Incoloy 800HT |UNS N08811|1.4959 Seamless Tube
Our Incoloy 800HT seamless pipes feature a controlled combined content of Aluminum and Titanium (0.85-1.20%) and undergo specialized high-temperature annealing to ensure optimum creep and rupture strength. Ideal for petrochemical processing, industrial furnace components, and power generation heat exchangers, these tubes offer superior resistance to oxidation, carburization, and nitriding. Through advanced cold-drawing and rigorous quality testing, Tengqi delivers certified, high-durability solutions for the world’s most demanding thermal environments.
SeamlessIncoloy 800HT Tube (Incoloy800HT / UNS N08811 / W.Nr. 1.4959) is the Incoloy 800H variant with enhanced creep and stress-rupture properties above 1000 °C. Manufactured by Tengqi in Fujian, China, every heat is fully traceable, hydro-tested and available with third-party inspection (SGS / BV / TUV) on request.
Product Specifications
- ASTM B163 — Seamless Condenser & Heat Exchanger Tubes
- ASTM B167 / B407 / B423 — Seamless Tube
- ASTM B444 — Seamless Pipe & Tube
- ASTM B704 — Welded Tube
- ASTM B829 — General Requirements
- Finishing: solution annealed, pickled & polished; bright annealed available on request
Size Range
| Outside Diameter (OD) | Wall Thickness | Length |
|---|---|---|
| 6.35 mm – 257 mm (1/4"– 10.1") | 0.5 mm – 12.7 mm | ≤ 22 m |
Chemical Composition
Incoloy800HT (UNS N08811) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni | Cu | Ti | Al | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| N08811 | 0.06 – 0.10 | ≤ 1.5 | ≤ 0.045 | ≤ 0.015 | ≤ 1.0 | 19.0 – 23.0 | 30.0 – 35.0 | ≤ 0.75 | 0.25 – 0.60 | 0.25 – 0.60 | ≥ 39.5 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed, pickled & polished |
| Tensile Strength | ≥ 448 MPa |
| Yield Strength (0.2% offset) | ≥ 172 MPa |
| Elongation in 2 in. / 50 mm | ≥ 30% |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.94 g/cm3 |
| Thermal Conductivity | 11.5 W/m·K |
| Specific Heat Capacity | 460 J/kg·K |
| Elastic Modulus | 196 GPa |
| Magnetic Properties | Practically non-magnetic |
Industry Applications
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Browse the complete ranges: All Incoloy Alloy Tubes | Explore Incoloy Alloy Pipes | Seamless Stainless Steel Tubes Catalog
CONTACT US
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