Duplex Alloy 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. It demonstrates good fatigue strength, as well as outstanding resistance to stress-corrosion cracking, crevice, pitting, erosion and general corrosion in severe environments.
Carbon: 0.30 max
Silicon: 1.0 max
Manganese: 2.00 max
Molybdenum: 2.50 - 3.50
Nickel: 4.50 - 6.50
Chromium: 21.00 - 23.00
Phosphorus: 0.03 max
Sulfur: 0.020 max
Nitrogen: 0.08 - 0.20 I
ron: Balance
Density: 0.285 lbs/in3 7 .88 g/cm3
Thermal Conductivity: BTU-ft/hr/ft2/°F (W/m-° K):
At 68 - 212 °F (20 - 100 °C): 11.0 (19.0)
Mean Coefficient of Thermal Expansion: in/in/°F (µm/m•K):
32 - 212 °F: 7.6 x 10·6 (13.7)
Modulus of Elasticity: ksi (MPa):
27.5 x 103 (190 x 103) in tension
Coil - Strip, Foil, Ribbon Wire - Profile, Round, Flat, Square