Duplex steel is a type of stainless steel that has a two-phase microstructure consisting of both austenitic and ferritic grains. It offers excellent strength, corrosion resistance, and high durability. There are several grades of duplex steel, each with unique properties that make them suitable for specific applications. Here is a brief description of duplex steel products with grades
Equivalent Grades :
Euronorm |
UNS |
BS |
En |
Grade |
1.4462 |
S31803 |
318S13 |
- |
2205 |
1.4507 |
S32520 |
- |
- |
UR52N+ |
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 |
Mechanical Properties :
Grade |
2205 |
UR52N+ |
Tensile Strength (MPa) |
620 |
770 |
Proof Stress 0.2% (MPa) |
450 |
550 |
Elongation A5 (%) |
25 |
25 |
Super duplex steel is a type of duplex stainless steel that has higher corrosion resistance and mechanical strength than standard duplex steel. It contains a higher percentage of chromium, nickel, and molybdenum, as well as other alloying elements like nitrogen, copper, and tungsten. There are several grades of super duplex steel, each with unique properties that make them suitable for specific applications. Here is a brief description of super duplex steel products with grades
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 |
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. |