ASTM B514 incoloy 800H Gas Processing Welded Pipe
ASTM B514 Incoloy 800H welded pipe is made from a high-nickel alloy suitable for high-temperature and corrosive gas handling applications. Key properties include excellent resistance to oxidation, carburization, and sulfidation, as well as outstanding mechanical properties against creep and rupture at temperatures up to 1100°F (593°C) and above. These pipes, conforming to ASTM B514, are suitable for use in the petrochemical, power generation, and chemical processing industries.
What are the ASTM specifications for Incoloy 800?
The primary ASTM specifications for Incoloy 800 include ASTM B409 for plate and sheet, ASTM B407 for seamless pipe, and ASTM B366 for welded fittings. These specifications cover the alloy's chemical composition, mechanical properties, and heat treatment requirements. Incoloy 800 is an iron-nickel-chromium alloy known for its high strength, heat resistance, and corrosion resistance.
ASTM B514, a standard developed by the American Society for Testing and Materials (ASTM), specifically specifies the chemical composition, mechanical properties, dimensional tolerances, test methods, and technical requirements for welded nickel-iron-chromium alloy pipe. UNS N08800 alloy steel is commonly referred to commercially as Incoloy 800.
While strictly speaking, Incoloy 800 is a nickel-iron-chromium alloy with approximately 30-35% nickel and 39% iron, its properties are closer to those of nickel-base alloys, and therefore it is often referred to as such. Unlike seamless pipe, welded pipe is produced by cold-rolling flat sheets or coils and then welding the seams together. The welding method typically used is inert gas welding, such as TIG welding.
ASTM B514 N08800 Quality Control and Testing Requirements
Chemical composition analysis verifies that the alloy composition meets the requirements of N08800.
Mechanical property testing, such as tensile testing, verifies tensile strength and yield strength. Hydrostatic testing or nondestructive testing: Each pipe must undergo hydrostatic testing or other nondestructive testing methods, such as eddy current testing or radiographic testing, to verify leak tightness and weld integrity.
Dimensional and wall thickness testing.
Weld macrostructure testing: Checks weld fusion and form quality.
Intergranular corrosion testing (if required): Evaluates the material's resistance to intergranular corrosion.
ASTM B514 800H Chemical Composition
| UNS. | Ni | C | Fe | Si | Mn | S | AI | Ti | Cu | Cr |
| N08800 | 30-35 | 0.1 max | 39.5 min | 1.0 max | 1.5 max | 0.015 max | 0.15-0.60 | 0.15-0.60 | 0.75 max | 19-23 |
ASTM B514 incoloy 800H Mechanical Properties
| UNS. | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| N08800 | 7.94 g/cm3 | 1385 °C (2525 °F) |
Psi – 75,000 , |
Psi – 30,000 , MPa – 205 |
30 % |
ASTM B514 Standard
Welded Pipe Specification: ASTM B514 is the standard specification for welded, cold-worked, and annealed nickel-iron-chromium alloy pipe.
Manufacturing Process: This pipe is made from flat-rolled Incoloy sheet and welded automatically without the addition of filler metal.
Cold Working and Annealing: After welding, the material is cold worked on the weld and/or the parent material, then annealed to relieve stress and produce a controlled grain size.
Quality Control: This standard specifies requirements for chemical composition, mechanical properties, and nondestructive testing (such as hydrostatic testing).
Related Standards: For applications requiring higher strength above 1290°F (700°C), Alloy 800HT (UNS N08811) follows the same standard, but with more stringent chemical composition controls.
Materials and Composition
Alloy: Incoloy 800H is a nickel, chromium, and iron alloy.
Composition: The high nickel and chromium content provides high strength and corrosion resistance. The "H" in 800H indicates a high-carbon version of alloy 800, which improves creep and stress-rupture strength.
UNS Designation: Incoloy 800H is designated UNS number N08810.
Key Properties
High-Temperature Strength: Incoloy 800H maintains excellent mechanical properties and stability at elevated temperatures. It is particularly well-suited for applications requiring high creep and rupture strength above 1100°F (593°C).
Corrosion Resistance: It resists oxidation, sulfidation, and carburization, and is resistant to chloride-induced stress corrosion cracking.
Durability: The alloy resists embrittlement caused by prolonged exposure to elevated temperatures.
Applications
Gas Processing: Suitable for use in petrochemical and natural gas processing plants. Power Generation: Used in power plants, including as reheater and superheater tubes.
Chemical Processing: Suitable for use in a variety of chemical processing environments.
Other Industries: Also used in heat exchangers, nuclear power applications, and the pulp and paper industry.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
