Duplex & Super Duplex.
Ferritic-austenitic stainless families selected where strength and resistance to chloride-related corrosion shape the requirement.
Identify grade and condition together.
Designations are preliminary cross-references for enquiry routing. The governing product specification, exact grade designation, condition or temper, dimensions and application requirements must be stated together.
| Family / common name | UNS or alloy designation | EN / international reference | Selection context |
|---|---|---|---|
| Lean duplex 2101 | S32101 | 1.4162 | Lower-alloy duplex route |
| Duplex 2304 | S32304 | 1.4362 | Molybdenum-lean duplex route |
| Duplex 2205 | S32205 / S31803 | 1.4462 | Widely specified duplex family |
| Super Duplex 2507 | S32750 | 1.4410 | High-alloy super-duplex family |
| Super Duplex | S32760 | 1.4501 | Tungsten/copper-containing super-duplex route |
| High-alloy duplex | S32906 | 1.4477 | Application-specific high-alloy route |
Designation relationships require verification against the governing specification. Technical data is provided for preliminary sourcing guidance. The applicable customer specification, drawing, purchase order and latest standard revision govern each requirement.
Material translated into usable forms.
| Product form | Representative standards | Typical application context |
|---|---|---|
| Plate, sheet and coil | A240 / EN 10088-2 | Vessels, tanks and fabricated equipment |
| Bar and shapes | A276 / A479 | Machined parts, shafts and fasteners |
| Forgings and flanges | A182 F51/F53/F55 | Pressure connections and valve parts |
| Pipe and tube | A789 / A790 / A928 | Process, heat-transfer and offshore systems |
| Fittings and castings | A815 / A995 | Piping components and pump/valve bodies |
Common specification routes.
| Product route | Principal standards | Requirement focus |
|---|---|---|
| Flat products | ASTM A240/A240M; EN 10088-2 | Grade, solution treatment and mechanical properties |
| Bars and pressure bar | ASTM A276/A479 | Condition, section and tests |
| Forgings | ASTM A182/A182M | F51, F53, F55 and related grades |
| Tubular products | ASTM A789/A790/A928 | Tube/pipe route, heat treatment and testing |
| Fittings | ASTM A815/A815M | Class, heat treatment and tests |
| Castings | ASTM A995/A995M | Pressure-containing duplex castings |
Technical data is provided for preliminary sourcing guidance. The applicable customer specification, drawing, purchase order and latest standard revision govern each requirement.
Grade alone is not enough.
Condition, heat treatment, product form, dimensions, surface, corrosion testing, mechanical properties, NDE, traceability and documentation can materially change the supply route.
Bhansali reviews the requirement and coordinates supplier qualification, QA/QC, independent laboratory verification and third-party inspection where required.