The difference between Incoloy 800 and 800H tubes is that Incoloy 800H has a higher carbon content (0.05-0.10%) than Incoloy 800. This boosts creep and rupture strength at high temperatures.
ASTM B407 Incoloy 800H Seamless Tube Manufacturer
As a reliable Incoloy 800H seamless tube manufacturer in China, at Zhejiang Xintongda Special Steel (XTD), we make tubes that meet ASTM B407 standard. Incoloy 800H seamless (SMLS) tube, also known by the designation DIN 1.4958 tube, is a high-strength nickel-iron-chromium alloy tube. As compared to the standard Alloy 800, this tube has better performance and creep-rupture strength because of the controlled levels of carbon, aluminium, and titanium. It maintains integrity within a temperature range up to 1100°F (593°C). The SMLS 800H tube is resistant to oxidation, carburisation, nitridation and thermal fatigue. This makes it ideal for applications requiring continuous exposure to elevated temperatures. It also exhibits excellent resistance to aqueous corrosion.. Its properties make it a primary choice for superheater and reheater tubes in power plants. We are ISO-certified and supply global industrial clients. We also provide custom Incoloy 800H tubes that meet customer requirements.
Our ASME SB407 Incoloy 800H tube meets the following specifications:
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Standard ASTM B407
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OD Range 6-457 mm -
Thickness 1-65 mm -
Length ≤ 22 m
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Technical Data
Technical Data
Manufacturing Process Alloy 800H Seamless Tube
The manufacturing process of Alloy 800H seamless tubes starts with a solid billet of the nickel-iron-chromium alloy. A rotary piercing mill is often used to make a hollow shell out of this billet. After that, the shell is cold-worked by drawing or rolling it to get the right diameter, wall thickness and surface finish. To optimise the material’s properties, a final annealing heat treatment is performed on the tube. Refer to this page to learn about the detailed production of seamless tubes.
Features of Incoloy 800H Tube
ASME SB407 Incoloy 800H tube has 5 key characteristics: good corrosion resistance, optimized chemical composition, excellent mechanical properties, good workability, and elevated temperature resistance.
- Good Corrosion Resistance: Incoloy 800H tube resists oxidation, carburisation and nitridation in high-temperature environments, mainly due to the nickel and chromium content. This increases the service life of heat exchangers, furnace components, and chemical processing equipment by reducing material degradation.
- Chemical Composition: This tube contains controlled levels of carbon (0.05-0.10%), aluminium, and titanium to maintain stability and strength. This specific composition ensures the tube meets the ASME SB407 standard and maintains its strength under high heat and pressure.
- Mechanical Properties: The tube has high tensile strength and creep-rupture strength even at high temperatures. These properties allow the tube to endure significant stress and maintain structural integrity in demanding pressure applications like steam generation.
- Good Workability: DIN 1.4958 tube can be readily formed, welded, and machined using standard industrial processes due to its austenitic crystal structure. This ease of fabrication reduces manufacturing complexity and cost. It also allows for efficient creation of intricate tube shapes and assemblies.
- Elevated Temperature Resistance: As the tube undergoes a solution-annealed treatment, it remains stable at temperatures up to 1100°F (593°C). This resistance ensures that the tube can be used safely in extremely hot environments, like petrochemical heaters and parts of nuclear reactors, without losing strength.
UNS N08810 Seamless Tubes Equivalent Material
Incoloy 800H tube is popularly known as UNS N08810. It is also known as German Werkstoff No. 1.4958 and Japanese NCF 800H.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| Incoloy 800H | N08810 | - | NS112 | NCF800H | X10NiCrAlTi32-20 | 1.4876 | 08ХН32Т |
100% Certified Testing & Documentation
We provide the following certifications to ensure our Incoloy 800H seamless tube complies with ASTM B407 standard:
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
Application of Incoloy 800H Seamless Tube
Incoloy 800H seamless tube is used in high-temperature and corrosive environments across multiple industries due to its excellent creep-rupture strength and oxidation resistance. 5 key applications include:
Furnace Components
Incoloy 800H tube is used for making radiant tubes and muffles inside high-temperature industrial furnaces. Its strength and resistance to carburisation at extreme temperatures ensure long life and operational reliability in the heating zones.
High-Temperature Industrial Equipment
The tubing is used in making superheater and reheater pipes in power generation boilers. It maintains mechanical integrity and resists creep-rupture stress when exposed to high-pressure steam at elevated temperatures.
Heat Exchangers
The seamless tube makes the tube bundles transfer heat between different materials without mixing. It resists degradation from thermal stress and corrosion caused by hot gases or fluids. This ensures safe and efficient heat transfer.
Petrochemical & Chemical Processing Units
This tube is used in creating equipment like pyrolysis tubing and cracking furnaces for hydrocarbon processing. The tube handles high pressures and resists attack from oxidising and reducing chemical environments in critical industrial reactions.
Pulp and Paper Industry
Incoloy 800H seamless tube is used in digester liquid heaters in the pulping process due to its excellent corrosion and high-temperature resistance. This tube is also used in piping systems that transport hot and corrosive fluids within the pulp and paper mills.
Frequently Asked Questions
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What is the difference between Incoloy 800 and 800H Tubes?
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Are custom sizes available for Incoloy 800H seamless tubes?Yes, at XTD, we provide custom sizes for Incoloy 800H seamless tubes. The Outside Diameter ranges from 6 mm to 457 mm, Thickness Range can be customised from 1 mm to 65 mm and maximum lengths up to 18 m are available.
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What testing and inspection are done on Incoloy 800H seamless tubes?Incoloy 800H seamless tube undergoes hydrostatic, non-destructive, electric, flattening, and hardness tests. It also receives visual checks, intergranular corrosion tests, and certification to meet ASTM B407 standards.