Name the required UNS designation
The catalogue lists S31803 and S32205. Include the required designation and product specification, even when the project informally uses the name 2205.
Two phases.
One precise specification.
Duplex stainless steel is a distinct material family. Define the exact UNS grade, fitting requirements and inspection scope when preparing your enquiry.
GRADE OVERVIEW
Start with the complete designation
The grade references below help structure an enquiry. They are not a statement of stock, equivalence or suitability for a particular service.
| Grade / detail | What to specify |
|---|---|
| UNS S31803 | Identify this designation explicitly if it is required by the project. |
| UNS S32205 | Specify this designation explicitly; do not rely on the name “2205” alone. |
| Additional project requirements | List any agreed heat-treatment, testing and acceptance requirements. |
Reference note: Outokumpu duplex grade guide. Use the project’s approved specification for selection.
SPECIFICATION DETAILS
Make the material requirement clear
Keep material identity and acceptance criteria together.
Define the acceptance requirements
Provide the project inspection and testing requirements with the initial enquiry so their scope can be reviewed alongside the dimensions.
FITTING FAMILIES
Choose the geometry for your connection
Material availability is confirmed against the selected fitting, dimensions and project requirements.
Elbows
Direction changes and radius configurations.
Explore fitting →Tees
Equal and reducing branch connections.
Explore fitting →Reducers
Concentric and eccentric diameter changes.
Explore fitting →Caps
Welded closures for pipe ends.
Explore fitting →Stub Ends
Neck and lap details for flange connections.
Explore fitting →Special Fittings
Drawing-specific geometries and requirements.
Explore fitting →ENQUIRY CHECKLIST
Prepare a complete material enquiry
Include the information needed to review your duplex steel requirement.
- Material designation
Exact grade, product specification, edition and any approved alternatives.
- Fitting configuration
Product type, sizes, wall thicknesses and applicable dimensional standard.
- Project conditions
Relevant service information and the approved material specification.
- Supply & inspection
Manufacturing condition, tests, certificates and marking requirements.
- Quantity & destination
Item quantities, required date and delivery location.
- Drawing references
Drawing numbers, revisions and any project-specific notes.
COMMON QUESTIONS
Before you specify duplex steel
Is duplex the same as super duplex?
No. They are separate grade groups within duplex stainless steels. Use the exact specified designation rather than substituting one family name for another.
Does this page confirm stock or delivery time?
No. Availability and delivery depend on the exact fitting, grade, dimensions, quantity and documentation requirements. These must be confirmed in the quotation.
Which fitting sizes are available in this material?
Send the required fitting type, end sizes and wall thicknesses. Availability is reviewed for that combination; a material family does not define a universal size range.
What certificates should I request?
Specify the certificate type, material traceability, inspection and testing required by the project. Include supplementary requirements with the initial enquiry.
BUILD YOUR ENQUIRY
Have a duplex steel requirement?
Prepare the exact grade, fitting dimensions and project specification for review.
Prepare your enquiry →