As a reliable Incoloy 800HT tube supplier, we at XTD provide certified tubes that follow all international standards. You can buy certified high-quality Incoloy 800HT seamless tubes from us at XTD. We are a company with multiple international certifications and four decades of experience.
ASTM B407 Incoloy 800HT Seamless Tube Manufacturer
We, Xintongda Special Steel (XTD), are a leading Incoloy 800HT seamless tube manufacturer in China. Incoloy 800HT is a high-performance nickel-iron-chromium alloy tube that is constructed without a welded seam. We provide this tube in adherence to the ASTM B407 standard. The ‘HT’ designation refers to High Temperature. This means that this Alloy 800HT tube has enhanced properties over the standard 800/800H grades due to the aluminium (0.25-0.60%) and titanium (0.25-0.60%) addition. The controlled presence of Nickel (30-35%), Chromium (19-23%), and Iron (~39.5% min) along with controlled amounts of Carbon (0.06-0.10%), Aluminum (0.25-0.60%), and Titanium (0.25-0.60%) provide the tube a stable austenitic microstructure, exceptional high-temperature strength and resistance to various forms of high-temperature corrosion. This tube is suitable for high-temperature structural applications (1100°F up to 1800°F (593°C - 982°C) like furnace components and heat exchangers. We have ISO-certified quality systems and supply DIN 1.4959 tubes within a week for stock orders.
As a reliable Incoloy 800HT seamless tube supplier, we provide tubes that meet the following specifications:
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Standard
ASTM B407
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OD Range
6-457 mm
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Thickness
1-65 mm
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Length
≤ 22 m
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Technical Data
Technical Data
Incoloy 800HT Seamless Tube Manufacturing Process
The manufacturing process of Incoloy 800HT seamless tube begins with a solid billet. This billet is pierced to create a hollow tube shell. The tube then undergoes several drawing and annealing steps. Drawing reduces the diameter and wall thickness. Annealing restores the material's desired properties. Finally, the tube is straightened, cut to length, and subjected to strict testing for quality assurance. Visit this page to learn more about the detailed manufacturing process of our seamless tubes.
Features of Alloy 800HT Tube
Alloy 800HT tube has five key features that make it a preferred choice over standard 800/800H grades: high-temperature performance, creep and rupture strength, optimized chemical composition, excellent mechanical properties, and good corrosion resistance.
- High-Temperature Performance: Alloy 800HT tube provides superior stability and strength at elevated temperatures (1100°F up to 1800°F (593°C to 982°C). This is because of its controlled carbon content (0.06-0.10%) combined with its high nickel (30-35%) and chromium (19-23%) composition. This provides the tube with the ability to operate in prolonged heat exposure.
- Creep & Rupture Strength: The tube exhibits exceptional resistance to creep and rupture, especially under stress at high heat. This key feature is a result of the careful control of carbon, aluminium (0.25-0.60%), and titanium (0.25-0.60%) content. This ensures the tube does not deform or fail over time.
- Chemical Composition: The chemical composition of Alloy 800HT is carefully controlled to give it enhanced properties. It has higher carbon content and stricter limits on aluminum and titanium, which distinguishes it from the standard 800 and 800H grades.
- Mechanical Properties: The tube delivers excellent tensile and yield strength, especially after high-temperature exposure. The Incoloy 800H seamless tube shares similar desirable mechanical properties as both grades undergo solution annealing at high temperatures.
- Good Corrosion Resistance: Alloy 800HT tube offers strong resistance to various corrosive media, including oxidation and carburisation. This is mainly due to its high chromium content, which forms a stable, protective oxide layer on the metal's surface.
Seamless Incoloy 800HT Nickel Alloy Equivalent Material
Seamless Incoloy 800HT nickel alloy is commonly known by the UNS designation, UNS N08811. Some other global equivalents include German Werkstoff Nr. 1.4959, French X8NiCrAlTi32-21, and JIS NCF 800HT.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| Incoloy 800HT | N08811 | - | NS112 | NCF800HT | - | 1.4959 | - |
100% Certified Testing & Documentation
We provide the following certifications to ensure our tubes comply with ASTM B407 standards.
- 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 800HT Tube
Incoloy 800HT tubing finds applications in these 5 high-temperature industries:
Acid Production and Pickling Operations
The tubing is used for heaters, containers, and piping in sulfuric acid and nitric acid processes. Its corrosion resistance is vital for preventing degradation from these strong, hot, acidic chemicals.
Paper Mills
Incoloy 800HT tube is used in digesters and heat exchangers in the pulp and paper industry. The tube resists corrosion even when exposed to the aggressive chemicals and elevated temperatures used in the wood pulping process.
Pollution Control
In pollution control equipment, the tube is used in scrubbers and stacks handling corrosive flue gases. Its resistance to sulfur-containing atmospheres and high-temperature oxidation is critical here.
Oil and Gas Recovery
The tubing is used in downhole applications and in processing equipment like heat exchangers. It performs reliably due to its strength and resistance to hot, sour (H₂S-containing) gas environments.
Aerospace
The tube is applied in jet engine components and high-temperature aircraft systems. Its thermal stability and creep resistance ensure reliable performance under extreme operating conditions.
Frequently Asked Questions
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Where can I buy certified Incoloy 800HT seamless tubes?
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What is the maximum operating temperature of Incoloy 800HT tubes?The maximum operating temperature for Incoloy 800HT tubes reaches up to 1800°F (982°C).
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What testing is required for 800HT seamless tubes?Testing for Incoloy 800HT seamless tubes includes hydrostatic, eddy current, hardness, and NACE MR0175. Grain size and flare tests are also standard.