Inconel 718 Stud BoltUNS N07718 · ASME B18.31.2 · Manufacturer, trader & exporter, India
Alloy 718 · UNS N07718
An Inconel 718 stud bolt is a fully threaded rod supplied with two heavy hex nuts. ASTM A1014 (UNS N07718) where specified — product-type scope pending current standard text; otherwise may be machined from ASTM B637 bar (UNS N07718), where applicable — finished requirements to the purchase specification or project drawing. Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables.
- UNS N07718
- ASME B18.31.2
- 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 Stud Bolt?
- What it is
- A fully threaded rod supplied with two heavy hex nuts
- Finished spec
- ASTM A1014 (UNS N07718) where specified — product-type scope pending current standard text
- Material / feedstock
- ASTM B637 bar (UNS N07718), where applicable
- Dimensions
- ASME B18.31.2 · B16.5 bolting tables
- Grade
- Inconel 718 · UNS N07718
- Best at
- Very high strength at temperatures up to about 650 °C
Inconel 718 Stud Bolt Specification
| Product | Inconel 718 Stud Bolt |
|---|---|
| Finished fastener specification | ASTM A1014 (UNS N07718) where specified — product-type scope pending current standard text |
| Material / feedstock specification | ASTM B637 bar (UNS N07718), where applicable |
| Dimensional standard | ASME B18.31.2 · B16.5 bolting tables |
| Manufacturing route | To the finished specification where specified; otherwise machining from bar, where applicable |
| 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 a Stud Bolt
Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables.
- Fully threaded, with two heavy hex nuts
- Length per ASME B16.5 flange class
- UNC up to 1", UN-8 above
More on choosing: Stud bolt guide.
Inconel 718 Stud Bolt: Why 718 for stud bolts
Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables. 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 Stud 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 Stud 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 Stud Bolt — questions buyers ask
How is stud bolt length measured?
From first thread to first thread, excluding chamfered points, as tabulated in ASME B16.5.
What nut is used with Inconel 718 stud 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 stud bolts?
Finished fastener specification: ASTM A1014 (UNS N07718) where specified — product-type scope pending current standard text. Material / feedstock: ASTM B637 bar (UNS N07718), where applicable. Dimensions: ASME B18.31.2 · B16.5 bolting tables. State the finished specification, material and dimensions on your purchase order or project drawing.
What decides the price of a Inconel 718 stud 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