Incoloy 800 / 800H / 800HT Square TubeASTM A554 · ASTM A554 / EN 10219 · Manufacturer, stockist & exporter, India
Alloy 800 · UNS N08800 / N08810 / N08811
An Incoloy 800 / 800H / 800HT square tube is square hollow section, made from Incoloy 800 / 800H / 800HT to ASTM A554 (ornamental) · A312 / A790 for pressure. Square tube is used for frames, handrails, architecture and structures.
- ASTM A554
- ASTM A554 / EN 10219
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an Incoloy 800 / 800H / 800HT Square Tube?
- What it is
- Square hollow section
- Material
- ASTM A554 (ornamental) · A312 / A790 for pressure
- Dimensions
- ASTM A554 / EN 10219
- Grade
- Incoloy 800 / 800H / 800HT · UNS N08800
- Best at
- Furnaces, petrochemical heaters and high-temperature piping
Incoloy 800 / 800H / 800HT Square Tube Specification
| Product | Incoloy 800 / 800H / 800HT Square Tube |
|---|---|
| Material standard | ASTM A554 (ornamental) · A312 / A790 for pressure |
| Dimensional standard | ASTM A554 / EN 10219 |
| Sizes | OD × wall to order |
| Length | Random, double random or cut lengths |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Square Tube
Square tube is used for frames, handrails, architecture and structures.
- Square hollow section
- Polished or mill finish
- Cut lengths
More on choosing: Square tube guide.
Incoloy 800 / 800H / 800HT Square Tube: Why 800 for square tubes
Square tube is used for frames, handrails, architecture and structures. In Incoloy 800 / 800H / 800HT, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Nickel-alloy tubulars handle acids, chlorides and heat. Incoloy 800 / 800H / 800HT is picked for furnaces, petrochemical heaters and high-temperature piping. |
|---|---|
| Typical service | Petrochemical — Steam-methane reformer and ethylene furnace piping. |
| Welding to carbon steel | A nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel |
| Matching filler | ERNiCr-3 (AWS A5.14) |
Incoloy 800 / 800H / 800HT Square 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 |
Incoloy 800 / 800H / 800HT Square 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% |
Full chemistry, properties and equivalents are on the Incoloy 800 / 800H / 800HT grade page.
Standards on this page
Incoloy 800 / 800H / 800HT Square Tubes for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiIncoloy 800 / 800H / 800HT Square Tube — questions buyers ask
What finishes are available on square tube?
Mill finish, 180–320 grit polish and hairline, depending on grade.
Can Incoloy 800 / 800H / 800HT square tubes be welded to carbon steel?
Yes — a nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel.
Which standard covers Incoloy 800 / 800H / 800HT square tubes?
The material is ASTM A554 (ornamental) · A312 / A790 for pressure; dimensions follow ASTM A554 / EN 10219. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Incoloy 800 / 800H / 800HT square tube?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026