ASTM B514 N08800 Nickel-based nickel alloy natural gas processing pipe
ASTM B514 N08800 Nickel-based nickel alloy natural gas processing pipe
ASTM B514 N08800 is a standard for welded nickel-based alloy pipes. Due to their excellent high-temperature strength, corrosion resistance, oxidation resistance, and carburization resistance, they are ideal for natural gas processing. Their main characteristics include a nickel-chromium-iron composition, high strength, and good weldability, making them suitable for harsh environments.
What is the difference between Alloy 800 and Incoloy 800?
The fundamental difference between Incoloy 800 and Alloy 800 lies in their composition. Incoloy 800 is an austenitic nickel-iron-chromium alloy, with titanium and aluminum added to stabilize its structure. Its chromium content is typically higher than that of Alloy 800, ranging from 19.0% to 23.0% by weight.
ASTM B514 Inconel 800H N08800 Nickel-Based Alloy Welded Pipe (for Gas Treatment)
ASTM B514 is a standard developed by the American Society for Testing and Materials (ASTM) specifically for "welded nickel-iron-chromium alloy pipes," specifying the chemical composition, mechanical properties, dimensional tolerances, test methods, and technical requirements. UNS N08800 alloy steel is more commonly referred to commercially as Incoloy 800.
While strictly speaking, Incoloy 800 welded pipe is a nickel-iron-chromium alloy with a nickel content of approximately 30-35% and an iron content of approximately 39%, its properties are closer to those of nickel-based alloys, hence it is often referred to as a nickel-based alloy. Unlike seamless pipe, welded pipe is manufactured by cold-rolling flat sheets or coils and then welding the seams together. The commonly used welding method is inert gas shielded welding, such as argon arc welding (TIG).
ASTM B514 N08800 Welded Pipe Quality Control and Testing Requirements
Chemical Composition Analysis: Verify that the alloy composition meets the requirements of the N08800 welded pipe standard.
Mechanical Property Testing: For example, tensile testing to verify tensile strength, yield strength, etc.
Hydrostatic Testing or Non-Destructive Testing: Each pipe must undergo a hydrostatic test, or other non-destructive testing methods such as eddy current testing or radiographic testing, to verify its sealing and weld integrity.
Dimensional and Wall Thickness Inspection
Weld Macrostructure Inspection: Inspect the weld fusion and shape quality.
Intergranular Corrosion Testing (if applicable): Assess the material's resistance to intergranular corrosion.
ASTM B514 N08800 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 N08800 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 % |
Applications of ASTM B514 N08800 Nickel-Based Alloy Welded Pipes
Petrochemical and Refining Industries: Key equipment for hydrogen production, such as steam methane reformers, furnace tubes and gas headers, ethylene cracker tubes and pipelines, heat exchanger tubes and pipelines.
Process Chemical Industry: Phthalic anhydride and maleic anhydride production equipment, and heat exchangers in sulfuric acid recovery units.
Power Industry: Superheated steam piping and heat exchanger piping in nuclear power plants, and heat exchanger piping in supercritical boilers in high-efficiency thermal power plants.
Heat Treatment and Industrial Furnaces: Radiant tubes, muffle furnaces, and furnace rollers used in processes such as carburizing, annealing, and nitriding.
Waste Heat Recovery Systems: Boilers and heat exchangers that recover heat from high-temperature waste gases.
Why Choose Gnee Nickel Alloy (Supplier Example)?
✅ Large stock of Incoloy 800/800H/800HT alloy tubes/bars/plates/fittings, fast shipping.
✅ Factory direct sales, highly competitive prices, excellent value for money.
✅ Comprehensive quality assurance: Material Testing Certificate (MTC), chemical composition certificate, and mechanical properties certificate.
✅ Value-added services: slitting, cutting, polishing, surface treatment.
✅ Worldwide shipping, secure and reliable packaging, and provision of export-required documents.
Email: ss@gneesteel.com
Gnee Steel is a supplier of Incoloy 800/800H/800HT steel, offering a wide range of products including: seamless pipe (sizes: 4-219 mm; thickness: 0.5-20 mm); welded pipe (sizes: 5.0-1219.2 mm; thickness: 0.5-20 mm); plates (thickness 0.1 to 100 mm; width 10-2500 mm); strips; alloy round bars (diameter 3-800 mm); flat bars (thickness 2-100 mm; width 10-500 mm); hexagonal bars (size 2-100 mm); wire rods; and extruded profiles. We collaborate with steel mills to provide our customers with 800 series alloys, meeting or exceeding numerous leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN, and BS standards.
Gnee Steel stocks and sells Incoloy 800/800H/800HT steel, including pipes, plates, strips, round bars, flat bars, forged billets, hexagonal steel, wire rods, and extruded profiles. Please feel free to contact us at ss@gneesteel.com for a quote.
