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
| 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
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 | – | – | – | – | – | – | – | – |