Stainless Nitronic® 50 (XM-19)
Nitronic 50 (XM-19) is a high strength and corrosion resistant austenitic stainless steel. It has nearly double the yield strength of 304 and 316 stainless steel and has better corrosion resistance than 317L stainless steel. XM-19 remains non-magnetic even after being severely cold worked. It maintains strength at high temperatures as well as sub-zero temperatures. Nitronic 50 is a very versatile alloy and with Nitronic 50’s outstanding corrosion resistance it is an effective alloy for use in the petroleum, chemical, marine, nuclear, pulp and paper, textile, and food processing industries.
In demanding service environments, Nitronic® 50 is valued for its ability to combine high strength with excellent corrosion resistance, particularly in applications exposed to chlorides, seawater, and aggressive process fluids. This makes it a strong candidate for downhole and offshore applications, where materials must perform reliably under continuous exposure to corrosive media and pressure. Its resistance to pitting, crevice corrosion, and stress corrosion cracking allows it to maintain integrity in conditions where standard austenitic stainless steels may be insufficient.
In addition to corrosion resistance, Nitronic® 50 offers strong wear resistance and mechanical durability, helping reduce material degradation and extend component life in applications involving friction, vibration, or cyclic loading. Its combination of toughness and resistance to galling makes it well-suited for components such as shafts, fasteners, and valve parts that require consistent performance over time. With proper processing and quality control, Nitronic® 50 provides reliable, repeatable performance in critical applications where both strength and corrosion resistance are essential.
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Stainless Nitronic® 50 Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A276*
| arbon | 0.06 | Phosphorus | 0.045 |
| Chromium | 20.5-23.5 | Sulfur | 0.030 |
| Nickel | 11.5-13.5 | Nitrogen | 0.20-0.40 |
| Manganese | 4.0-6.0 | Columbium | 0.10-0.30 |
| Molybdenum | 1.50-3.00 | Vanadium | 0.10-0.30 |
| Silicon | 1.00 |
*Maximum, unless range is indicated
Stainless Nitronic® 50 Physical Properties
| Density, lb/in3 | 0.285 |
| Modulus of Elasticity, psi | 26.2 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 9.0 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 9.0 |
| Specific Heat, Btu/lb ˚F | 0.12 |
| Electrical Resistivity, Microhm-in | 28.7 |
Stainless Nitronic® 50 Mechanical Properties
Mechanical property requirements for annealed product as specified in ASTM A564
| Yield Strength, min. (ksi) | 55 |
| Tensile Strength, min. (ksi) | 100 |
| Elongation, min. (%) | 35 |
Stainless Nitronic® 50 Standards
Typical standards for Nitronic® 50
| ASTM A276 |
| ASTM A479 |
| AMS 5764 |
Your Source for Stainless Nitronic® 50
At Double Eagle Alloys, we supply Stainless Nitronic® 50 in long bar and header plugs engineered for these demanding services. Contact our team to learn how Stainless Nitronic® 50 can support long-term performance and reliability.
Questions? We’d love to help. Contact us today to discuss your needs or to check current availability.
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Data shown are typical and provided for informational purposes only. Values should not be considered minimums or maximums for specification or final design. Actual product data may vary, and information may be revised without notice.