Hastelloy X

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Description

Nickel Alloy – Hastelloy X

Hastelloy X / Alloy X is a nickel-based super alloy that possesses excellent resistance to corrosion. Additionally, it delivers strong strength characteristics at elevated temperatures-up to 2200 degrees Fahrenheit. Hastelloy X / Alloy X is well suited for forming and welding.

Chemical Composition of Hastelloy X

Element Percentage
Carbon 0.05 – 0.15
Manganese 1.00 max
Phosphorus 0.040 max
Sulfur 0.030 max
Silicon 1.00 max
Chromium 20.50 – 23.00
Nickel Balance
Molybdenum 8.00 – 10.00
Iron 17.00 – 20.00
Titanium 0.15 max
Aluminum 0.50 max
Cobalt 0.50 – 2.50
Boron 0.01 max
Copper 0.50 max
Tungsten 020 – 1.00 max

Resistance to Corrosion and Oxidation of Hastelloy X

Hastelloy X / Alloy X has good resistance to oxidizing, reducing and neutral atmospheres encountered in furnace and jet engine operations up to 2200°F (1204°C). The alloy develops a protective, tenacious oxide film which does not spall off and, therefore, retains oxidation resistance at high temperatures.

Physical Properties of Hastelloy X

  • Density: 0.297 lb/in3 (8.22 g/cm3)
  • Specific Gravity: 8.22
  • Melting Range: 2300 – 2470°F (1260 – 1355°C)
  • Magnetic Permeability: < 1.002

 

Thermal Conductivity of Hastelloy X

The thermal conductivity at various temperatures for Hastelloy X / Alloy X are given in the following table.

Temperature Range Co-Efficients
°C °F W/m.K Btu.ft/ft2.hr.°F
21 70 9.1 5.23
93 200 11.0 6.33
260 500 14.1 8.17
593 1100 20.8 12.0
704 1300 22.9 13.2
816 1500 25.0 14.5
927 1700 27.2 15.7

Electrical Resistivity of Hastelloy X

 

Temperature Range micro ohm-cm
°C °F
21 70 115.8
200 392 120
400 752 123
500 1112 127
800 1472 128
1000 1832 129

 

Mechanical Properties of Hastelloy X

 

Condition Solution Annealed
Tensile Strength ( Mpa ) 784
0.2% Yield Strength ( Mpa ) 343
Elongation ( % ) 45
Hardness ( HB ) 184

 

Applications of Hastelloy X

  • Gas turbine operations
  • Petrochemical
  • Structural components
  • Industrial furnace