Hastelloy® B-3 (Alloy B-3) Wire UNS N10675

Alloy B-3 has excellent resistance to pitting corrosion and stress-corrosion cracking, plus thermal stability superior to that of alloy B-2.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Bare Wire ASTM B333, ASTM B335

Hastelloy® B-3 Alloy Description

Alloy B-3 has 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 alloy B-3 alloy minimizes the problems associated with fabrication of alloy 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. Because this alloy contains no significant chromium addition it should NOT be used in oxidizing media or in presence of oxidizing salts, such as ferric or cupric salts. The latter may form when iron or copper is present in a system containing hydrochloric acid. Likewise alloy B-3 does not withstand wet chlorine gas or hypochlorite bleach.


Furnace and chemical process components
Components used in the production of herbicides, insecticides, ethylene glycol, ethyl benzene

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/lb/°F (J/kg•K):32-212°F (0-100°C): 0.089 (373)

Mean Coefficient of Thermal Expansion: in/in/°F (mm/m/°C):
70-212°F (20-100°C): 5.7 x 10 (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 Range: 2500-2585°F (1370-1418°C)

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%

Properties Tempered

Alloy B-3 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Additional Properties

Corrosion Resistance

Refer to NACE (National Association for Corrosion Engineers) for recommendations

Standard Wire Finishes

Extra Clean: (XC) Extra clean is also referred to as “bright annealed” or “bright annealed and cold rolled”

Grease (round wire only): Drawn in a heavy grease produces an “Ultra bright” finish for decorative applications

Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation. A soap finish is available in tempered products.

Plated: Many plating options are available.
∗Special finishes are available: Contact Ulbrich Wire Sales with special finish and plating requests.


Continuous Coils
Cut to lengths
Precision cutting
Heat Treatment
Alloy B3 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 registered trademark of Haynes Alloys

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and 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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