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Super Duplex Stainless Steel
Description
Super duplex stainless steel offers outstanding strength and corrosion resistance, thanks to its elevated levels of chromium, molybdenum, and nitrogen. With a perfectly balanced austenite-ferrite structure, it delivers exceptional performance in aggressive environments. Ideal for hydraulic systems, instrumentation, and seawater applications, super duplex stainless steel combines long-term durability with excellent weldability, making it a preferred material in oil and gas, marine, and chemical industries.
Application：
- Chemical processing
- Petrochemical industry
- Seawater equipment
- Offshore oil and gas
- Heat exchangers
- Hydraulic and instrumentation applications
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Product Specification
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 700 – 1000 MPa (102 – 145 ksi) |
| Yield Strength (0.2% Proof) | ≥ 550 MPa (80 ksi) |
| Elongation | ≥ 15% |
| Hardness (Brinell) | 270 – 350 HB |
| Hardness (Rockwell C) | ≥ 32 RC |
| Elastic Modulus | 200 GPa (29 × 10^6 psi) |
| Impact Resistance | Good at sub-zero temperatures down to -50°C |
Chemistry Composition
| Element | Percentage |
|---|---|
| Chromium (Cr) | 24.0 – 26.0% |
| Nickel (Ni) | 6.0 – 8.0% |
| Molybdenum (Mo) | 3.0 – 5.0% |
| Nitrogen (N) | 0.24 – 0.35% |
| Carbon (C) | ≤ 0.030% |
| Manganese (Mn) | ≤ 1.20 – 1.50% |
| Silicon (Si) | ≤ 0.80% |
| Phosphorus (P) | ≤ 0.035% |
| Sulfur (S) | ≤ 0.020% |
| Copper (Cu) | ≤ 1.00% (optional) |
Related Products
Wall Thickness: 1mm-150 mm
Outer Diameter:6mm-2500mm
Surface: Polishing, annealing, pickling, bright
