Duplex Stainless Steel material center
Duplex and super duplex components for chloride-bearing service.
Compare Duplex 2205 and Super Duplex 2507 for industrial flanges, pipe fittings, and valves—then align the alloy, product form, heat treatment, and test documentation.
- ASTM / ASMESpecification-led supply
- 2 grade routesOne focused source
- Global projectsExport documentation
Product routes
Start with the component. Then lock the material.
These links use the existing catalog structure. No additional material-by-product taxonomy archives are created.
Flanges
Weld neck, blind, slip-on, threaded, lap joint, and socket weld flange routes.
Browse flanges 02Pipe fittings
Elbows, tees, reducers, and end caps for welded or specified piping systems.
Browse pipe fittings 03Valves
Ball, gate, globe, check, and butterfly valve routes for process service.
Browse valvesGrade selector
Duplex Stainless Steel grade routes.
Use the cards to build a shortlist. Final suitability remains an engineering and code decision.
Duplex 2205
UNS S31803 / S32205 · ASTM A182 F51
The established duplex family for applications needing more strength and chloride resistance than common austenitic stainless grades, subject to service and fabrication review.
Super Duplex 2507
UNS S32750 · ASTM A182 F53
A highly alloyed super duplex grade considered when pitting, crevice corrosion, chloride stress-corrosion cracking, and strength drive the material shortlist.
2205 is a widely used duplex route for many process and chloride-bearing systems. 2507 is a more highly alloyed super duplex option for more severe chloride and corrosion duties. Temperature limits, welding procedure, design code, and actual media must decide the final grade.
Procurement comparison
Translate the material name into order data.
The same commercial alloy name can map to different forging, fitting, and casting designations. State the complete material and product-form specification.
| Grade | Selection cue | Typical project context | Procurement control |
|---|---|---|---|
| Duplex 2205 | General duplex service | Chemical processing, water treatment, pulp and paper, offshore utilities, and selected chloride-bearing systems. | State the exact UNS grade, product specification, heat treatment, PMI, and any ferrite or corrosion-testing requirements. |
| Super Duplex 2507 | Severe chloride service | Seawater systems, desalination, offshore production, chemical processing, and demanding chloride environments. | Verify the exact UNS, solution treatment, welding controls, testing, and project acceptance criteria rather than ordering only by the name “2507.” |
Engineering note: This page supports early-stage procurement. The responsible engineer must verify corrosion, pressure, temperature, fabrication, compatibility, and code requirements.
RFQ readiness
Five controls for a comparable quotation.
A precise technical basis prevents substitutions and makes supplier offers easier to compare.
Send your requirement to SASA FLANGE- 01Component and quantity
Product type, size range, quantity, facing or end connection, and dimensional standard.
- 02Exact material route
ASTM specification, grade, UNS number where applicable, product form, and heat-treatment condition.
- 03Design conditions
Fluid, concentration, contaminants, design pressure and temperature, minimum metal temperature, and operating cycle.
- 04Fabrication controls
Welding, post-weld heat treatment, hardness, cleanliness, pickling or passivation, and repair restrictions.
- 05Inspection and records
Material certificates, PMI, NDE, pressure testing, corrosion tests, traceability, marking, and third-party inspection.
Standards map
Start with the governing product standard.
Official standards define scope and requirements. The purchase order should name the applicable edition required by the project.
Forged or rolled alloy and stainless steel flanges, fittings, valves, and parts.
Wrought fittingsASTM A815/A815MWrought ferritic, ferritic-austenitic, and martensitic stainless steel piping fittings.
Valve castingsASTM A995/A995MDuplex stainless steel castings for pressure-containing parts.
Technical FAQ
Direct answers for early material screening.
Structured for buyers, engineers, search engines, and future answer-engine retrieval.
What is Duplex Stainless Steel?
Duplex stainless steels use a mixed austenitic-ferritic microstructure to combine elevated strength with useful corrosion resistance. Their performance depends on composition, solution heat treatment, fabrication control, and preservation of the intended phase balance.
How do I choose between the listed Duplex Stainless Steel grades?
2205 is a widely used duplex route for many process and chloride-bearing systems. 2507 is a more highly alloyed super duplex option for more severe chloride and corrosion duties. Temperature limits, welding procedure, design code, and actual media must decide the final grade.
Can the same alloy designation be used for flanges, fittings, and valves?
The same alloy family can be used across a pressure system, but the ASTM grade designation can change with product form and manufacturing route. Confirm the forging, wrought-fitting, or casting specification together with the dimensional standard and pressure rating.
What should a Duplex Stainless Steel RFQ include?
Include component type, exact grade and UNS where applicable, ASTM product specification, size, schedule or bore, pressure class, facing or end connection, quantity, service conditions, heat treatment, testing, certification, marking, and inspection requirements.
Does the material standard also define flange, fitting, or valve dimensions?
Usually not. The purchase specification normally combines a material standard with a dimensional or pressure-rating standard such as ASME B16.5, B16.9, B16.11, B16.34, an EN or DIN standard, or a project-specific specification.
Procurement support
Turn the material shortlist into a controlled RFQ.
Send your component list, service conditions, project standards, and inspection requirements for a specification-led quotation.