Super Duplex S32760 Flat Washers
ISO 7089 / ISO 7090ASTM A240
Super Duplex S32760 flat washers provide grade-matched bearing components for loaded marine and saline-process assemblies. They support the nut or bolt head over the required seat, with bore, outside diameter and thickness defined for the actual flange or bracket.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution annealed and quenched
EN 10204 3.1 MTC + heat-number traceability
Which standard is on your order?
Raw Material Specifications
Dimension Reference
Heat Treatment
Solution annealed and rapidly cooledSolution annealing followed by rapid cooling controls harmful precipitates and preserves the ferrite–austenite structure.
What we can make in Super Duplex S32760
Normal series
Use under bolt heads and nuts on machined equipment faces with adequate surrounding seat area. The bore must clear the bolt shank and under-head radius so the washer lies flat.
Larger outside diameter
Use over slots, oversized holes and softer mounting surfaces to spread the bearing load. Washer thickness matters as well as diameter: a thin wide washer can dish over an unsupported opening.
Square & special profiles
Use on channel supports, slotted bases and special mounting pads where a round washer leaves insufficient support. Profile and hole position keep the bearing plate seated across the actual opening.
- Geometry
- Bore × outside diameter × thickness
- Forms
- Round · Square · Drawing profiles
- Function
- Bearing surface · Spacing
- Sizing
- Metric · Inch
- Final condition
- Solution annealed and quenched
- Inspection
- Bore · Outside diameter · Thickness · Burrs
Manufacturing route
Small lots can be machined from suitable stock; repeat production uses cut or punched blanks with bore and outer edge finishing.
Heat treatment & final condition
Solution treatment and cooling control the duplex structure. Subsequent processing must preserve the ordered corrosion and mechanical condition.
Finished geometry
Thickness, flatness and edge finish establish the bearing geometry; the washer is not labelled hardened solely because the alloy is corrosion resistant.
Where Super Duplex S32760 fits — and what matters
Seawater pumps
Super Duplex S32760 Flat WashersS32760 washers give seawater-pump nuts a replaceable, grade-matched seat. Their strong super duplex section is useful under concentrated bearing pressure. The bore must clear the stud transition and the outside diameter must remain on the casing spotface so the washer carries load across a flat annulus.
Connection requirements
- Stud transition and bore clearance
- Spotface diameter
- Washer thickness and final condition
Seawater intake screens & gates
Super Duplex S32760 Flat WashersSeawater intake gates use mounting plates with slots and large clearance holes. An S32760 washer can distribute nut pressure across these openings where the project calls for that grade. Thickness is driven by the unsupported span, while the outside profile must fit the plate and leave enough material around its edges.
Connection requirements
- Slot span and mounting load
- Washer outline and thickness
- Support-plate material
Flue-gas desulfurization (FGD) ducts
Super Duplex S32760 Flat WashersFGD access-cover hardware may be wetted by acidic chloride condensate. S32760 washers are useful where this super duplex alloy has been selected for the local exposure. They provide a replaceable seat beneath the nut; condensate retained under that seat is the relevant environment for corrosion selection.
Connection requirements
- Condensate composition and temperature
- Nut seat and washer flatness
- Contact pressure and thickness
Same washer. Different material priorities.
Super Duplex S32760 material dataSuper Duplex 2507 Flat Washers
2507 washers combine high strength with super duplex chloride resistance for seawater covers, brackets and brine equipment. They are useful where the bearing face is highly loaded and 2205 offers insufficient corrosion margin. The underside is still a crevice, making temperature, deposits and chlorination relevant to the washer selection.
254 SMO Flat Washers
254 SMO flat washers provide replaceable bearing faces beneath bleach-plant and seawater-equipment fasteners. The six-moly austenitic grade offers greater resistance to localized chloride attack than common 316. Supported diameter, thickness and hardness are selected for the pressure applied by the nut or bolt head.
Inconel 625 Flat Washers
Inconel 625 washers provide replaceable bearing faces on seawater-pump covers and chemical flange joints. Their nickel-chromium-molybdenum corrosion resistance is useful where liquid remains beneath the nut after exposed surfaces dry. Thickness and outside diameter let the washer support the nut pressure on a compact spotface or span a wider support opening.
From drawing to documented delivery
- 01Drawing & BOMForm, dimensions and quantity
- 02Material & formingGrade, heat and manufacturing route
- 03Final inspectionGeometry, threads and ordered tests
- 04Documents & dispatchLot records and identified packing
Order documents
- Material identity
- UNS S32760 · heat number · ordered condition
- Final-part acceptance
- Final condition and any ordered phase-balance, corrosion or impact testing.
- Dimensional record
- Bore · Outside diameter · Thickness · Burrs
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your Super Duplex S32760 washer enquiry
Questions about Super Duplex S32760 flat washers
Should the washer use the same alloy as the bolt?
The wetted assembly may need matching corrosion resistance, but the washer also needs sufficient bearing strength and thickness. The bolt grade does not by itself specify a hardened or load-rated washer.