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.
