Inconel 718 Socket Head Cap ScrewASTM B637 · ASME B18.3 · Manufacturer, stockist & exporter, India
Alloy 718 · UNS N07718
An Inconel 718 socket head cap screw is a screw with a cylindrical head and hexagon socket, made from Inconel 718 to ASTM B637. Allen-type cap screws are used where the head must sit flush or space is tight.
- ASTM B637
- ASME B18.3
- 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 Socket Head Cap Screw?
- What it is
- A screw with a cylindrical head and hexagon socket
- Material
- ASTM B637
- Dimensions
- ASME B18.3 · DIN 912 / ISO 4762
- Grade
- Inconel 718 · UNS N07718
- Best at
- Very high strength at temperatures up to about 650 °C
Inconel 718 Socket Head Cap Screw Specification
| Product | Inconel 718 Socket Head Cap Screw |
|---|---|
| Material standard | ASTM B637 |
| Dimensional standard | ASME B18.3 · DIN 912 / ISO 4762 |
| 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 a Socket Head Cap Screw
Allen-type cap screws are used where the head must sit flush or space is tight.
- Hex socket drive
- ASME B18.3 · DIN 912
- Metric and inch
Inconel 718 Socket Head Cap Screw Chemical Composition
| Element | Weight % |
|---|---|
| Nickel (+Co) | 50.0 – 55.0 |
| Chromium | 17.0 – 21.0 |
| Niobium + Tantalum | 4.75 – 5.50 |
| Molybdenum | 2.80 – 3.30 |
| Titanium | 0.65 – 1.15 |
| Aluminium | 0.20 – 0.80 |
| Carbon | 0.08 max |
| Iron | Balance |
Inconel 718 Socket Head Cap Screw Mechanical Properties
| Solution-treated and aged | Value |
|---|---|
| Tensile strength | 1275 MPa · 185 ksi |
| Yield strength 0.2% | 1034 MPa · 150 ksi |
| Elongation | 12% |
Full chemistry, properties and equivalents are on the Inconel 718 grade page.
Standards on this page
Other Inconel 718 fasteners
Inconel 718 Socket Head Cap Screws for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiInconel 718 Socket Head Cap Screw — questions buyers ask
DIN 912 and ISO 4762 — are they the same?
Yes, ISO 4762 replaced DIN 912 with the same main dimensions.
Which standard covers Inconel 718 socket head cap screws?
The material is ASTM B637; dimensions follow ASME B18.3 · DIN 912 / ISO 4762. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Inconel 718 socket head cap screw?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
Can you supply Inconel 718 socket head cap screws to NACE MR0175?
Yes. Inconel 718 is listed in NACE MR0175 / ISO 15156-3 within its limits; state NACE compliance on the order and it is confirmed on the certificate.
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