Hastelloy® B-2 UNS N10665

Hastelloy® 8-2 is a nickel-base wrought alloy with excellent resistance to hydrochloric acid at all concentrations and temperatures.

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Strip, Coil, Foil and Wire, ASTM B333


Hastelloy® B-2 is used for most chemical process applications in the welded condition, gasoline refining.


Hastelloy® 8-2 is a nickel-base wrought alloy with excellent resistance to hydrochloric acid at all concentrations and temperatures. Therefore, it has great resistance to stress-corrosion cracking and pitting. It also withstands hydrogen chloride, sulfuric, acetic and phosphoric acids.

Chemistry Typical

Nickel: Balance
Molybdenum: 26.00-30.00
Iron: 2.00 max
Chromium: 1.00 max
Cobalt: 1.00 max
Manganese: 1.00 max
Silicon: 0.10 max
Phosphorus: 0.040 max
Sulfur: 0.030 max
Carbon: 0.02 max

Physical Properties

Density: 0.333 lb/in3, 9.22 g/cm3 Electrical Resistivity: ohm-cm
At 212 °F (100 °C): 0.000138 Specific Heat: BTU/lb-°F (J/g-°C)
At 212 °F (100 °C): 0.0930 (0.389)

Thermal Conductivity: BTU-in/hr-ft2-°F (W/m•K)
At 32 °F (0 °C): 77.0 (11.1)
At 212 °F (100 °C): 84.7 (12.2)
At 392 °F (200 °C): 93.0 ( 13.4)
At 572 °F (300 °C): 101.0 (14.6)
At 752 °F (400 °C): 111.0 (16.0)
At 932 °F (500 °C): 120.0 (17.3)
At 1110 °F (600 °C): 130.0 (18.7)

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C)
68-199 °F (20-93 °C): 5.72 (10.3)
68 -399 °F (20 -204 °C): 6.00 (10.8)
68-601 °F (20-316 °C): 6.22 (11.2)
68 -801 °F (20 -427 °C): 6.39 (11.5)
68-1000 °F (20-538 °C): 6.50 (11.7)

Modulus of Elasticity: KSI (MPa)
31.5 x 103 (217 x 103) in tension

Melting Range: 2426 - 2516 °F (1330 - 1380 °C)


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

Mechanical Properties at Room Temperature

Properties: Annealed Typical

Ultimate Tensile Strength: 110 KSI min (758 MPa min)
Yield Strength: 51 KSI min (352MPa min )
Elongation: 40 % min
Hardness: Rb 100 max

Properties: Tempered

Hastelloy® B-2 can be cold worked 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 for all alloys - Consult Sales for applicable finishes.

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 Wire with special finish requests.

Heat Treatment

Hastelloy® B-2 is non hardenable by heat treatment.


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


Hastelloy® B-2 is a grade of Hastelloy® which is a nickel-molybdenum alloy. There are many different grades of Hastelloy®, which includes B-2. 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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