Super duplex stainless steel is an advanced alloy that features an enhanced composition of chromium, molybdenum, and nitrogen, providing superior strength and exceptional resistance to corrosion and pitting. With a balanced microstructure of austenitic and ferritic phases, super duplex stainless steel is particularly effective in harsh environments, such as those found in oil and gas, chemical processing, and seawater applications. Its high mechanical strength allows for thinner-walled constructions, reducing weight while maintaining durability. Additionally, super duplex alloys exhibit excellent weldability and resistance to stress corrosion cracking, making them a preferred choice for demanding industrial applications.
Super Duplex Steel Grades :
| Zeon Grade | Alloy Name | UNS | EN / DIN / W Nr. | AISI / ASTM |
|---|---|---|---|---|
| Zeon53 | Alloy 2507 | UNS S32750 | 1.441 | F53 |
| Zeon55 | Alloy 2507 | UNS S32760 | 1.4501 | F55 |
| Zeon61 | Alloy 255 | UNS S32550 | 1.4507 | F61 |
Chemical Compositions :
|
% |
2205 |
UR52N+ |
|
C |
0-0.03 |
0.03 max |
|
Mn |
2.0 |
1.5 |
|
Si |
1.0 |
0.8 |
|
P |
0-0.03 |
0.035 |
|
S |
0-0.02 |
0.02 |
|
Cr |
21-23 |
24-26 |
|
Mo |
2.5-3.5 |
3.0-5.0 |
|
Ni |
4.5-6.5 |
5.5-8.0 |
|
N |
0.08-0.2 |
0.2-0.35 |
|
Cu |
– |
0.5-3.0 |
Characteristics of Super Duplex Steel :
| Characteristics of Super Duplex Steel | ||
|---|---|---|
| Physical properties that offer design advantages. | Good resistance to stress corrosion cracking (SCC) in chloride-bearing environments. | High resistance to general corrosion. |
| Very high mechanical strength. | Good resistance to pitting and crevice corrosion. | Good weldability and workability |
| High resistance to corrosion fatigue | Suggested for applications up to 600° F | Opportunity for purchases to reduce their material costs without compromising on quality |
| Greater tensile and yield strength | Good ductility and toughness | High resistance to erosion corrosion. |
