Inconel 718 WasherASTM B637 · ASME B18.22.1 · Manufacturer, stockist & exporter, India
Alloy 718 · UNS N07718
An Inconel 718 washer is a flat or spring ring that spreads bolt load, made from Inconel 718 to ASTM B637. Flat washers protect the joint surface and spread load; spring and lock washers resist loosening. Match the washer material to the bolt to avoid galvanic corrosion.
- ASTM B637
- ASME B18.22.1
- 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 Washer?
- What it is
- A flat or spring ring that spreads bolt load
- Material
- ASTM B637
- Dimensions
- ASME B18.22.1 · DIN 125
- Grade
- Inconel 718 · UNS N07718
- Best at
- Very high strength at temperatures up to about 650 °C
Inconel 718 Washer Specification
| Product | Inconel 718 Washer |
|---|---|
| Material standard | ASTM B637 |
| Dimensional standard | ASME B18.22.1 · DIN 125 |
| 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 Washer
Flat washers protect the joint surface and spread load; spring and lock washers resist loosening. Match the washer material to the bolt to avoid galvanic corrosion.
- Flat, spring and lock
- ASME B18.21.1 · DIN 125 / 127
- Material to match the bolt
Inconel 718 Washer 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 Washer 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 Washers for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiInconel 718 Washer — questions buyers ask
Do I need washers on flange bolting?
Many specifications require through-hardened washers under nuts for controlled tightening; follow the project bolting spec.
Which standard covers Inconel 718 washers?
The material is ASTM B637; dimensions follow ASME B18.22.1 · DIN 125. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Inconel 718 washer?
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 washers 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