Nitronic® 50 (XM-19)

Nitronic® 50 (XM-19)

Nitronic® 50 is a high strength and good 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. N50 Stainless remains non-magnetic even after being severely cold worked. It maintains strength at high temperatures as well as sub-zero temperatures.

Chemistry

 NiCrMoMnSiCNSPCbVFe
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
ASTM A 193, ASTM A 262, ASTM A 276, ASTM A 276 Condition A, ASTM A 276 Condition S, ASTM A 479
EN 1.3964
ISO 15156-3
NACE MR0175
UNS S20910
Werkstoff 1.3964

Inventory

Nitronic® 50 Round Bar

Common Trade Names

N50 Stainless

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 100
0.2% Yield Strength, ksi 55
Elongation, % 35
Reduction of Area, % 55

Typical Tensile Properties

Temperature, °F -320 -100 75 200 400 600 800 1000 1200 1350 1500
Ultimate Tensile Strength, ksi - - 117 107 96 92 89 84 74 66 52
0.2% Yield Strength, ksi - - 60 50 38 35 34 32 31 31 30
Elongation, 2% - - 45 43.5 43.5 42.5 43.5 41 38 37 41
Impact Strength, ft-lbs 50 115 170 - - - - - - - -

Nitronic® is a registered trademark of AK Steel.