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Illustrative high-performance alloy flange and elbow in a process engineering setting

Material grades

Duplex 2205 / UNS S31803 / S32205 Material Data

Duplex 2205 / UNS S31803 / S32205 is presented as a material data page for teams assessing strength and chloride-corrosion review beyond conventional austenitic stainless. It links alloy identity, product-form review, quality records, and application context without presenting an unreviewed service claim as a final material approval.

Technical snapshot

Key details for your specification.

UNS designation

S31803 / S32205

Alloy family

Duplex stainless steel

Selection context

strength and chloride-corrosion review beyond conventional austenitic stainless

Typical review setting

pressurized chloride-bearing and process lines

Products and size range

Standard scope for a more complete RFQ.

Each material has its own controlled capability record, giving buyers standard dimensional context before final RFQ specification review.

Flanges

Standard dimensional coverage, pressure-class architecture, facing options, and bore review.

ASME B16.5: NPS 1/2 through NPS 24

ASME B16.47: NPS 26 through NPS 60

Final RFQ confirmation

Butt-weld fittings

Standard NPS / DN architecture, fitting geometry, schedule or wall, and end preparation control.

ASME B16.9: NPS 1/2 through NPS 48

Final RFQ confirmation

Forged fittings

Socket-weld and threaded fitting architecture with class and end-connection review.

ASME B16.11: NPS 1/8 through NPS 4

Final RFQ confirmation

NPS / DN conversion is controlled centrally. Class, bore, schedule, facing, end connection, and RTI capability are reviewed together in the RFQ.

Request custom size

Controlled size architecture

Flange size / class matrix

NPS 1/2 through NPS 24 under ASME B16.5. Standard dimensions are shown for specification planning; availability, manufacturing route, and delivery are confirmed against the final RFQ specification.

Final RFQ confirmation

Class / schedule scope

Classes 150, 300, 400, 600, 900 and 1500. Class 2500 requires the applicable NPS and current governing table to be checked.

Facing / end scope

RF / RTJ as applicable

ASME B16.5 flanges nominal size and configuration guide
Nominal sizeDNProductStandardRFQ review
1/2"DN 15FlangeASME B16.5Final RFQ
3/4"DN 20FlangeASME B16.5Final RFQ
1"DN 25FlangeASME B16.5Final RFQ
1-1/4"DN 32FlangeASME B16.5Final RFQ
1-1/2"DN 40FlangeASME B16.5Final RFQ
2"DN 50FlangeASME B16.5Final RFQ
2-1/2"DN 65FlangeASME B16.5Final RFQ
3"DN 80FlangeASME B16.5Final RFQ
4"DN 100FlangeASME B16.5Final RFQ
5"DN 125FlangeASME B16.5Final RFQ
6"DN 150FlangeASME B16.5Final RFQ
8"DN 200FlangeASME B16.5Final RFQ
10"DN 250FlangeASME B16.5Final RFQ
12"DN 300FlangeASME B16.5Final RFQ
14"DN 350FlangeASME B16.5Final RFQ
16"DN 400FlangeASME B16.5Final RFQ
18"DN 450FlangeASME B16.5Final RFQ
20"DN 500FlangeASME B16.5Final RFQ
22"DN 550FlangeASME B16.5Final RFQ
24"DN 600FlangeASME B16.5Final RFQ

This table records nominal standard scope, not a promise that every type, class, facing, bore, or material combination is available.

Use the RFQ selector to state product form, NPS / DN, class or schedule, facing or end connection, testing, and documents for review.

Controlled size architecture

Butt-weld fitting size / schedule matrix

NPS 1/2 through NPS 48 under ASME B16.9. Standard dimensions are shown for specification planning; availability, manufacturing route, and delivery are confirmed against the final RFQ specification.

Final RFQ confirmation

Class / schedule scope

Schedule or wall thickness as specified for the fitting geometry

Facing / end scope

Butt-weld bevel

ASME B16.9 butt-weld fittings nominal size and configuration guide
Nominal sizeDNProductStandardRFQ review
1/2"DN 15Butt-weld fittingASME B16.9Final RFQ
3/4"DN 20Butt-weld fittingASME B16.9Final RFQ
1"DN 25Butt-weld fittingASME B16.9Final RFQ
1-1/4"DN 32Butt-weld fittingASME B16.9Final RFQ
1-1/2"DN 40Butt-weld fittingASME B16.9Final RFQ
2"DN 50Butt-weld fittingASME B16.9Final RFQ
2-1/2"DN 65Butt-weld fittingASME B16.9Final RFQ
3"DN 80Butt-weld fittingASME B16.9Final RFQ
4"DN 100Butt-weld fittingASME B16.9Final RFQ
5"DN 125Butt-weld fittingASME B16.9Final RFQ
6"DN 150Butt-weld fittingASME B16.9Final RFQ
8"DN 200Butt-weld fittingASME B16.9Final RFQ
10"DN 250Butt-weld fittingASME B16.9Final RFQ
12"DN 300Butt-weld fittingASME B16.9Final RFQ
14"DN 350Butt-weld fittingASME B16.9Final RFQ
16"DN 400Butt-weld fittingASME B16.9Final RFQ
18"DN 450Butt-weld fittingASME B16.9Final RFQ
20"DN 500Butt-weld fittingASME B16.9Final RFQ
22"DN 550Butt-weld fittingASME B16.9Final RFQ
24"DN 600Butt-weld fittingASME B16.9Final RFQ
26"DN 650Butt-weld fittingASME B16.9Final RFQ
28"DN 700Butt-weld fittingASME B16.9Final RFQ
30"DN 750Butt-weld fittingASME B16.9Final RFQ
32"DN 800Butt-weld fittingASME B16.9Final RFQ
34"DN 850Butt-weld fittingASME B16.9Final RFQ
36"DN 900Butt-weld fittingASME B16.9Final RFQ
38"DN 950Butt-weld fittingASME B16.9Final RFQ
40"DN 1000Butt-weld fittingASME B16.9Final RFQ
42"DN 1050Butt-weld fittingASME B16.9Final RFQ
44"DN 1100Butt-weld fittingASME B16.9Final RFQ
46"DN 1150Butt-weld fittingASME B16.9Final RFQ
48"DN 1200Butt-weld fittingASME B16.9Final RFQ

Elbows, tees, reducers, caps, returns, and stub ends do not share identical dimensional availability. Confirm the exact fitting geometry before quotation.

Use the RFQ selector to state product form, NPS / DN, class or schedule, facing or end connection, testing, and documents for review.

Engineering discussion

Context before component selection.

Engineering context

Duplex 2205 should be reviewed against the actual service definition rather than selected by alloy-family shorthand. The published material data supports high-level material identification and selection context; the supplied lot is accepted only against the purchase standard, material certificate, and approved project requirements.

Specification controls

For Duplex 2205 / UNS S31803 / S32205, the RFQ must turn S31803 / S32205 into a defined material, product-form, dimensional, inspection, document-release, quantity, packing, and delivery record. This avoids using a general alloy or product label as an unapproved technical conclusion.

Procurement decision

Before issuing an order for Duplex 2205 / UNS S31803 / S32205, reconcile Duplex stainless steel with the drawing or piping class, standard edition, test plan, acceptance authority, and certificate requirements. Any deviation, alternative material, or added test is a project engineering decision.

Standards and release

Define the basis, then document it.

Product-form route

ASTM A182 / ASME SA182 and ASTM A815 / ASME SA815 as applicable

Flange dimensions

ASME B16.5 or the approved drawing basis

Fitting dimensions

ASME B16.9 or ASME B16.11 where applicable

Applications and next steps

Connect the requirement to the right workflow.

pressurized chloride-bearing and process lines

Specification-led flange packages

Traceable alloy pipe fitting enquiries

Drawing-based process components

Material comparisonCompare material selection factors.Alloy productsReview flange and fitting product routes.Technical RFQPrepare a reviewable request.

Buyer questions

Frequently asked questions.

When is Duplex 2205 considered during material selection?

Duplex 2205 is considered when the defined service, corrosion mechanism, product form, temperature, pressure, and project standard support the material route. Final selection requires project-specific engineering approval.

What should an RFQ for Duplex 2205 state?

State UNS S31803 / S32205, product form, the applicable material and dimensional standards, size, class or schedule, inspection scope, MTC, PMI, documentation, packing, and destination.

How should Duplex 2205 traceability be checked?

Reconcile the heat number, material identification, product form, ordered standard, MTC, PMI record where specified, permanent marking, quantity, and final document register.

Technical quotation

Turn this guidance into a controlled request.

Capture the material, product form, dimensions, standard, inspection, documentation, packing, and destination requirements for review.

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Technical quotation desk

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