Super Duplex 2507 WasherASTM A276 · ASME B18.22.1 · Manufacturer, stockist & exporter, India
UNS S32750 · W.Nr 1.4410
A Super Duplex 2507 washer is a flat or spring ring that spreads bolt load, made from Super Duplex 2507 to ASTM A276 / A479. 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 A276
- 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 a Super Duplex 2507 Washer?
- What it is
- A flat or spring ring that spreads bolt load
- Material
- ASTM A276 / A479
- Dimensions
- ASME B18.22.1 · DIN 125
- Grade
- Super Duplex 2507 · UNS S32750
- Best at
- Seawater and high-chloride service where strength also matters
Super Duplex 2507 Washer Specification
| Product | Super Duplex 2507 Washer |
|---|---|
| Material standard | ASTM A276 / A479 |
| 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
Super Duplex 2507 Washer Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 24.0 – 26.0 |
| Nickel | 6.0 – 8.0 |
| Molybdenum | 3.0 – 5.0 |
| Nitrogen | 0.24 – 0.32 |
| Copper | 0.50 max |
| Carbon | 0.030 max |
| Manganese | 1.20 max |
| Silicon | 0.80 max |
Super Duplex 2507 Washer Mechanical Properties
| Solution-annealed plate & sheet | Value |
|---|---|
| Tensile strength | 795 MPa · 116 ksi |
| Yield strength 0.2% | 550 MPa · 80 ksi |
| Elongation | 15% |
| Hardness | 310 HB max |
Full chemistry, properties and equivalents are on the Super Duplex 2507 grade page.
Standards on this page
Other Super Duplex 2507 fasteners
Super Duplex 2507 Washers for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSuper Duplex 2507 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 Super Duplex 2507 washers?
The material is ASTM A276 / A479; 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 Super Duplex 2507 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 Super Duplex 2507 washers to NACE MR0175?
Yes. Super Duplex 2507 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