Nitronic 50


Nitronic 50 is an austenitic premium stainless steel that provides better corrosion resistance than 300 or 400 series stainless. The combination of strength, superior corrosion resistance, and low magnetic permability makes this alloy a top choice for high-risk applications such as medical implantations. It also remains non-magnetic in cold environments, unlike other austenitic grades. Nitronic 50 is also referred to as XM-19 and UNS S20910.


Nitronic 50 offers the best resistance/strength over all other materials near its price point including Nitronic 60 and other austenitic stainless grades. The annealed condition provides strength up to double that of 316 stainless steel. In the high strength condition, Nitronic 50 can withstand high temperature and sub-zero environments allowing it to be used for critical applications. Premium Alloys stocks Nitronic 50 High Strengh with a 120 KSI minimum yield and up to 140 KSI minimum yield upon request.


Premium Alloys offers Nitronic 50 in two different conditions – annealed and high strength. Nitronic 50 is annealed between 1950 deg F and 2050 deg F. For critical applications that need to withstand high corrosive environments, the higher end of the range should be used. The annealing process helps achieve the alloy’s high corrosion resistant properties. Nitronic 50 is then cold worked if transforming into high strength. The increased mechanical properties make it appropriate for oil & gas completion components, downhole drilling tools, marine applications, boat & pump shafting, and valve stems. Due to its ability to work harden, machining Nitronic 50 requires slower speeds and higher power.

Nitronic 50 is a trademark of AK Steel

Physical Properties:

Tensile Yield Enlongation Reduction
of Area
Annealed 100 55 35 55 35 HRC MAX
High Strength 135 105 20 50 35 HRC MAX

Chemical Properties:

Cr Ni Mo Nb
Mn Si
Bal 20.5-23.5 11.5-13.5 1.5-3.0 0.1-0.3 4.0-6.0 0.2-0.6 0.03 MAX 0.01 MAX 0.04 MAX 0.01-0.03 0.2-0.4

The chemical composition of Nitronic 50 is made up of high Chromium (Cr) and high Nickel (Ni) contents with additions of Nitrogen, Maganese, and Molybdenum to develop its corrosion resistance.


  • Valves
  • Pumps and Boat Shafts
  • Heat Exchangers
  • Nuclear
  • Food Processing
  • Chemical
  • Pulp and Paper
  • Oil and Gas (Housing & Downhole Tools)


  • Great mechanical properties at elevated and sub-zero temperatures
  • Outstanding corrosion resistance and good strength in harsh environments
  • Low magnetic permeability
  • Nitronic 50 registers a 150 on the Brinell scale of hardness and an 80 on the Rockwell scale of hardness
  • Nearly double the yield strength of 316 stainless steel
  • Great sulfide resistance, avoiding stress fractures in A/C units
  • Yields a favorable surface finish