Super Duplex 2507 Hex flange bolts
ISO 4162ASTM A276
2507 flange bolts combine duplex strength and chloride-corrosion resistance at marine brackets and wet skid connections. The broad flange underside creates a sheltered interface that must be included in the corrosion assessment.
- 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
Finished-Bolt Specifications
Threads · Metric
Threads · Inch
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 2507
Integral flange
Use on mounting brackets and equipment covers to distribute head load over a wider seat and reduce loose parts during assembly. The flange needs a flat landing clear of nearby walls and radii.
Plain bearing face
Choose a plain underside for finished or coated seats where teeth would mark the surface. It also permits controlled sliding at the head-seat interface during tightening.
Flange vs loose washer
An integral flange speeds repeated assembly by keeping the bearing surface with the bolt. Retain a separate washer when the joint needs a replaceable wear face or a specifically hardened bearing layer.
- Head
- Hex drive · Integral flange
- Bearing face
- Plain or specified surface profile
- Length basis
- Under flange
- Threads
- Metric · UNC · UNF · UNJ
- Final condition
- Solution annealed and quenched
- Inspection
- Thread gauges · Head and shank dimensions
Manufacturing route
CNC machining suits samples; a volume heading or forging route must preserve duplex phase balance through forming and final thermal processing.
Heat treatment & final condition
Solution treatment and cooling control the duplex structure. Subsequent processing must preserve the ordered corrosion and mechanical condition.
Finished geometry
Head geometry, bearing face, shank and thread fit are checked after the final machining and thermal operations.
Where Super Duplex 2507 fits — and what matters
Offshore & Marine
Deck-equipment brackets and marine pump skidsSuper Duplex 2507 hex flange bolts clamp deck-equipment brackets and marine pump skids through an integral flange that spreads head load over the mounting face. The assembled contact is exposed to saltwater, deposits and neighbouring metals.
Water Treatment & Desalination
Membrane-skid and pump supportsSuper Duplex 2507 hex flange bolts clamp membrane-skid and pump supports through an integral flange that spreads head load over the mounting face. The water stream, cleaning cycle and retained liquid define exposure at the installed part.
Oil & Gas
Utility skids and instrument supportsSuper Duplex 2507 hex flange bolts clamp utility skids and instrument supports through an integral flange that spreads head load over the mounting face. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Same hex flange bolt. Different material priorities.
Super Duplex 2507 material dataInconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Clamp load spread over the integral flange
- Annealed or solution-annealed 625
- The delivery condition affects strength and high-temperature response. Keep the specified condition with the component’s mechanical acceptance; 718-style aging is not the strengthening route for 625. Include liquid retained at the broad flange underside and its edge against the member in the exposure description.
Monel K-500
Age-hardened strength in the nickel–copper alloy family.
- Connection priority
- Clamp load spread over the integral flange
- Strength and hydrogen exposure
- K-500 gains strength through aging. Cathodic protection, hydrogen exposure and the ordered condition need joint consideration in highly loaded marine components. Include liquid retained at the broad flange underside and its edge against the member in the exposure description.
Duplex 2205
Duplex strength and chloride-corrosion resistance.
- Connection priority
- Clamp load spread over the integral flange
- S31803 or S32205
- The specified UNS fixes the chemistry. Solution treatment, section size and the ordered mechanical or corrosion tests establish the final duplex condition. Include liquid retained at the broad flange underside and its edge against the member in the exposure description.
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 S32750 · heat number · ordered condition
- Final-part acceptance
- Final condition and any ordered phase-balance, corrosion or impact testing.
- Dimensional record
- Thread gauges · Head and shank dimensions
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your Super Duplex 2507 hex flange bolt enquiry
Questions about Super Duplex 2507 hex flange bolts
Can the flange replace a separate washer?
Only when its bearing footprint and the supported surface meet the assembly requirement. A serrated seat can damage a coating, while a thin or slotted member may need a different bearing arrangement.