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STAINLESS STEEL NITRONIC 50HSDownload

Nitronic 50HS (XM-19), or N-50HS is a high strength and good corrosion resistant austenitic stainless steel. It has more than double the yield strength of 304 and 316 stainless steel and has better corrosion resistance than 317L stainless steel. Nitronic 50HS (XM-19) Stainless remains non-magnetic even after being severely cold worked. It maintains strength at high temperatures as well as sub-zero temperatures. The cold worked (HS) version meets the mechanical properties of ASTM A276 Conditions S.

Common Trade Names
XM-19, N-50HS

Chemical Composition

  Ni Cr Mo Mn Si C N S P Cb V Fe
MIN 11.5 20.5 1.5 4.0 - - 0.2 - - 0.1 0.1 -
MAX 13.5 23.5 3.0 6.0 1.0 0.06 0.4 0.03 0.045 0.3 0.3 Balance

Specifications
AMS 5764
API 6A
ASTM A 262, ASTM A 276 Condition S, ASTM A 370, ASTM A 479, ASTM A 484
ISO 15156-3
NACE MR0175
UNS S20910
W. Nr./EN 1.3964

Inventory
Nitronic®50HS Round Bar 

Features
· High strength austenitic alloy
· Good corrosion resistance

Applications

· Seawater pump shafts
· Heat exchangers
· Pressure vessels
· Marine hardware

Physical Properties
Density: 0.285 lb/inch3 
Melting Range: 2579-2642°F
Electrical Resistivity: 492 ohm circ-mil/ft

Temperature, °F 70 200 300 400 600 800 900 1000 1200 1400
Coefficient of Thermal Expansion, in/in°F x 10-6 - 9.0 - 9.2 9.6 9.9 - 10.2 10.5 10.8
Thermal Conductivity
Btu  • ft/ft2 • hr • °F
108 - 108 - 124 - 141 - 160 -
Modulus of Elasticity,
psi X 106 STA
- 26.2 - - - - - - - -

* 70°F to indicated temperature.

Mechanical Properties
Minimum Specified Properties, ASTM A 276 Bar

Ultimate Tensile Strength, ksi 135
0.2% Yield Strength, ksi 105
Elongation, % 20
Reduction of Area, % 50

Nitronic®is a registered trademark of AK Steel.