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
Condition |
Tensile | Yield | Enlongation | Reduction of Area |
Hardness |
| Annealed | 100 | 55 | 35 | 55 | 35 HRC MAX |
| High Strength | 135 | 105 | 20 | 50 | 35 HRC MAX |
Fe |
Cr | Ni | Mo | Nb |
Mn | Si |
C | S |
P | V |
N | |
| 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.