Incoloy 800 / 800H / 800HT Pipe & TubeASTM B407 UNS N08800 · Manufacturer, stockist & exporter, India
Also sold as Alloy 800 · UNS N08800 / N08810 / N08811 · W.Nr 1.4876 · Incoloy 800H
Incoloy 800 / 800H / 800HT pipe is supplied seamless to ASTM B407 and welded to ASTM B514, in ASME pipe sizes and schedules, with tube to ASTM B163 · B407. It is a nickel–iron–chromium alloy for high-temperature service, chosen for furnaces, petrochemical heaters and high-temperature piping. Kanak Steel & Engineering Co. supplies it with EN 10204 3.1 mill certificates from Mumbai to buyers across India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- Stock & mill supply
- EN 10204 3.1 / 3.2
- PMI on every heat
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is Incoloy 800 / 800H / 800HT Pipe & Tube?
Incoloy 800 / 800H / 800HT pipe & tube is a nickel–iron–chromium alloy for high-temperature service supplied as pipe & tube to ASTM B407 (UNS N08800). Buyers specify it for furnaces, petrochemical heaters and high-temperature piping. It is also sold as Alloy 800, UNS N08800 / N08810 / N08811, W.Nr 1.4876.
- What it is
- Nickel–iron–chromium alloy for high-temperature service
- Seamless
- ASTM B407
- Welded
- ASTM B514
- Sizes
- NPS ⅛" – 24" · OD tube to order
- Schedules
- 5S · 10S · 40S · 80S · 160 · XXS
- Best at
- Furnaces, petrochemical heaters and high-temperature piping
Incoloy 800 / 800H / 800HT Pipe & Tube Specification & Sizes
| Seamless pipe | ASTM B407 |
|---|---|
| Welded pipe | ASTM B514 |
| Tube | ASTM B163 · B407 |
| Grade | Incoloy 800 / 800H / 800HT · UNS N08800 · N08810 (800H) · N08811 (800HT) · W.Nr 1.4876 · 1.4958 · 1.4959 |
| Size & schedule | NPS ⅛" to 24" to ASME B36.19 / B36.10; OD × wall for tube |
| Length | Single random, double random, or cut lengths |
| Ends | Plain end · bevelled end (for welding) · threaded |
| Testing | Hydrostatic or eddy-current · PMI · flattening & flaring · IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
Incoloy 800 / 800H / 800HT Pipe: Seamless, Welded or Tube?
Three different specifications cover 800 tubular products. Pick the route first — it decides price, test requirements and lead time. General requirements (tolerances, hydrostatic or electric testing) come from ASTM B829 (seamless) and B775 (welded). Schedules, the −12.5% wall tolerance and the B31.3 wall formula are explained in the pipe guide.
| Route | Specification | Use it for |
|---|---|---|
| Seamless pipe | ASTM B407 | Pressure and critical service; no weld seam to inspect. |
| Welded pipe | ASTM B514 | Economical in larger diameters and thinner walls where the code allows it. |
| Tube | ASTM B163 · B407 | Heat exchangers and instruments; ordered by exact OD × wall. |
Incoloy 800 / 800H / 800HT Pipe Wall & Weight by Schedule
For the same size, the schedule sets the wall — and the weight you pay for. Cross-sections are drawn to scale for 2" NPS (OD 60.33 mm, ASME B36.19); weights use the density of Incoloy 800 / 800H / 800HT, 7.94 g/cm³.
Other sizes: pipe schedule chart and weight calculator.
Incoloy 800 / 800H / 800HT Pipe & Tube Chemical Composition
| Element | Weight % |
|---|---|
| Nickel | 30.0 – 35.0 |
| Chromium | 19.0 – 23.0 |
| Iron | 39.5 min |
| Carbon | 0.10 max (800) · 0.05 – 0.10 (800H) |
| Aluminium | 0.15 – 0.60 |
| Titanium | 0.15 – 0.60 |
| Copper | 0.75 max |
| Manganese | 1.5 max |
| Silicon | 1.0 max |
Incoloy 800 / 800H / 800HT Pipe & Tube Mechanical Properties
| Annealed plate | Value |
|---|---|
| Tensile strength | 520 MPa · 75 ksi (800) · 450 MPa · 65 ksi (800H) |
| Yield strength 0.2% | 205 MPa · 30 ksi (800) · 170 MPa · 25 ksi (800H) |
| Elongation | 30% |
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 7.94 g/cm³ |
| Melting range | 1357 – 1385 °C |
| Magnetic | Non-magnetic |
Incoloy 800 / 800H / 800HT Equivalent Grades
Values follow ASTM B409 for UNS N08800 / N08810. Always check against the edition named on your purchase order.
Incoloy 800 / 800H / 800HT Pipe Weight Chart (kg/m)
Weight per metre (kg/m) = (OD − WT) × WT × 0.02494, with OD and wall thickness in mm. The factor comes from Incoloy 800 / 800H / 800HT's density of 7.94 g/cm³.
Example: 4" Sch 40S (114.30 × 6.02 mm)
(114.30 − 6.02) × 6.02 × 0.02494 = 16.26 kg/m
| NPS | OD mm | Sch 10S kg/m | Sch 40S kg/m |
|---|---|---|---|
| ½" | 21.34 | 1.01 | 1.28 |
| 1" | 33.40 | 2.12 | 2.53 |
| 2" | 60.33 | 3.98 | 5.50 |
| 3" | 88.90 | 6.53 | 11.42 |
| 4" | 114.30 | 8.46 | 16.26 |
| 6" | 168.28 | 13.98 | 28.58 |
| 8" | 219.08 | 20.19 | 43.03 |
Six-digit Harmonized System heading (iron and steel, chapter 72–73). Your country adds its own digits — confirm with your customs broker. All HS codes.
How to Verify Incoloy 800 / 800H / 800HT Pipe & Tube with PMI
Positive material identification with a handheld XRF gun confirms the alloy on the piece itself, in seconds, before it is cut or welded. Incoloy 800 / 800H / 800HT is most often mixed up with Inconel 825 — the table shows which elements tell them apart.
Handheld XRF does not measure carbon or nitrogen; those come from the mill certificate or optical emission (OES) testing. We PMI-test nickel alloys as standard and any grade on request.
| Element | Incoloy 800 / 800H / 800HT | Inconel 825 |
|---|---|---|
| Nickel | 30.0 – 35.0 | 38.0 – 46.0 |
| Chromium | 19.0 – 23.0 | 19.5 – 23.5 |
| Molybdenum | residual | 2.5 – 3.5 |
| Copper | 0.75 max | 1.5 – 3.0 |
| Titanium | 0.15 – 0.60 | 0.6 – 1.2 |
| Iron | 39.5 min | 22.0 min |
| Manganese | 1.5 max | 1.0 max |
Incoloy 800 / 800H / 800HT Pipe & Tube Price — What Decides It
Two quotes for "800 pipe & tube" can differ by 20% and both be fair. We quote 800 pipe & tube per kg for full sizes and per piece for cut sizes. These six things move the price per kg, so you can compare offers like for like.
Incoloy 800 / 800H / 800HT Pipe & Tube Applications
Incoloy 800 / 800H / 800HT is specified when the cheaper grade will not survive the service but a higher alloy would be more than the job needs. These are the jobs our buyers use it for.
Incoloy 800 / 800H / 800HT Pipe & Tube vs 310S, 600 and 825
| Grade | Pipe & Tube standard | PREN (approx.) | Pick it when |
|---|---|---|---|
| Inconel 600 | ASTM B167 | — | High-temperature oxidation, caustic and nuclear service |
| Incoloy 800 / 800H / 800HT | ASTM B407 | — | Furnaces, petrochemical heaters and high-temperature piping |
| SS 310 / 310S | ASTM A312 TP310S | ≈ 25 | Furnaces, burners and heat treatment at high temperature |
| Inconel 825 | ASTM B423 | ≈ 31 | Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas |
PREN = Cr + 3.3 Mo + 16 N, from mid-range chemistry. A screening guide, not a substitute for corrosion data on your medium.
Incoloy 800 / 800H / 800HT Corrosion Resistance — Element by Element
Each alloying addition has a job. Knowing which one protects against your medium is the quickest way to judge whether 800 fits.
Balanced nickel and chromium resist oxidation and carburisation in furnace atmospheres.
Controlled carbon and coarse grain give 800H/HT their creep-rupture strength above 600 °C.
Aluminium and titanium improve high-temperature strength.
For aqueous acid service choose 825 instead.
How your 800 pipe & tube order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked and material is PMI-tested before processing.
- 03Processing — cutting, machining or bevelling to your specification, with heat numbers marked.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Welding & Fabricating Incoloy 800 / 800H / 800HT Pipe & Tube
Incoloy 800 / 800H / 800HT welds by all common arc processes. A few points our buyers ask about:
| Matching filler | ERNiCr-3 (AWS A5.14) |
|---|---|
| Over-alloyed filler | ERNiCrCoMo-1 for creep-critical joints |
| Preheat | Not required; keep interpass temperature low |
| Cutting | Thermal or abrasive cutting; grind off heat-tinted edges before welding |
Follow your approved WPS; this is general guidance. See also 800 fittings and 800 flanges for the matching pipe-system parts.
How to Order Incoloy 800 / 800H / 800HT Pipe & Tube: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Seamless or welded, and the standard
- NPS and schedule (or OD × wall for tube)
- Length — random or cut, and number of lengths
- End finish — plain, bevelled or threaded
- Certificate type and extra tests
- Delivery port, Incoterm and required date
Incoloy 800 / 800H / 800HT pipe & tube for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiIncoloy 800 / 800H / 800HT pipe & tube — questions buyers ask
Is Incoloy 800 / 800H / 800HT the same as Alloy 800?
Yes. Alloy 800, UNS N08800 / N08810 / N08811, W.Nr 1.4876 all refer to the same material, and pipe & tube is ordered to ASTM B407 whichever name is on the enquiry.
What is the difference between Incoloy 800 / 800H / 800HT pipe and tube?
Pipe is ordered by nominal pipe size and schedule, for carrying fluids. Tube is ordered by exact outside diameter and wall, for heat exchangers and instruments, and is held to tighter tolerances.
Seamless or welded Incoloy 800 / 800H / 800HT pipe — which should I buy?
Seamless (ASTM B407) is the default for pressure and critical service. Welded (ASTM B514) is cheaper in larger diameters and thinner walls and is accepted where the design code allows it.
What is the wall-thickness tolerance on Incoloy 800 / 800H / 800HT pipe?
Seamless pipe is normally allowed −12.5% on nominal wall under its general-requirements standard (ASTM B829 (seamless) and B775 (welded)). Allow for it in the pressure calculation or order on minimum wall.
Can Incoloy 800 / 800H / 800HT pipe be welded to carbon-steel pipe?
Yes, with the right filler: a nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel. Follow a qualified WPS.
Incoloy 800 / 800H / 800HT or Inconel 825 — which should I choose?
Incoloy 800 / 800H / 800HT is chosen for furnaces, petrochemical heaters and high-temperature piping. Inconel 825 is the step up when you need more pitting resistance or strength. See the comparison table on this page, or ask us with your process conditions.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026