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|