Nitronic 50

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%

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