Wire – Nitronic 50

Wire – Nitronic 50

Nitronic® 50 (XM-19)

UNS S20910


Springs, valves, marine hardware, and boat shafting.


Nitronic® 50 is a nitrogen-strengthened austenitic stainless steel with better corrosion resistance and higher strength than many other austenitic stainless steels. Nitronic® 50 is non-magnetic even when cold-worked or at sub-zero temperatures and provides good resistance to pitting and crevice corrosion in sea water.

Industries Supplied

Marine, Oil & Gas Extraction and Medical.

Nominal Composition

Cr: 20.5 – 23.5
Ni: 11.5 – 13.5
Mn: 4.0 – 6.0
Mo: 1.5 – 3.0
Si: 1.0 max
Fe: balance
V: 0.1 – 0.3
Cb: 0.1 -0.3
C: 0.06 max
P: 0.04 max
S: 0.03 max

Physical Properties

Density: 0.285 lb/in3, (7.88 g/cm3)

Modulus of Elasticity (E):
At 70°F (20°C): 29.0 x 103 ksi (200 GPa)

Modulus of Rigidity (G):
At 70°F (20°C): 10.8 x 103 ksi (74.5 Gpa)

Coefficient of Expansion:
9.6 µin/in.-°F (70°F to 600°F)
17.3 µm/m-°C (20°C to 300°C)

Electrical Resistivity: 32.3 µΩ.in, (82 µΩ.cm)

Thermal Conductivity: 108 Btu-in/ft2hr-°F (At 300°F), 15.6 W/m-k (At 149°C)

Applicable Specifications

Wire & Bar:

AMS 5764, ASTM A276, ASTM A479, ASTM A580, ASTM F1314, NACE MR0185/ISO 15156

Typical Mechanical Properties – Spring Applications

  • Annealed
    • Heat Treatment: 2050°F (1120°C)
    • Tensile Strength: 100 – 145 ksi (690 – 1000 MPa)
    • Suggested Operating Conditions: -300°F to 570°F (-184°C to 300°C)
  • Spring Temper
    • Tensile Strength: 200 – 260 ksi; (1380 – 1790 MPa)
    • Suggested Operating Conditions: -300°F to 570°F (-184°C to 300°C)

Nitronic® is a registered trademark of AK Steel Corporation.

For further information Contact:

Contact Us
Phone: 1 847 695 1900
Elgiloy Specialty Metals – Wire Products
356 N.Cross Street
Sycamore, IL 60178 USA

Limitation of Liability and Disclaimer of Warranty:

  • The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only.  It is not intended for engineering or design.
  • Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, does not recommend or endorse any material for any particular end use or application.
  • The data included in this data sheet are typical values and may vary.
  • Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.

In no event will Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, be liable for any damages whatsoever arising from the use of the information included in the data sheets.