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Hastelloy˘ X
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Hastelloy˘ X

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Hastelloy X is a Nickel-Chromium-Iron-Molybdenum alloy with an exceptional combination of oxidation resistance, ease of fabrication and high temperature strength. It has also been found to be exceptionally resistant to stress corrosion cracking in petrochemical applications.

Chemical Composition Specifications Designations Key Features Typical Applications
Element Min % Max %
Cr 20.50 23.00
Mo 8.00 10.00
Fe 17.00 20.00
W 0.20 1.00
C 0.05 0.15
Si 1.00
Co 0.50 2.50
Mn 1.00
P 0.04
S 0.03
B 0.01
Ni bal
AMS 5754
AMS 5798
ASTM B619
GE B50A463
GE B50A655
ISO 15156-3 (NACE MR 0175)
W.NR 2.4665
UNS N06002
AWS 057
Exceptional oxidation resistance.
Highly resistant to stress corrosion cracking in petrochemical applications.
Gas turbine engines
Industrial furnaces
Chemical processing
Petrochemical industry
Density 8.22 g/cm³ 0.297 lb/in³
Melting Point 1355°C 2470°F
Coefficient of Expansion 13.9 μm/m °C (20 – 100°C) 7.7 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity 77.6 kN/mm² 11255 ksi
Modulus of Elasticity 205 kN/mm² 29733 ksi
Heat Treatment of Finished Parts
Condition as supplied by Alloy Wire Type Temperature Time (Hr) Cooling
°C °F
Annealed or Spring Temper Stress Relieve 400 – 450 750 – 840 2 Air
Properties
Condition Approx. tensile strength Approx. operating temperature
N/mm² ksi °C °F
Annealed 850 – 1050 123 – 152 -200 to +400 -330 to +750
Spring Temper 1350 – 1550 196 – 225 -200 to +400 -330 to +750

The above tensile strength ranges are typical. If you require different please ask.

*Trade name of Haynes International

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