fabricators can ensure high-quality results in various industrial applications. Its robustness in resisting corrosion and maintaining mechanical integrity at high temperatures makes it a preferred choice for demanding environments.
Nickel Alloy 825 (UNS N08825 / WNR 2.4858) is a versatile alloy with excellent resistance to corrosion and high-temperature stability. Its favorable welding and fabrication characteristics make it a preferred choice for demanding industrial applications. By adhering to best practices and understanding the specific requirements of this alloy, engineers and fabricators can ensure high-quality results and reliable performance in various environments such as chemical processing, oil and gas, pollution control, and nuclear power.
Nickel Alloy 800, 800H, and 800HT (UNS N08800/N08810/N08811) offer excellent strength and resistance to oxidation and carburization at high temperatures, making them suitable for demanding industrial applications. By adhering to best practices and understanding the specific requirements of these alloys, engineers and fabricators can ensure high-quality results and reliable performance in various environments, including chemical processing, petrochemical and refining, power generation, and nuclear power industries.
