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.
SuperDuplex has the same benefits as its counterpart – it has lower production costs when compared with similar ferritic and austenitic grades and due to the materials increased tensile and yield strength, in many cases this gives the purchaser the welcomed option of purchasing smaller thicknesses without the need to compromise on quality and performance.
Benefits of UNS32750 SuperDuplex Stainless Steel
Benefits of using UNS32750 SuperDuplex stainless steel include:
- Improved corrosion resistance in comparison to Duplex
- Greater tensile and yield strength
- Good ductility and toughness
- Good stress corrosion cracking resistance (SSC)
- Opportunity for purchases to reduce their material costs without compromising on quality
Applications of UNS32750 SuperDuplex Stainless Steel
SuperDuplex is used in the oil and gas industry, on offshore platforms, in heat exchangers, chemical processing equipment pressure vessels and boilers.
About UNS32750 SuperDuplex Stainless Steel
2507 is the most common SuperDuplex alloy which contains 24% chromium and a minimum of 3% molybdenum. Please refer to the chemical composition and mechanic properties tables below.
Chemical Composition of UNS32750 SuperDuplex Stainless Steel
The chemical composition of UNS32750 SuperDuplex Stainless Steel is provided in the table below.
| UNS No |
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
N |
Other |
| S32750 |
2507 |
0.030 |
0.80 |
1.20 |
0.035 |
0.020 |
24.0/26.0 |
3.0/5.0 |
6.00/8.00 |
0.24/0.32 |
Cu:0.50 |
Mechanical Properties of UNS32750 SuperDuplex Stainless Steel
The mechanical properties of UNS32750 SuperDuplex Stainless Steel are provided in the table below.
| UNS No |
Grade |
Proof Stress
0.2% (MPa) |
Tensile Strength
(MPa) |
Elongation
A5(%) |
Hardness Max |
| HB |
HRB |
| S32750 |
2507 |
550 |
795 |
15 |
310 |
32 |
This information has been sourced, reviewed and adapted from materials provided by Masteel UK Ltd.
For more information on this source, please visit Masteel UK Ltd