Alloy 20 / UNS N08020
Austenitic alloy – Alloy 20 is based on nickel, iron, and chromium and has high corrosion resistance in settings including sulfuric acid and other hostile fluids. This alloy is stabilized with niobium to stop intergranular corrosion. When carefully compared to higher nickel-based alloys, Alloy 20 may offer possible cost savings while outperforming regular stainless steels. Alloy 20 Chemical Composition: Element Content (%) Iron, Fe 35 Nickel, Ni 32-38 Chromium, Cr 19-21 Copper, Cu 3-4 Manganese, Mn ≤2 Molybdenum, Mo 2-3 Niobium, Nb ≤1 Silicon, Si ≤1 Carbon, C ≤0.07 Phosphorous, P ≤0.045 Sulfur, S ≤0.035 Alloy 20 Physical Properties: Properties Metric Imperial Density 8.05 g/cm3 0.291 lb/in3 Alloy 20 Mechanical Properties: Properties Metric Imperial Tensile strength (annealed) 620 MPa 89900 psi Yield strength (annealed) 300 MPa 43500 psi Elongation at break (annealed) 41% 41% Nickel Alloy 20 Thermal Properties: Properties Metric Imperial Thermal expansion co-efficient (@20-100°C/68-