Duplex stainless steel (1.4462 or 4462 stainless steel) is an extremely corrosion-resistant stainless steel grade. These stainless steels with a quality of 4462 exhibit a higher resistance to rust than 304 and 316 quality materials and are chemically both austenitic and ferretic stainless steel.
They are harder than stainless steel stainless steel and they are twice as resistant to austenitic materials. In our country, this stainless steel quality is also referred to as "duplex stainless" (in the English name). 1.4462 Palaz Metal is one of the most frequently used stainless steel materials used in boat stocks and yacht shafts and is preferred for both corrosion resistance and mechanical strength.
Grading Quality Characteristics
General features | Explanation |
Corrosion Resistance: | 1.4462 duplex stainless steel, the most common of the duplex stainless steel grade, has excellent corrosion resistance. Because this stainless steel holds a magnet, the corrosion resistance may be low, but the quality of this stainless steel has excellent corrosion resistance. This quality can be mixed with 316L stainless steel, but in terms of properties duplex material is a material far superior to 316L quality. (Corrosion resistance, mechanical properties) |
Mechanical Properties: | The mechanical properties of 1.4462 quality material are very high with good corrosion resistance. There is a better mechanical strength of 1.4462 quality, from 30% to 70% in 304 and 316L grade stainless steels, which are frequently used in daily life. Duplex material is used both in high strength and high corrosion resistance environments. |
Weldability: | The weldability of 14462 duplex materials is poor, but this does not mean that welding cannot be made, and many welding electrode manufacturers produce electrodes and welding wires in accordance with this quality. |
Chemical Composition
Spec: EN 10088-2:2005
1.4462 Steel
| Chemical Element | % Present |
Carbon (C) | 0.0 - 0.03 |
Chromium (Cr) | 21.00 - 23.00 |
Manganese (Mn) | 0.0 - 2.00 |
Silicon (Si) | 0.0 - 1.00 |
Phosphorous (P) | 0.0 - 0.03 |
Sulphur (S) | 0.0 - 0.02 |
Nickel (Ni) | 4.50 - 6.50 |
Nitrogen (N) | 0.10 - 0.22 |
Molybdenum (Mo) | 2.50 - 3.50 |
Iron (Fe) | Balance |
Properties
| Physical Property | Value |
Density | 7.805 g/cm³ |
Thermal Expansion | 13.7 x10^-6 /K |
Modulus of Elasticity | 200 GPa |
Thermal Conductivity | 19.0 W/m.K |
Electrical Resistivity | 0.085 x10^-6 Ω .m |
Spec: EN 10088-2:2005
Sheet - Up to 8mm thick
| Mechanical Property | Value |
Proof Stress | 500 Min MPa |
Tensile Strength | 700 to 950 MPa |
Elongation A50 mm | 20 Min % |
Spec: EN 10088-2:2005
Plate - over 8mm to 13.5mm Thick
| Mechanical Property | Value |
Proof Stress | 460 Min MPa |
Tensile Strength | 700 to 950 MPa |
Elongation A50 mm | 25 Min % |
Spec: EN 10088-2:2005
Plate - Over 13.5mm to 75mm Thick
| Mechanical Property | Value |
Proof Stress | 460 Min MPa |
Tensile Strength | 640 to 840 MPa |
Elongation A50 mm | 25 Min % |
Alloy Designations
Grade 1.4462/2205 is similar to but may not be a direct equivalent:
UNS S31803
UNS S32205
BS 318S13
Supplied Forms
Fittings & Flanges
Pipe
Plate
Sheet
Tube
Bar
Applications
Duplex stainless steels are typically used in:
~ Chemical processing, transport and storage
~ Oil and gas exploration and offshore rigs
~ Oil and gas refining
~ Marine environments
~ Pollution control equipment
~ Pulp & paper manufacturing
~ Chemical process plant
