Ferralium® 255 – 3SF is a super duplex stainless steel supplied as forgings. As a 25% Cr alloy, with significant additions of Cu, it offers excellent corrosion resistance in a variety of corrosive chemicals including, but not limited to, sulphuric, nitric and phosphoric acid.
In seawater and other chloride contaminated environments it also provides outstanding resistance to pitting and crevice corrosion, with a critical pitting temperature exceeding 50°C.
Excellent ductility and impact strength at both ambient and sub-zero temperatures combine with a high resistance to abrasion, erosion and cavitation erosion.
|0.2% Proof Stress||550 N/mm2||79.8 ksi|
|Tensile Strength||750 N/mm2||108.8 ksi|
|Elongation, 5.65√S0 and 4D||25%|
|Reduction of Area|
|Hardness (Brinell)||220 - 270|
|Impact Strength (Room Temp)||80J||59.0 ft.lb|
|Magnetic Permeability (20°C)||33|
|Young’s Modulus (kN/mm2)||199|
|Specific Electrical Resistance, 20°C (µΩ-m)||0.8|
|Mean coefficient of thermal expansion, 20-100°C (m/m/degC)||11.1 x 10-6|
|Specific Heat, 20°C (J/kg.K)||475|
|Thermal conductivity, 20°C (W/m.K)||14.2|
|Fracture Toughness, KQ (MPa/m2)||98|
Worldwide Delivery Available
We can offer air, sea and road freight shipping options, with choice of packaging, to deliver to customers globally.
Let us manage your total material requirements with call-off and consignment arrangements.
Up to 40 sizes per alloy available
More sizes equal less machining and a more cost-effective supply chain.