Duplex stainless steel grades and standards
| Type | Example grades | Composition |
|---|---|---|
| Lean | S31500, S32304, S32404 | 0.1-0.22 |
| Standard | S31803, S32205 | 0.1-0.22 |
| Super-duplex | S32520, S32550, S32750 | 0.1-0.35 |
| Hyper-duplex | S32707, S33207 | 0.4 |
What is super duplex stainless steel?
SuperDuplex stainless like Duplex, is a mixed microstructure of austenite and ferrite (50/50) which has improved strength over ferritic and austenitic steel grades. The main difference is that Superduplex has a higher Molybdenum and Chromium content which gives the material greater corrosion resistance.
What is a duplex valve?
Duplex Steel Valves are steel valves that contain both the ferrite phase and the austenite phase in the microstructure. Duplex steels combine characteristics of the austenitic and ferritic family of alloys to offer benefits from both with fewer downsides — often at a lower cost than other steel alloys.
What is Duplex 2205 made of?
General Properties Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades.
Can 2205 duplex stainless steel be hardened by heat treatment?
Heat treatment of Duplex SS 2205 is solution treatment (annealing), between 1020 – 1100°C, followed by rapid cooling. 2205 Duplex Stainless Steel (2205 Duplex) cannot be hardened by heat treatment. They can, however, be work hardened.
What is a dualduplex steel flanged ball valve?
Duplex steel flanged ball valves are nothing but we can say that it is an advanced design to normal ball valves. Duplex Steel Flanged Ball valve is a quarter-turn rotational motion valve that uses a ball-shaped disk to stop or start flow.
What is the difference between 223falc 223 and 2205 duplex stainless steel?
FALC 223 is a trademark of KRUPP STAHL AKTIENGESELLSCHAFT. Duplex 2205 is a typical composition of 22% Chromium and 5% Nickel. 2205 Duplex Stainless Steel is a cheaper alternative to high nickel-based alloys due to low nickel composition.
