Duplex Stainless Steel Flat Washers
Duplex stainless steel flat washers are widely used mechanical components designed to evenly distribute the load of a threaded fastener such as a bolt or a nut. Built from high-performance duplex stainless steel, they offer exceptional strength, corrosion resistance, and durability in both marine and industrial environments. These washers are particularly effective in applications requiring both high mechanical strength and excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.
At Flybear Fastener, we specialize in providing premium quality washers that deliver consistent performance and reliability for demanding engineering projects.
Product Specifications Table
| Specification | Description |
|---|---|
| Product Name | Duplex Stainless Steel Flat Washers |
| Standard | DIN 125 / ISO 7089 / ASME B18.22.1 |
| Material | Duplex Stainless Steel (2507 / 2205) |
| Sizes Available | M2 – M160 |
| Hardness | ≥ 250 HB |
| Finish | Plain / Passivated |
| Thickness | 0.5mm – 6mm |
| Tolerance | ±0.1mm |
Technical Parameters Table
| Property | Value |
|---|---|
| Yield Strength | ≥ 450 MPa |
| Tensile Strength | ≥ 620 MPa |
| Elongation | ≥ 25% |
| Impact Toughness | ≥ 60 J (at -46°C) |
| Corrosion Resistance | Excellent (PREN > 34) |
| Magnetic Properties | Slightly magnetic due to duplex structure |
Material and Manufacturing Process
Duplex stainless steel is a combination of austenitic and ferritic structures, offering a balanced range of mechanical and corrosion-resistant properties. The alloy composition typically includes approximately 22% chromium, 5-6% nickel, and 3% molybdenum, enhancing its resistance to chloride stress corrosion and making it ideal for chemical processing and offshore applications.
The manufacturing process for duplex stainless steel flat washers begins with precision cold or hot forging, followed by CNC machining to ensure tight tolerances. After forming, the washers undergo surface treatment processes including pickling, passivation, or other customer-specified finishes to ensure long-term performance and corrosion resistance.
Applications and Industries
Duplex stainless steel flat washers are commonly used in a wide range of industries including:
- Offshore oil & gas platforms
- Chemical and petrochemical plants
- Shipbuilding and marine engineering
- Power generation (nuclear, thermal, wind)
- Water treatment facilities
- Food and pharmaceutical equipment
- Construction and heavy machinery
Their corrosion-resistant and high-tensile qualities make them ideal for harsh and critical operating environments.
Superior Features and Competitive Advantages
Duplex Stainless Steel Washer Benefits
✔️ Premium Material Selection: Made from high-grade UNS S32205 or S31803 duplex stainless steel, offering superior anti-corrosion properties.
✔️ Precision Manufacturing: Each washer is manufactured under strict tolerance control, ensuring a smooth fit on bolts and nuts for secure fastening.
✔️ Advanced Surface Treatments: Available in pickled or passivated finish, providing excellent resistance to chemical corrosion and oxidation.
✔️ Custom Fabrication: We offer exceptional OEM/ODM capabilities. Washers can be made-to-order based on client drawings or specifications.
✔️ Ample Stock & Fast Dispatch: Our extensive warehouse ensures fast delivery, reducing lead times and supporting urgent project needs.
✔️ Comprehensive Support: From pre-sale engineering consultation to post-sale installation assistance, our technical team is always ready.
Quality Assurance & Inspection Excellence
At Flybear Fastener, we adhere to a strict quality control process throughout the production cycle. All duplex stainless steel flat washers are inspected using precision instruments including micrometers, tensile testers, salt spray chambers, and spectrometers. We comply with international quality standards such as ISO 9001:2015 and third-party testing certifications can be provided upon request.
Every washer goes through:
- Dimensional inspection
- Mechanical property testing
- Surface finish analysis
- Material composition verification
Selection and Buying Guide
Choosing the right flat washer depends on several factors:
- Load requirement and bolt size
- Environmental exposure (salt water, chemicals, temperature)
- Compliance with industry standards or client specifications
- Finish preference (plain, passivated, etc.)
When in doubt, consult our experienced sales engineers before purchasing. We also support OEM production and bulk order pricing for long-term projects.
Conclusion: Why Choose Flybear Fastener
As a trusted global supplier, Flybear Fastener is dedicated to delivering quality-driven engineering solutions for fastener requirements. Our fastener products are engineered to meet the stringent demands of various industries. With a strong emphasis on research, precision manufacturing, and proactive customer support, we aim to be your reliable partner for every project.
We consistently uphold the philosophy: “Quality First, Customer Supreme,” and provide tailored solutions for all fastening challenges.
For further inquiries, quotes, or specific application support, feel free to contact us today. Explore our product range and discover how Flybear Fastener can support your business needs.
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