Hastelloy® B-3 UNS N010675

Hastelloy® B-3 is a nickel- molybdenum alloy with excellent resistance to pitting, corrosion and stress-corrosion cracking, plus thermal stability superior to that of alloy B-2.

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(Nickel B-3) Strip, Foil, Wire, ASTM B333


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


Hastelloy® B-3 is a nickel- molybdenum alloy with excellent resistance to pitting, corrosion and stress-corrosion cracking, plus thermal stability superior to that of alloy B-2. This alloy has also great resistance to knife-line and heat-affected zone attack. The improved thermal stability of B-3 alloy minimizes the problems associated with fabrication of B-2 alloy components. This is due to the reduced tendency to precipitate deleterious inter-metallic phases in B-3 alloy, thereby, affording it greater ductility than B-2 alloy during and following various thermal cycling conditions.

Chemistry Typical

Nickel: 65.0 min
Chromium: 1.00-3.00
Molybdenum: 27 .00-32.00
Iron: 1.0-3.0
Cobalt: 3.0 max
Tungsten: 3.0 max
Manganese: 3.0 max
Aluminum: 0.50 max
Titanium: 0.20 max
Silicon: 0.10 max
Carbon: 0.01 max
Copper: 0.20 max

Physical Properties

Density: 0.333 lbs/in3, 9.22 g/cm3

Electrical Resistivity: microhm-in, (microhm-cm):
70 ° F (21 °C)- 53.8 (137)

Specific Heat: BTU/lbl° F (J/kg•K):
32 - 212 ° F (0 - 100 °C}: 0.089 (373)

Mean Coefficient of Thermal Expansion: in/inl° F (mm/ml°C):
70 - 212 °F (20 - 100 °C): 5.7 x 10·6 (10.6)

Thermal Conductivity: BTU-in/h-ft-° F (W/m-° K):
70 ° F (21 °C): 78 (11.2)

Modulus of Elasticity: ksi (MPa)
31.4 x 103 (216 x 103) in tension

Melting Point: 2500 - 2585 °F (1370 - 1418 °C)


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

Mechanical Properties at Room Temperature

Annealed: Typical

Ultimate Tensile Strength: 125 KSI (860 MPa)
Yield Strength: (0.2% offset) 60 KSI (420 MPa)
Elongation: 50%


Hastelloy® B-3 can be cold rolled to various tempers. Contact Ulbrich Technical Service for additional information.

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 in 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® B-3 cannot be hardened heat treating.


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


Hastelloy® B-3 is a grade of Hastelloy® which is a nickel-molybdenum alloy. There are many different grades of Hastelloy®, which includes B-3. Grades of Hastelloy® have each been optimized for a specific purpose. Molybdenum makes Hastelloy® harder and stronger at high temperatures. This alloying element and the characteristics it imbues into the material also makes it great for welding applications. These nickel alloys are easily fabricated and formed. They also exhibit good ductility and are able to be cold worked.

All grades of Hastelloy® are considered to be a corrosion resistant alloy because each grade exhibits superior resistance to various corrosive environments. Hastelloy® has outstanding resistance to highly oxidizing corrosives such as oxidizing salts and reducing agents, making it a great alloy to specify for applications used in moderate to severe corrosive environments.

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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