Nickel alloy 20 is a low­carbon, niobium­stabilized austenitic nickel/iron/chromium alloy with additions of molybdenum and copper. It exhibits exceptional corrosion resistance in chemical environments containing phosphoric acid, nitric acid, chlorides and sulfuric acid. 

It also has good mechanical properties at both ambient and elevated temperatures.

The following sections will discuss in detail about nickel alloy 20.

Chemical Composition

Element Content
 Iron 35.0
 Nickel 32.0-38.0
 Chromium 19.0-21.0
 Copper 3.0-4.0
 Manganese <2.0
 Molybdenum 2.0 - 3.0
 Niobium <1.0
 Carbon <0.07
 Phosphorus <0.045
 Sulfur <0.035

Physical Properties

  Metric Imperial
Density 8.05 g/cm3 0.291Metric lb/in3

Mechanical Properties

Property Metric Imperial
Tensile strength* 620 MPa 89900psi
Yield Strength* 300 MPa 43500psi
Elongation at break* 41% 41%



The following are the list of applications of nickel 205 alloy:

  • Production of plastics and synthetic fibers
  • Chemical and petroleum processing equipment
  • Mixing tanks
  • Heat exchangers
  • Process piping