Duplex Stainless Steel
22% Chromium, 6% Nickel, 3% Molybdenum, duplex austenitic and ferritic structure stainless steel.
Duplex stainless steels have a superior corrosion performance when compared to 316 material. They have a high resistance to pitting and uniform corrosion. The duplex micro-structure contributes to their high strength and high resistance to stress corrosion cracking. They also have good weldability.
Widely available as:
- Plate – 3mm-15mm thick
- Heavy plate – 20mm and above
- Tube, pipe, castings
- hot rolled angle
- hot rolled channel section.
Cold formed angles can be produced from sheared plate and cold formed by CNC pressbrake.
|3mm||30 x 30 mm||Up to||300 x 300 mm||3000mm long|
|4mm||40 x 40 mm||Up to||300 x 300 mm||3000mm long|
|5mm||50 x 50 mm||Up to||300 x 300 mm||3000mm long|
|6mm||60 x 60 mm||Up to||300 x 300 mm||3000mm long|
|8mm||75 x 75 mm||Up to||300 x 300 mm||3000mm long|
|10mm||90 x 90 mm||Up to||300 x 300 mm||3000mm long|
|12mm||120 x 120 mm||Up to||300 x 300 mm||2500mm long|
|15mm||150 x 150 mm||Up to||300 x 300 mm||1500mm long|
Other combinations of unequal leg lengths are also possible, see Cold Forming
Irregular shaped pieces and curved shapes can be cut by plasma, laser or waterjet. The cutting process selection depends on the thickness of the material and the quality and profile of the finished cut edge. See Plasma Cutting
Holes can be drilled or milled. See Holes & Slots
Slotted holes can be punched or milled. See Holes & Slots
Duplex stainless can be welded with MMA, MIG or TIG welding. For more about welding and projects
There are a range of surface finishes available for stainless steel see polishing
Typical Mechanical Properties
(Note - these are general, indicative, guideline values- not to be used for design – check with appropriate standard)
|0.2% proof stress||N/mm2||460|
See BS EN ISO 10088-2