
Alloy 800HT Pipe
1. Standard: ASTM B407, ASTM B514, ASTM B515, ASTM B829
2. Diameters: 4.0 - 1219.2 mm
3. Wall thickness: 0.3 to 50mm
4. Equivalent: UNS N08811, Din 1.4959, Incoloy 800HT
Alloy 800HT Pipe is a high temperature alloy that has improved creep and rupture properties at elevated temperatures above 1100°F (600°C). The chemical composition of Incoloy 800HT is roughly the same as Incoloy 800H/800, with slightly different carbon, aluminum, and titanium contents. ASME SB 407 UNS N08811 is known for its excellent resistance to high temperature oxidation, carburization, and corrosion.
Incoloy 800HT Pipe Material Standard:
- ASTM B407: Standard Specification for Nickel-Iron-Chromium Alloy Seamless Pipe and Tube
- ASTM B514: Standard Specification for Welded Nickel-Iron-Chromium Alloy Pipe
- ASTM B515 Standard Specification for Welded Nickel-Iron-Chromium Alloy Tubes
- ASTM B829: Standard Specification for General Requirements for Nickel and Nickel Alloys Seamless Pipe and Tube

Alloy 800/800H/800HT Chemical Composition
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr | Al | Ti |
| 800 | 0.10 max | 1.50 max | 1.00 max | 0.015 max | 0.75 max | 39.50 min | 30.00 – 35.00 | 19.00 – 23.00 | 0.15 – 0.60 | 0.15 – 0.60 |
| 800H | 0.05 – 0.10 | 1.50 max | 1.00 max | 0.015 max | 0.75 max | 39.50 min | 30.00 – 35.00 | 19.00 – 23.00 | 0.15 – 0.60 | 0.15 – 0.60 |
| 800HT | 0.06 – 0.10 | 1.50 max | 1.00 max | 0.015 max | 0.75 max | 39.50 min | 30.00 – 35.00 | 19.00 – 23.00 | 0.15 – 0.60 | 0.15 – 0.60 |
Alloy 800HT Pipe Sizes Dimensions
| Incoloy Pipe Types | Out diameter | Wall thickness | Length |
|---|---|---|---|
| Incoloy 800 Welded Pipe (in Stock + Custom Sizes) | 5.0mm ~ 1219.2mm | 1.0 ~ 15.0 mm | Upto 6 Meters |
| Incoloy 800 Seamless Pipe (Custom Sizes) | 5.0mm ~ 203.2mm | As per requirement | Upto 6 Meters |
| NB Sizes (in stock) | 1/8" ~ 8" | SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160 | Upto 6 Meters |
800 / 800H /800HT Material Equivalent
| Alloy | DIN Werkstoff nr. | UNS designation | JIS standard | BS standard | GOST standards | AFNOR UK | EN European standards |
| 800HT | 1.4859 / 1.4876 | N08811 | NCF 800HT | NA 15(HT) | ЭИ670 | – | X8NiCrAlTi32-21 |
ASTM B407 UNS N08811 Mechanical Properties
- Tensile Strength (MPa) min:Psi – 75,000 , MPa – 520
- Yield Strength 0.2% Proof (MPa) min: Psi – 30,000 , MPa –205
- Elongation (% in 50mm) min: 30
Incoloy 800ht Pipe Application Field
- 1. Petrochemical
- 2. Power Generation: Boiler and Steam Pipes
- 3. Chemical Processing
- 4. Heat Treatment
- 5. Aerospace
- 6. Heat Exchangers
Alloy 800HT Seamless Pipe Customized Service
Our HT PIPE manufacturer has several professional steel pipe production lines, capable of producing steel pipe products of different materials (such as stainless steel, nickel alloy) and specifications (from small diameter pipes to large diameter pipes). At the same time, we provide customized steel pipe solutions, including special processing, size, material, logo, surface treatment and packaging requirements. Contact us for more information and free quotes!
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