Inconel 718 Hex BoltUNS N07718 · ASME B18.2.1 · Manufacturer, trader & exporter, India
Alloy 718 · UNS N07718
An Inconel 718 hex bolt is a bolt with a hexagonal head. 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. Hex bolts join flanges, structures and equipment where one side is accessible for the head. Dimensions to ASME B18.2.1, or DIN 931 / 933 (legacy DIN) where an older specification calls for them.
- UNS N07718
- ASME B18.2.1
- 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 Hex Bolt?
- What it is
- A bolt with a hexagonal head
- 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 B18.2.1 · DIN 931 / 933 (legacy DIN)
- Grade
- Inconel 718 · UNS N07718
- Best at
- Very high strength at temperatures up to about 650 °C
Inconel 718 Hex Bolt Specification
| Product | Inconel 718 Hex 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 B18.2.1 · DIN 931 / 933 (legacy DIN) |
| 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 Hex Bolt
Hex bolts join flanges, structures and equipment where one side is accessible for the head. Dimensions to ASME B18.2.1, or DIN 931 / 933 (legacy DIN) where an older specification calls for them.
- Partially or fully threaded
- ASME B18.2.1 / DIN 931 / DIN 933
- Supplied with nuts and washers
More on choosing: Hex bolt guide.
Inconel 718 Hex Bolt: Why 718 for hex bolts
Hex bolts join flanges, structures and equipment where one side is accessible for the head. Dimensions to ASME B18.2.1, or DIN 931 / 933 (legacy DIN) where an older specification calls for them. 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 Hex 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 Hex 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 Hex Bolt — questions buyers ask
DIN 931 or DIN 933?
DIN 931 bolts are partly threaded; DIN 933 are fully threaded.
What nut is used with Inconel 718 hex 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 hex 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 B18.2.1 · DIN 931 / 933 (legacy DIN). State the finished specification, material and dimensions on your purchase order or project drawing.
What decides the price of a Inconel 718 hex 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