Incoloy 800 / 800H / 800HT U-boltASTM B408 · MSS SP-58 / manufacturer standard · Manufacturer, stockist & exporter, India
Alloy 800 · UNS N08800 / N08810 / N08811
An Incoloy 800 / 800H / 800HT u-bolt is a U-shaped bolt for clamping pipes to supports, made from Incoloy 800 / 800H / 800HT to ASTM B408. U-bolts hold pipes to supports and structures. Sized by pipe NPS with a threaded length on each leg.
- ASTM B408
- MSS SP-58 / manufacturer standard
- 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 U-bolt?
- What it is
- A U-shaped bolt for clamping pipes to supports
- Material
- ASTM B408
- Dimensions
- MSS SP-58 / manufacturer standard
- Grade
- Incoloy 800 / 800H / 800HT · UNS N08800
- Best at
- Furnaces, petrochemical heaters and high-temperature piping
Incoloy 800 / 800H / 800HT U-bolt Specification
| Product | Incoloy 800 / 800H / 800HT U-bolt |
|---|---|
| Material standard | ASTM B408 |
| Dimensional standard | MSS SP-58 / manufacturer standard |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose an U-bolt
U-bolts hold pipes to supports and structures. Sized by pipe NPS with a threaded length on each leg.
- Sized to pipe NPS
- With nuts and plates
- Matching or isolated material
More on choosing: U-bolt guide.
Incoloy 800 / 800H / 800HT U-bolt: Why 800 for u-bolts
U-bolts hold pipes to supports and structures. Sized by pipe NPS with a threaded length on each leg. 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 fasteners match nickel-alloy flanges in corrosive or hot service. Incoloy 800 / 800H / 800HT is picked for furnaces, petrochemical heaters and high-temperature piping. |
|---|---|
| Typical service | Petrochemical — Steam-methane reformer and ethylene furnace piping. |
| Bolting | B7 (coated), B8M or nickel-alloy studs such as Incoloy 800 / 800H / 800HT from ASTM B408, as the project specifies |
Incoloy 800 / 800H / 800HT U-bolt 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 U-bolt 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
Other Incoloy 800 / 800H / 800HT fasteners
Incoloy 800 / 800H / 800HT U-bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiIncoloy 800 / 800H / 800HT U-bolt — questions buyers ask
Should U-bolts match the pipe material?
Use the same alloy, or an isolating sleeve, to avoid galvanic corrosion between pipe and bolt.
What nut is used with Incoloy 800 / 800H / 800HT u-bolts?
A nut in the same alloy, machined from ASTM B408 bar, unless the project specifies otherwise.
Which standard covers Incoloy 800 / 800H / 800HT u-bolts?
The material is ASTM B408; dimensions follow MSS SP-58 / manufacturer standard. 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 u-bolt?
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