Super Duplex 2507 Washers
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Sunmach is a trusted global manufacturer and supplier of premium standard and custom Super Duplex 2507 Washers, engineered to deliver high-strength, corrosion-immune load distribution and dynamic locking capabilities in the world's most demanding environments. Drawing on over thirteen years of specialized stamping, precision forming, and controlled heat-treatment expertise, we manufacture high-integrity washers that protect critical bolted joints from unexpected relaxation. By utilizing premium-grade super duplex alloys with a balanced dual-phase atomic structure, these Super Duplex Washers distribute heavy clamping preloads uniformly across mating surfaces, preventing localized crushing and surface deformation under severe mechanical stress. Specifically designed to withstand the harsh conditions of deepwater subsea installations and sour-gas environments, our custom-finished washers provide outstanding resistance to localized pitting, stagnant crevice corrosion, and stress corrosion cracking where standard stainless steels and basic duplex alloys quickly fail. Whether specified for high-pressure process pipelines, deep-sea oil and gas risers, or volatile chemical reactors, these heavy-duty washers maintain their elastic spring tension and structural tightness over long-term lifecycles. Backed by rigorous quality validation and complete mill traceability, Sunmach ensures zero-failure performance, safeguarding mission-critical industrial assets against catastrophic downtime and hazardous leaks.
Super Duplex 2507 Washers
As an ISO 9001:2015 certified Super Duplex 2507 Washer manufacturer, Sunmach utilizes advanced stamping, precision blanking, edge finishing and comprehensive quality inspection to ensure dimensional accuracy and consistent performance. Every Super Duplex 2507 Washer undergoes chemical composition verification, mechanical testing, corrosion resistance evaluation, flatness inspection and dimensional checks with complete material traceability from raw material to finished product.
With exports across the GCC, Southeast Asia, Europe and North America, we supply standard and custom Super Duplex Stainless Steel Washers with rapid delivery, engineering support and dependable quality for critical industrial fastening applications.
To manufacture and timely deliver precision Standard or Custom Super Duplex 2507 Washers, we have advanced machinery, an experienced engineering team, R&D team, Prototyping team, Heat Treatment facility and all required Testing along with an efficient logistics team. All raw materials are sourced from the most reputable and renowned manufacturers in the world.
Super Duplex 2507 Plain Washer Specifications
Using advanced stamping and precision blanking technology, our Super Duplex 2507 Plain Washers are manufactured in various specifications including DIN 125, ISO 7089, ANSI B18.22 and IS standards in nominal diameters ranging from 1/4" to 4" (M6 to M100). We provide Plain Washers in both Imperial and metric sizes to accommodate diverse application needs. Our Super Duplex 2507 Washers are specially engineered to withstand aggressive chloride environments, high mechanical loads and seawater immersion, ensuring superior strength and reliability.
Super Duplex 2507 Plain Washer Application Industries
Sunmach serves a diverse range of markets including Offshore Oil & Gas, Desalination Plants, Chemical Processing, Semiconductor, Power Generation, Aerospace, Pharmaceutical, Food & Beverage, Marine, Pulp & Paper, Petrochemical & Refining, Air Pollution Control and Water Treatment.
Sizes
| Metric : | M6 to M100 |
| Imperial : | 1/4" to 4" |
| MOQ : | 1 Piece & Above |
| Certification : | EN 10204 3.1, EN 10204 3.2 (On Demand) |
Specification
| Washer | DIN | ISO | ANSI | IS |
|---|---|---|---|---|
| Plain Washer | 125 | 7089 | B18.22 | 2016 |
Dimensions - Imperial
Dimensions - Metric
Frequently Asked Questions
Common questions about Sunmach Super Duplex 2507 Plain Washers
They are used to distribute the clamping force of a tightened bolt over a wider surface area. This prevents the Bolt Head or Nut from crushing (dimpling) into softer joint materials, prevents stress concentrations and isolates dissimilar metals to stop galvanic corrosion. They are especially specified in offshore, desalination, chemical processing and marine environments where extreme corrosion resistance is essential.
They meet DIN 125, ISO 7089 and ANSI B18.22 Standards. They feature a high mechanical yield strength of approximately 550 MPa and outstanding hardness, making them more than twice as strong as standard 316L stainless steel. The PREN (Pitting Resistance Equivalent Number) of 42+ provides superior corrosion immunity compared to Duplex 2205 (PREN 35+).
Standard 300-series steels are highly susceptible to stress corrosion cracking and pitting in chloride or saltwater environments. Even Duplex 2205 may not be adequate for the most aggressive seawater or high-chloride applications. Super Duplex 2507 plain washers offer a PREN of 42+, providing outstanding corrosion immunity in seawater, desalination brines and concentrated chloride environments, alongside superior mechanical load-bearing capacity — making them the ideal choice for critical offshore and subsea fastening applications.
Plain flat washers are designed purely for static load distribution, surface protection and gap bridging. Spring washers (such as split-lock or Belleville washers) feature a curved or conical design that provides active spring tension to keep a joint tight under high vibration. Super Duplex 2507 plain washers are the preferred choice for high-strength, corrosion-resistant static bolted joints in aggressive environments.
We conduct 100% flatness checks and edge-deburring verification. This is combined with raw material chemical testing, tensile testing, hardness verification and complete mill certificate traceability (MTC 3.1) for every batch. As an ISO 9001:2015 certified manufacturer, every Super Duplex 2507 Washer undergoes chemical composition verification, corrosion resistance evaluation and dimensional checks with full material traceability from raw material to finished product.