Searching for high-strength Stainless Steel Duplex Flanges that deliver twice the yield strength of 316 stainless steel along with superior resistance to pitting, crevice, and stress corrosion cracking? Salem Stainless Steel Suppliers Pvt. Ltd., Chennai’s trusted stockist and supplier, provides top-quality SS Duplex Flanges for demanding industrial applications.
The “Duplex” name refers to the dual-phase microstructure of the metal. Stainless Steel Duplex Flanges consist of approximately 50% Ferrite and 50% Austenite. This balanced chemistry provides a unique combination of high yield strength and exceptional resistance to chloride stress corrosion cracking (SCC).
Chemical Properties of SS Duplex Flanges:
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Nitrogen (N) | 0.10 – 0.22 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 |
| Iron (Fe) | Balance |
Mechanical Properties of Stainless Steel Duplex Flanges:
| Property | Typical Value |
|---|---|
| Tensile Strength | 620 MPa min |
| Yield Strength (0.2%) | 450 MPa min |
| Elongation | 25% min (in 50 mm) |
| Hardness (Brinell) | ≤ 290 HB max |
Physical Properties of Duplex SS Flanges:
| Property | Value |
|---|---|
| Density | 7.80-7.85 g/cm³ |
| Melting Range | 1420-1470°C |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 16 W/m·K (at 100°C) |
| Thermal Expansion | 13.7 × 10⁻⁶ /K (100°C) |
| Heat Capacity | 418-500 J/kg·K (100°C) |
| Electrical Resistivity | 0.85 μΩ·m (at 20°C) |
Product Specifications:
| Property | Details |
|---|---|
| Product | Stainless Steel Duplex Flanges |
| Shape | Round |
| Surface | Polished |
| Min. Order Quantity | 200 Kgs |
Versatile Applications of Duplex Flanges:
- Oil & Gas: Subsea piping, flowlines, and offshore platform equipment.
- Chemical: Handling organic and inorganic acids.
- Desalination Plants: High-pressure seawater RO systems and brine transport.
- Marine Engineering: Propulsion systems, rudders, and shafting.
- Pulp & Paper: Digesters, bleaching equipment, and stock handling systems.
Trust Salem Stainless Steel Suppliers Pvt. Ltd. for premium Stainless Steel Duplex Flanges with mill test reports, custom machining, and pan-India delivery.
Don’t let corrosion or structural failure compromise your pipeline. Contact our expert sales team today for a competitive quote on SS Duplex Flanges and see how we can help you build for the future.
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