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Super Duplex Steel S32750, also known as UNS S32750, is a high-performance duplex stainless steel that combines exceptional corrosion resistance with superior mechanical strength. It is widely used in industries where aggressive environments, such as chemical, petrochemical, and marine applications, demand long-lasting and reliable materials.
S32750 Sheet and Plate are manufactured to meet stringent international standards, ensuring durability, uniformity, and consistent quality. These sheets and plates are available in various thicknesses and dimensions, making them suitable for a wide range of applications from industrial equipment to structural components.
The remarkable corrosion resistance of Super Duplex Steel S32750 comes from its high chromium, molybdenum, and nitrogen content. This composition allows it to withstand chloride-induced pitting, crevice corrosion, and stress corrosion cracking, making it ideal for harsh chemical environments.
Mechanical properties of S32750 Sheet and Plate are another key advantage. With high yield and tensile strength, this steel can endure extreme pressures and temperatures, making it suitable for pressure vessels, heat exchangers, and offshore platforms.
S32750 Duplex Stainless Steel is known for its versatility. It can be fabricated into sheets, plates, pipes, and tubes, while still maintaining its excellent weldability and formability. This makes it a preferred material for complex industrial applications requiring precise engineering.
In addition to corrosion resistance, S32750 offers excellent fatigue strength, toughness, and impact resistance. These properties ensure that components made from this steel can perform reliably even under cyclic loading and fluctuating environmental conditions.
Super Duplex Steel S32750 Sheet and Plate are widely used in the oil and gas sector, chemical processing plants, seawater handling systems, desalination plants, and pulp and paper industries. Its ability to resist harsh environments reduces maintenance costs and extends service life.
The material is available in various finishes, including mill finish, polished, and brushed, allowing customization based on aesthetic and functional requirements. Precision cutting, edge preparation, and heat treatment options further enhance its usability.
Specification Table
| Specification | Details |
|---|---|
| Material Name | Super Duplex Stainless Steel S32750 |
| Other Name / UNS | UNS S32750, Duplex 2507 |
| Type | Duplex Stainless Steel |
| Form | Sheet, Plate |
| Standard | AISI, ASTM A240, EN 10088 |
| Thickness | 1mm – 200mm (custom sizes available) |
| Width | 1000mm – 3000mm |
| Length | 2000mm – 12000mm (or as per requirement) |
| Surface Finish | 2B, BA, No. 1, No. 4, Polished |
| Density | 7.8 g/cm³ |
| Applications | Chemical Processing, Oil & Gas, Marine, Desalination, Pulp & Paper |
| Corrosion Resistance | Excellent resistance to pitting, crevice, and stress corrosion |
| Mechanical Strength | High tensile strength and yield strength |
Chemical Composition (Typical ranges for SSSteel)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 0.8 |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.02 |
| Chromium (Cr) | 24 – 26 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Iron (Fe) | Balance |
Mechanical Properties (Typical)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (UTS) | 850 – 1000 | MPa |
| Yield Strength (0.2% Proof) | 550 – 750 | MPa |
| Elongation (A50) | 25 – 30 | % |
| Hardness (Brinell) | 280 – 350 | HB |
| Impact Toughness (Charpy V-Notch) | ≥ 100 | J at -50°C |
| Modulus of Elasticity | 200 | GPa |
| Poisson's Ratio | 0.3 | |
| Density | 7.8 | g/cm³ |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | S32750 |
| AISI / ASTM | ASTM A240 S32750 |
| EN / DIN | 1.4410, X2CrNiMoN25-7-4 |
| BS | BD S32750 |
| JIS | SUS32750 |
| ISO | X2CrNiMoN25-7-4 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Thickness (mm) | Width (mm) | Length (mm) | Approx. Weight (kg/m²) |
|---|---|---|---|
| 1 | 1000 | 2000 | 7.8 |
| 2 | 1000 | 2000 | 15.6 |
| 3 | 1250 | 2500 | 29.3 |
| 5 | 1500 | 3000 | 58.5 |
| 6 | 1500 | 3000 | 70.2 |
| 8 | 2000 | 6000 | 124.8 |
| 10 | 2000 | 6000 | 156.0 |
| 12 | 2000 | 6000 | 187.2 |
| 16 | 2500 | 8000 | 312.0 |
| 20 | 2500 | 8000 | 390.0 |
Common Types Of Steels
Shim Steel
Perforated Steel
Chequered S32750
Coil
Strips
Foil
Hot Rolled Steels
Cold Rolled S32750
Matt PVC Steel
Frequently Asked Questions (FAQ)
What is Super Duplex Stainless Steel S32750?
S32750 is a super duplex stainless steel (UNS S32750 / often compared to 2507) with elevated chromium, molybdenum and nitrogen that provides very high strength and excellent resistance to pitting, crevice corrosion and chloride stress corrosion cracking.
What is the typical chemical composition of S32750?
Typical (approx): C ≤0.03%, Cr 24–26%, Ni 6–8%, Mo 3–4%, N 0.24–0.32%, Cu ≤0.5%, Fe balance. Supplier certificates give exact batch values.
What are the mechanical properties of S32750 sheet/plate?
Typical room-temperature values: yield strength ~450–550 MPa, tensile strength ~800–1000 MPa, elongation ~15–25% depending on thickness and processing. Always use the actual MTC values for design.
Where is S32750 commonly used?
Used in chemical processing, desalination, oil & gas (topsides & subsea), heat exchangers, pressure vessels, valves and piping where high chloride resistance and strength are required.
How does S32750 compare to Duplex 2205?
S32750 (super duplex) has higher Cr, Mo and N than 2205, giving improved pitting/crevice resistance and higher strength. 2205 is commonly used where moderate duplex performance is adequate; S32750 suits more aggressive chloride environments or higher strength needs.
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