General Description
Nitronic 50 is a nitrogen-strengthened austenitic stainless steel, which provides a combination of corrosion resistance and strength not found in any other commercial materials in its price range. This alloy possesses corrosion resistance superior to 316, 316L, 317 and 317L plus approximately twice the yield strength at room temperature.
It has very good mechanical properties at both elevated and sub-zero temperatures. The alloy retains low magnetic permeability even after severe cold working or exposure to sub-zero temperatures and excellent mechanical properties up to 1200°F (649°C).
Nitronic 50 is used in such applications as seawater pumps, gate valves for seawater ballast systems on tankers, high-pressure (microbial) deep-sea sampler and incubation chambers and underwater robotic arms, urea production, ammonium carbamate pumps, pressure vessels, tanks, heat exchangers, piping, fittings, valves and pumps, oil field production and down-hole equipments.
Chemical Composition
| Grade | Ni% | Cr% | Fe% | C% | Mn% | Si% | N% | Mo% | Nb% | V% | P% | S% |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nitronic 50 | 11.5-13.5 | 20.5-23.5 | 52.0-62.0 | Max 0.06 | 4.0-6.0 | Max 1.0 | 0.2-0.4 | 1.5-3.0 | 0.1-0.3 | 0.1-0.3 | Max 0.04 | Max 0.03 |
Designations
UNS S20910
ASTM XM-19
Specifications
Nitronic 50 Bar/Forging: ASTM A193/A194/A276/A479
Nitronic 50 Sheet/Plate: ASTM A240
Physical Properties
Density：7.8 g/cm3
Melting Poin: 1415 °C-1450 °C
Mechanical Properties
Solution Annealed
Tensile: Min 690 MPa
Yield: Min 380 MPa
Elongation: Min 35%