Wuxi Xinshanhu Steel Co., Ltd.
Chinese stainless steel manufacturer existing for eleven years
|
Property |
2205 Duplex Steel |
2507 Super Duplex Steel |
Advantage |
|
Yield Strength (MPa) |
450 |
550 |
2507 provides higher strength for demanding applications |
|
Tensile Strength (MPa) |
620 |
750 |
2507 offers superior load-bearing capacity |
|
PREN (Pitting Resistance Equivalent Number) |
32–35 |
40–42 |
2507 performs better in chloride-rich and marine environments |
|
Cost |
Lower |
Higher |
2205 is more economical for standard environments |
|
Weldability |
Good |
Good, requires controlled heat input |
Both weldable; 2507 requires careful welding practices |
|
Service Environment |
Moderate corrosion |
Severe, high temperature, high chloride |
2507 is preferred for harsh conditions |
As shown in the table, 2507 demonstrates clear advantages in strength and corrosion resistance, particularly in seawater, high-temperature, or highly chlorinated environments.
Super duplex 2507 has higher yield and tensile strength compared to 2205, making it ideal for high-pressure, thick-plate, or large structural applications. PREN (Pitting Resistance Equivalent Number) is a critical indicator of resistance to localized corrosion. With a PREN of 40–42, 2507 significantly outperforms 2205 (PREN 32–35), offering superior durability in seawater, chemical, and petrochemical environments.
Both 2205 and 2507 have good weldability, but 2507 requires stricter control of heat input to ensure uniform microstructure and stable performance in the heat-affected zone. For 2507, appropriate preheating and post-weld treatments are recommended. 2205 is easier to weld and is suitable for general industrial applications.
2205 is more cost-effective and suitable for moderate corrosion environments and projects with budget constraints. Although 2507 has a higher initial cost, its superior long-term corrosion resistance and strength reduce maintenance and replacement expenses, making it more economical for demanding applications.
Material Selection Recommendations:
Standard chemical equipment, construction, moderate corrosion environments: 2205 is sufficient
Seawater, petrochemical plants, offshore platforms, high temperature/high chloride conditions: 2507 is recommended
When selecting duplex stainless steel, it is important to balance strength, corrosion resistance, weldability, and cost based on service conditions. 2507 super duplex steel offers clear advantages in severe environments, while 2205 is suitable for general industrial use. Proper material selection ensures maximum performance and minimizes long-term maintenance costs.
For more information about 2507, 2205, or other duplex steels, including pricing and supply details, please contact our sales team. We provide tailored material selection guidance based on your specific service conditions.
sales@xshsteel.com
+8615961815651
