Inconel 718 U-boltUNS N07718 · MSS SP-58 / manufacturer standard · Manufacturer, trader & exporter, India
Alloy 718 · UNS N07718
An Inconel 718 u-bolt is a U-shaped bolt for clamping pipes to supports. Finished fastener specification not asserted; material/feedstock may be supplied to ASTM B637 (UNS N07718), where applicable; manufacturing route and finished fastener requirements are to the purchase specification or project drawing. U-bolts hold pipes to supports and structures. Sized by pipe NPS with a threaded length on each leg.
- UNS N07718
- 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 Inconel 718 U-bolt?
- What it is
- A U-shaped bolt for clamping pipes to supports
- Finished spec
- Not asserted
- Material / feedstock
- ASTM B637 (UNS N07718), where applicable
- Dimensions
- MSS SP-58 / manufacturer standard
- Grade
- Inconel 718 · UNS N07718
- Best at
- Very high strength at temperatures up to about 650 °C
Inconel 718 U-bolt Specification
| Product | Inconel 718 U-bolt |
|---|---|
| Finished fastener specification | Not asserted |
| Material / feedstock specification | ASTM B637 (UNS N07718), where applicable |
| Dimensional standard | MSS SP-58 / manufacturer standard |
| Manufacturing route | Route dependent on product design and purchase specification |
| Project / purchase specification | Yes — finished fastener requirements are to the purchase specification or project drawing |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI (as specified in the PO) · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
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.
Inconel 718 U-bolt: Why 718 for u-bolts
U-bolts hold pipes to supports and structures. Sized by pipe NPS with a threaded length on each leg. In Inconel 718, 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. Inconel 718 is picked for very high strength at temperatures up to about 650 °C. |
|---|---|
| Typical service | Oil & gas — Wellhead parts, hangers and high-strength bolting. |
| Bolting | B7 (coated), B8M or nickel-alloy studs in Inconel 718 (bar to ASTM B637, where applicable), as the project specifies |
| Sour service | Listed in NACE MR0175 / ISO 15156-3 within its limits — state it on the order |
Inconel 718 U-bolt Chemical Composition
| Element | Weight % (producer reference) |
|---|---|
| Nickel (+Co) | 50.00 – 55.00 |
| Chromium | 17.00 – 21.00 |
| Iron | Balance |
| Niobium (+Ta) | 4.75 – 5.50 |
| Molybdenum | 2.80 – 3.30 |
| Titanium | 0.65 – 1.15 |
| Aluminium | 0.20 – 0.80 |
| Cobalt | 1.00 max |
Inconel 718 U-bolt Mechanical Properties
| Specification | Product form | Condition | Requirement values |
|---|---|---|---|
| ASTM A1014/A1014M (A1014/A1014M-26) | bolting (product types pending) | as specified | As specified |
Numerical requirements are not shown until the current edition of each standard has been verified. Mechanical properties depend on product form, size, condition and heat treatment — state them on the purchase order.
Full chemistry, properties and equivalents are on the Inconel 718 grade page.
Standards on this page
Other Inconel 718 fasteners
Inconel 718 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 Inconel 718 u-bolts?
Usually a nut in the same alloy — it may be machined from ASTM B637 bar, where applicable; finished requirements are to the purchase specification or project drawing.
Which standard covers Inconel 718 u-bolts?
Finished fastener specification: Not asserted. Material / feedstock: ASTM B637 (UNS N07718), where applicable. Dimensions: MSS SP-58 / manufacturer standard. State the finished specification, material and dimensions on your purchase order or project drawing.
What decides the price of a Inconel 718 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 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026