Product: ASTM B407 Incoloy 800 / UNS N08800, N08811, N08825 / DIN 1.4876 / ASME SB407 Alloy 825 Seamless Pipes
1. What are the typical applications of these Incoloy 800/825 seamless pipes?
Answer: These alloys are widely used in high-temperature and corrosive environments, including chemical processing, petrochemical plants, power generation, marine equipment, and heat exchangers. Alloy 825 is particularly resistant to reducing and oxidizing agents, while Incoloy 800 is ideal for high-temperature structural applications.
2. What are the main differences between Incoloy 800, 800H, 800HT, and Alloy 825?
Answer:
Incoloy 800: Excellent resistance to oxidation and carburization at high temperatures.
Incoloy 800H/HT: Higher carbon content for improved strength at elevated temperatures.
Alloy 825: Contains molybdenum and copper, offering superior resistance to strong acids and chloride-induced corrosion.
3. What are the standard specifications and dimensions available for these seamless pipes?
Answer:
ASTM B407 / ASME SB407: Covers seamless pipes in various diameters and wall thicknesses.
DIN 1.4876: European standard for heat-resistant and corrosion-resistant steel.
Pipes are typically available in OD ranging from 1/2" to 12" and wall thicknesses per ASTM/ASME/DIN schedules. Custom sizes can be manufactured upon request.
4. How should these pipes be tested to ensure quality?
Answer: Standard testing includes:
Mechanical tests: Tensile, hardness, and elongation tests.
Non-destructive tests (NDT): Ultrasonic testing, eddy current, and radiography to detect internal defects.
Chemical analysis: Verification of alloy composition against UNS or ASTM specifications.
Corrosion tests: Especially for Alloy 825 in acidic or chloride environments.
5. What are the recommended operating temperature and pressure ranges?
Answer:
Incoloy 800: Can be used up to 1100°F (593°C) for structural applications.
Alloy 825: Suitable for temperatures up to 1500°F (815°C) in high-corrosion environments.
Maximum operating pressure depends on wall thickness, pipe diameter, and applicable ASME or DIN standards. A detailed engineering calculation is recommended for critical applications.
