Kanakratna steelage is a renowned exporter, manufacturer, stockist, supplier, and stockholder of high-quality Duplex and Super Duplex Alloy Seamless Tubes. These tubes are celebrated for their outstanding corrosion resistance, especially against chloride-induced stress corrosion cracking, and offer superior strength compared to standard austenitic stainless steels. Ideal for demanding applications in the chemical processing, petrochemical, marine, and oil and gas industries, Duplex and Super Duplex alloy tubes provide excellent performance in harsh environments. They maintain their mechanical properties across a wide temperature range, ensuring reliability and durability. Additionally, these tubes offer excellent weldability and ease of fabrication, making them suitable for a variety of critical applications.
Greater Corrosion Resistance Than Standard Duplex GradesSuper Duplex stainless like S32750, is a mixed microstructure of austenite and ferrite (50/50) which has improved strength over ferritic and austenitic steel grades. The main difference is that Super Duplex has a higher molybdenum and chromium content which gives the material greater corrosion resistance than standard duplex grades.
High Strength and Cost Effective Corrosion ResistanceThe balanced duel phase microstructure combines high strength with cost effective corrosion resistance particularly in high chloride environments.Super Duplex has the same benefits as its counterpart – it has lower alloying costs when compared with similar ferritic and austenitic grades with equipment corrosion resistance in chloride containing environments due to the material’s increased tensile and yield strength. In many cases this gives the purchaser the welcomed option of purchasing smaller thicknesses without the need to compromise on quality and performance.
Technical Specifications
| CHEMICAL COMPOSITION (% by weight) | ||
|---|---|---|
| Element | Min | Max |
| C | - | 0.030 |
| Cr | 24 | 26 |
| Cu | 0.50 | 1 |
| Mn | - | 2 |
| Mo | 3 | 5 |
| N | 0.24 | 0.35 |
| Ni | 6 | 8 |
| P | - | 0.35 |
| S | - | 0.015 |
| Si | - | 1 |
| MECHANICAL PROPERTIES | ||
|---|---|---|
| Temper | Annealed | |
| Tensile Rm | 115 | ksi (min) |
| Tensile Rm | 800 | MPa (min) |
| R.p. 0.2% Yield | 80 | ksi (min) |
| R.p. 0.2% Yield | 550 | MPa (min) |
| Elongation (2” or 4D gl) | 15 | % (min) |
| PHYSICAL PROPERTIES (Room Temperature) | ||
|---|---|---|
| Specific Heat (0-100°C) | 500 | J.kg-1.°K-1 |
| Thermal Conductivity | 15 | W.m -1.°K-1 |
| Thermal Expansion | 11 | mm/m/°C |
| Modulus Elasticity | 200 | GPa |
| Electrical Resistivity | 8.12 | Ohm-cm |
| Density | 7.80 | g/cm3 |