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.
Duplex UNS S31803/1.4462 is a duplex stainless steel with approximately 50% ferrite and 50% austenite.This grade has good mechanical strength at room temperature, resistant to corrosive attack, including pitting and is resistant to stress corrosion cracking.
The grade is a successful alternative to the normal 300 series austenitic stainless steels, where its higher strength and resistance to stress corrosion cracking is required in critical applications.
Technical Specifications
| CHEMICAL COMPOSITION (% by weight) | ||
|---|---|---|
| Element | Min | Max |
| C | - | 0.030 |
| Mn | - | 2.00 |
| P | - | 0.030 |
| S | - | 0.020 |
| Si | - | 1.00 |
| Ni | 4.5 | 6.5 |
| Cr | 21.0 | 23.0 |
| Mo | 2.5 | 3.5 |
| N | 0.08 | 0.20 |
| Fe | Balance | |
| MECHANICAL PROPERTIES | ||
|---|---|---|
| Temper | Annealed | |
| Tensile Rm | 90 | ksi (min) |
| Tensile Rm | 620 | MPa (min) |
| R.p. 0.2% Yield | 65 | ksi (min) |
| R.p. 0.2% Yield | 450 | MPa (min) |
| Elongation (2” or 4D gl) | 25 | % (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 | 13 | mm/m/°C |
| Modulus Elasticity | 200 | GPa |
| Electrical Resistivity | 8.5 | Ohm-cm |
| Density | 7.8 | g/cm3 |