S31803 (2205) and S32750 (2507) Plate Manufacturer, Supplier. Contact us to get free quote and sample!
Duplex stainless steels combine the best properties of austenitic and ferritic stainless steels, offering high strength, excellent corrosion resistance, and cost efficiency. Among these, S31803 (2205) and S32750 (2507) are widely used in demanding industries.
S31803 (2205) and S32750 (2507) Plate Manufacturer, Supplier
With 15 years of export excellence, HT PIPE is your reliable stockist and exporter. Our portfolio includes pipes, S31803 plate and S32750 plates, round bars, and a wide array of fittings, flanges, and welding accessories. Contact us today for no-obligation pricing and product details-we're ready to support your projects.
compositional differences between S31803 and S32750
S31803: 22% Cr, 5.5% Ni, 3% Mo, 0.15% N
S32750: 25% Cr, 7% Ni, 3.7% Mo, 0.28% N
Basic Characteristics Comparison of S31803 vs S32750
| Characteristic | S31803 (2205) | S32750 (2507) |
|---|---|---|
| International Classification | Medium-alloy duplex | Super duplex |
| PREN Range | 32-33 | >40 |
| Primary Standards | ASTM A240, ASTM A789 | ASTM A240, ASTM A790 |
| Metallurgical Structure | Austenite + Ferrite (~50/50) | Austenite + Ferrite (~50/50) |
| Operating Temp. Range | -50~300°C | -50~250°C |
Mechanical Properties Comparison between S31803 and 2507 stainless steel plate
| Property | S31803 | S32750 |
|---|---|---|
| Yield Strength (MPa) | ≥450 | ≥550 |
| Tensile Strength (MPa) | ≥620 | ≥800 |
| Elongation (%) | ≥25 | ≥15 |
| Brinell Hardness (HB) | ≤290 | ≤310 |
| Impact Toughness | Excellent | Excellent (slightly lower at cryogenic) |
Performance in Typical Corrosive Environments
Chloride SCC: S31803 significantly outperforms 316L, while S32750 resists even high-temperature (>80°C), high-chloride (>20,000 ppm) environments like raw seawater systems.
Acidic media: In sour service, S32750's H₂S resistance exceeds S32750 by 30-40% in critical stress values, making it preferred for highly sour oil/gas fields.
Inorganic acids: S31803 performs well in moderate acid concentrations/temperatures. S32750 withstands higher concentrations/temperatures, especially in industrial-grade acids with impurity ions.
ss 2205 and 2507 plate Temperature adaptability
S31803 risks 475°C embrittlement above 250°C during prolonged use.
S32750 offers better microstructural stability at high temperatures.
Hot forming of Stainless steel S31803 and S32750 sheet
S31803: Recommended hot working temperature range is 900-1180°C, and the final working temperature should not be lower than 900°C.
S32750: Due to the higher alloy content, the hot working window is narrower (980-1150°C), and the final working temperature should be ≥950°C.
cold forming of Stainless steel S31803 and S32750 strip
S31803: Allows moderate deformation, the minimum bending radius can reach 2 times the plate thickness, suitable for cold roll forming.
S32750: Due to high strength and low ductility, a larger bending radius (≥3 times the plate thickness) is required, and a slow, progressive forming process is recommended.
