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Duplex
Duplex stainless steel is a type of alloy that combines austenitic and ferritic
phases, offering an optimal balance of strength and corrosion resistance. Known for
its high tensile strength and excellent resistance to pitting and stress corrosion
cracking, duplex stainless steel is widely used in demanding environments such as
oil and gas, chemical processing, and marine applications. Its lower nickel content
compared to austenitic stainless steels makes it a cost-effective choice without
sacrificing performance. The unique microstructure of duplex stainless steel also
allows for enhanced weldability and toughness, making it suitable for various
fabrication processes.
Equivalent Grades :
| Euronorm |
UNS |
BS |
EN |
Grade |
| 1.4462 |
S31803 / S32205 |
318S13 |
– |
2205 |
| 1.4507 |
S32520 / S32550 |
– |
– |
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 |
