Duplex & Super Duplex Valve Materials
Duplex and super-duplex stainless steels combine austenitic and ferritic phases to deliver roughly twice the strength of standard stainless plus excellent resistance to chloride pitting and stress-corrosion cracking, making them the standard for seawater, brine and sour service.
When do you use duplex & super duplex valve materials?
Duplex and super-duplex stainless steels combine austenitic and ferritic phases to deliver roughly twice the strength of standard stainless plus excellent resistance to chloride pitting and stress-corrosion cracking, making them the standard for seawater, brine and sour service. This family includes 6 grades in our material library, listed below with their service-temperature limits and common designations.
| Grade (ASTM) | Common Name | Form | Min °C | Max °C |
|---|---|---|---|---|
| ASTM A182 F60 | Duplex 2205 Forged (Grade F60) | forged | -46 | +315 |
| ASTM A995 CD4MCu / A890 4A | Duplex SS Cast (CD4MCu) | cast | -40 | +300 |
| ASTM A182 F51 | Forged Duplex 2205 (F51) | forged | -40 | +300 |
| ASTM A182 F53 / UNS S32750 (Super Duplex 2507) | Super Duplex 2507 | both | -50 | +300 |
| ASTM A890 Grade 5A | Super Duplex 2507 (Grade 5A Cast) | cast | -46 | +300 |
| ASTM A182 F53 | Super Duplex 2507 (F53) | forged | -50 | +300 |
Other alloy families
Connected Engineering
Need valves in a duplex & super duplex grade?
Tell us the grade and service — we supply duplex & super duplex valve bodies and trim with EN 10204 3.1 material certification.
Browse all grades in the valve material library.