UNS S31803 Duplex Washers
Premium-Grade UNS S31803 Duplex Washers Built to Perform
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Bespoke Manufacturing
Instant Quote Service
Worldwide Delivery
Various Gauges/Thicknesses
Bespoke Manufacturing
Instant Quote Service
Worldwide Delivery
Various Gauges/Thicknesses
As a leading UNS S31803 duplex washers supplier in the UK, we deliver precision-engineered parts with fast turnaround, dependable certification, and full technical support.
What Are UNS S31803 Duplex Washers?
UNS S31803 duplex washers are load-distributing flat components made from a duplex stainless steel alloy. Duplex steels combine austenitic and ferritic structures, giving the material high strength and exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.
Why Choose UNS S31803?
- High tensile strength: nearly twice that of standard 316 stainless steel.
- Excellent corrosion resistance: ideal for chloride-rich environments.
- Strong resistance to stress corrosion cracking.
- Durable in high-pressure, high-temperature, and vibration-heavy systems.
- Reduced maintenance: long-term performance in aggressive settings.
Benefits of Using UNS S31803 Duplex Washers
1. Superior Corrosion Resistance
Outperforms 316L and 304 in marine and chemical environments. Prevents pitting, crevice corrosion, and cracking.
2. High Strength and Pressure Resistance
Withstands high clamping forces and pressure without deformation, even in dynamic and vibration-prone environments.
3. Excellent Thermal and Mechanical Stability
Performs consistently in both high-heat and sub-zero conditions. Suitable for thermal cycling and mechanical shock.
4. Fatigue and Impact Resistance
Handles repeated stress, making it ideal for applications involving movement, pressure changes, or vibration.
5. Cost-Efficient Performance
Longer lifespan reduces the need for frequent replacements. Lower maintenance costs and improved uptime.
6. Versatile Application
Used across a wide range of sectors and suited for flat, shim, or spring washer configurations.
Common Applications of UNS S31803 Duplex Washers
These washers are used wherever load-bearing fasteners are exposed to corrosive, high-pressure, or variable temperature environments:
Industry Material Options and Why S31803 Stands Out
| Industry Sector | Common Materials Used | Why Choose S31803 |
|---|---|---|
| General Manufacturing | Carbon Steel, 304/316, S31803 | Better corrosion and fatigue resistance |
| Oil & Gas | Inconel, Hastelloy, S31803 | Stronger than 316, more economical than superalloys |
| Chemical Processing | 316L, Titanium, S31803 | Excellent chemical resistance, strength balance |
| Marine & Offshore | 316L, Cu-Ni, S31803 | Superior seawater resistance and strength |
| Desalination & Water | Duplex 2205, Super Duplex, S31803 | Long-term chloride resistance and pressure support |
| Power Generation | 316L, Carbon Steel, S31803 | Dual resistance to temperature and chemicals |
Addressing Common Buyer Concerns
| Concern | Our Solution |
|---|---|
| Higher upfront cost than 316 or 304 | Lower lifecycle cost, fewer replacements, better uptime |
| Limited stock or availability | Fast UK-based production and stocked core sizes |
| Difficult machining or fabrication | In-house duplex processing expertise and CNC precision |
| Unsure if it’s the right grade | Full technical consultation and material comparison support |
| Scepticism about imported quality | British manufacturing, certified material, and full traceability |
Why Choose Stephens Gaskets?
As a UK-based UNS S31803 duplex washers manufacturer, we provide:
- Decades of duplex steel machining experience.
- ISO 9001-certified production with tight quality control.
- Custom and standard dimensions available fast.
- Technical consultation and application-based guidance.
- Nationwide and international delivery options.
- Trusted by leading offshore, energy, and chemical brands.
From specification to supply, we offer complete washer solutions engineered to last.
FAQs About UNS S31803 Duplex Washers
What is duplex stainless steel, and how is UNS S31803 different?
Is UNS S31803 better than 316L?
Can I get custom sizes or shapes?
What surface finishes are available?
Is material certification available?
What are typical lead times?
Can I use UNS S31803 for high-pressure systems?
Do you help with washer material selection?
Contact Stephens Gaskets
Need corrosion-resistant washers for a demanding industrial project?
Let’s talk.