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Aisha Nickel Alloys is a trusted manufacturer and supplier of Duplex Steel Washers in Muscat, Oman, offering durable and corrosion-resistant fastening components for demanding industrial environments. These washers are manufactured using precision cutting and finishing processes to ensure accurate dimensions, smooth surfaces, and reliable performance. Aisha Nickel Alloys follows strict international quality standards to deliver washers that provide long service life and consistent quality. With efficient supply capabilities, timely delivery, and a customer-focused approach, the company supports oil and gas, marine, chemical, and construction industries worldwide.
Duplex steel washers are made of a balanced mixture of austenite and ferritic phases, generally containing 22-25% chromium, 4-7% nickel, and 3-5% molybdenum, where the carbon content is low it provides a strength a high tensile strength, typically around 620 -850 MPa, as well as Excellent corrosion resistance, especially against stress corrosion cracking and pitting, their mechanical properties also include excellent ductility and toughness. Advantages include excellent corrosion resistance, high strength, durability and low cost, making them ideal for use in harsh environments such as the marine and chemical industries.
| Dimension | : | ASTM, DIN, BS, GB, IS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Washer Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Heat Treatment | : | Annealing, Stress Relieving, Case Hardening, Quenching and Tempering. |
| Type | : | Plain Washer, Spring Washer, Tooth Washer, Tapper Washer, Tab Washer, Star Washer etc. |
Duplex steel washers are produced from a chromium-nickel-molybdenum alloy with a balanced austenitic and ferritic microstructure. This composition offers high strength, excellent load distribution, and superior resistance to stress corrosion cracking. The presence of molybdenum and nitrogen enhances resistance to pitting and crevice corrosion, especially in chloride-rich environments. Duplex steel washers maintain good toughness, fatigue resistance, and dimensional stability under high pressure and fluctuating temperature conditions.
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Duplex steel washers are widely used in applications where strength, corrosion resistance, and secure fastening are essential. They are commonly used in oil and gas pipelines, offshore platforms, and marine structures due to their excellent resistance to seawater and harsh chemicals. In chemical and petrochemical plants, these washers are used with flanges, valves, and pressure equipment. Duplex steel washers are also suitable for construction, desalination plants, power generation facilities, and heavy engineering projects, ensuring even load distribution and long-term reliability.
