Hardness testing to ISO 6508-1
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Vision Alloys is a trusted manufacturer and supplier of Super Duplex Steel UNS S32750 flats and spring washers in India and globally. These washers, engineered from premium-grade alloy 2507, stand out for their exceptional mechanical strength and extraordinary resistance to corrosion in extreme industrial environments. We provide services to a diverse array of industries, such as pulp and paper, petrochemicals, chemical processing, offshore, and marine, that require resistance to crevice corrosion and chloride stress corrosion.
Our Super Duplex Steel S32750 flat washers are designed for even load distribution and are used in high-pressure bolted assemblies. In the interim, our spring washers, which encompass a variety of styles, such as split, conical, and wave washers, provide resistance to vibration and loosening, thereby improving structural stability. Our washers are manufactured in accordance with international standards, including DIN 1.4410, ASME SA479, and ASTM A479. These washers offer enduring performance in challenging environments due to their mechanical properties, which include a minimum tensile strength of 800 MPa and a yield strength exceeding 550 MPa.
We offer a wide size range from M2 to M100 and provide customized dimensions and finishes on request. Mill Test Certificates (MTC), third-party inspection reports, and ISO compliance documents are provided to guarantee complete traceability and reliability of our washers, which are subjected to rigorous quality testing. Whether you require plain washers for general industrial use or specially coated spring washers for corrosive marine installations, Vision Alloys has the inventory and expertise to provide these products.
| Standard | : | ASTM A479 / SA479 |
| Dimension | : | ASTM,DIN, BS,GB, IS and all International Standards |
| Diameter | : | M2 to M100 |
| Heat Treatment | : | Annealing, Stress Relieving, Case Hardening, Quenching and Tempering. |
| Type | : | Plain Washer, Spring Washer, Tooth Washer, Tapper Washer, Tab Washer, Star Washer etc. |
As a leading Super Duplex Steel UNS S32750 flat and spring washer manufacturer and supplier in India, we maintain a large stock ready for dispatch with secure export-grade packaging. Our products are well accepted in domestic as well as international markets, offering both standard and tailor-made solutions for fastening applications. Contact us today to get the best prices and technical support for your washer requirements.
To preserve the high standards of our selection of industrial washers, we have always adhered to a systematic quality management process.
Our staff of experts is vibrant and talented, and they have always been our largest supporters and contributors to our success. Our vision is to create a world of washers.
| STANDARD | WERKSTOFF NR. | UNS | SAF |
| Super Duplex Steel S32750 | 1.4410 | S32750 | 2507 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S32750 | 0.030 max | 1.20 max | 0.80 max | 0.035 max | 0.020 max | 24.00 – 26.00 | 3.00 – 5.00 | 6.00 – 8.00 | 0.24 – 0.32 | 58.095 min |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S32750 | 7.8 | 0.281 | 1350 | 2460 |
Hardness testing to ISO 6508-1
Nut proof load testing to ISO 898-2
Suitability for preloading to EN 14399-2
Calibrated gauges and tools
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