(Nickel Alloy X) Strip, Coil, Foil, Wire, ASTM B435, AMS 5536,  MIL-I-45208, MSRR7158, GE B50TF25


Aircraft, furnace and chemical process components, honeycombs and gas turbine combustion section components 


Hastelloy® X is a nickel-chromium-iron-molybdenum alloy that possesses an exceptional combination of oxidation resistance, formability and high temperature strength. It has also been found to be exceptionally resistant to stress-corrosion cracking in petrochemical applications. Alloy X exhibits good ductility after prolonged exposure at temperatures of 1200, 1400, 1600 °F for 16,000 hours.  It has excellent formability and welding characteristics. 

Chemistry Typical 

Nickel: Balance 
Iron: 17.00-20.00 
Chromium: 20.50-23.00 
Molybdenum: 8.00-10.00 
Cobalt: 0.50-2.50 
Tungsten: 0.20-1.00  
Carbon: 0.05-0.15 max 
Manganese: 1.00 max 
Silicon: 1.00 max 
Aluminum: 0.50 max 
Phosphorus: 0.04 max 
Sulfur: 0.08 max 
Boron: 0.010 max 
Titanium: 0.15 max 
Copper: 0.03 max 

Physical Properties

Density: 0.297 lbs/in3, 8.22 g/cm3

Mean Coefficient of Thermal Expansion: in/in/° F (mm/m/° C): 
70 - 212 °F (20 - 100 ° C): 7.7 x 10·6 (13.9) 

Thermal Conductivity: BTU-in/h-ft-° F (W/m-° K): 
70 ° F (21 ° C): 63 (9.1) 

Modulus of Elasticity:KSI (MPa)  29.7 x 103 (205 x 103) in tension 

Magnetic Permeability: H = 200 Oersteds:

Annealed: 1.002. 

Melting Point: 2470 ° F (1355 ° C) 


Coil - Strip, Foil, Ribbon  Wire - Profile, Round, Flat, Square 

Mechanical Properties at Room Temperature 

Annealed Typical 

Ultimate Tensile Strength: 95 KSI min (655 MPa min) 
Yield Strength: (0.2% offset): 35 KSI min (240 MPa min) 
Elongation: 35% min 

Properties Tempered

Hastelloy® X can be cold rolled to various tempers. Contact Ulbrich Technical Service for additional information. 

Typical Tempered Properties

Nominal 10% Reduction 
Ultimate Tensile Strength: 130 KSI nom (896 MPA nom) 
Yield Strength: (0.2% offset): 105 KSI nom (724 MPA nom) 
Elongation: 22% nom 
Hardness: Re 22 nom 

Nominal 30% Reduction 
Ultimate Tensile Strength: 170 KSI nom (1172 MPA nom) 
Yield Strength: (0.2% offset): 145 KSI nom (1000 nom) 
Elongation: 7% nom 
Hardness: Re 37 nom 

Nominal 50% Reduction 
Ultimate Tensile Strength: 205 KSI nom (1413 MPA nom) 
Yield Strength: (0.2% offset): 190 KSI nom (1310 MPA nom) 
Elongation: 3% nom 
Hardness: Re 39 nom 

Additional Properties

Corrosion Resistance

Refer to NACE (National Associate of Corrosion Engineers) for recommendations. 


#1 - Hot rolled annealed and descaled. It is available in strip, foil and ribbon. It is used for applications where a smooth decorative finish is not required. 
#2D - Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and those parts that need to retain lubricants in the forming process.  #2B - Smooth finish produced by cold rolling, annealing and descaling. A light cold rolling pass is added after anneal with polished rolls giving it a brighter finish than 2D.  #BA - Bright annealed cold rolled and bright annealed 
#CBA - Course bright annealed cold rolled matte finish and bright anneal 
#2 - Cold Rolled 
#2BA- Smooth finish produced by cold rolling and bright annealing. A light pass using highly polished rolls produces a glossy finish. A 2BA finish may be used for lightly formed applications where a glossy finish is desired in the formed part.  Polished - Various grit finish for specific polish finished requirements. 

* Not all finishes are available for all alloys - Contact Ulbrich Sales for more information.

 Wire Finishes

XC - Extra Clean Bright Annealed or Bright Annealed and Cold Rolled Grease - Ultra bright finish (for decorative applications)  Soap - Soap coating on tempered wire to act as lubricant. 

* Contact Ulbrich Wire for custom wire finishes.

Heat Treatment

Hastelloy® X cannot be hardened heat treating. 


For best results refer to: SSINA's "Welding of Stainless Steels and Other Joining Methods". 

 Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels & Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the 'applications' noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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