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Haynes Hastelloy® B-3® alloy, 10% cold work
Categories: Metal; Nonferrous Metal; Nickel Alloy; Superalloy
Material Notes: The attributes of Corrosion-Resistant HASTELLOY® alloys include high resistance to uniform attack, outstanding localized corrosion resistance, excellent stress corrosion cracking resistance, and ease of welding and fabrication. Same excellent resistance to hydrochloric acid and other strongly reducing chemicals as B-2 alloy, but with significantly better thermal stability, fabricability and stress corrosion cracking resistance.

In The As-Welded Condition HASTELLOY® B-3® alloy is an additional member of the nickel-molybdenum family of alloys with excellent resistance to hydrochloric acid at all concentrations and temperatures. It also withstands sulfuric, acetic, formic and phosphoric acids, and other nonoxidizing media. B-3 alloy has excellent resistance to pitting corrosion, to stress-corrosion cracking and to knife-line and heat-affected zone attack.

The improved thermal stability of HASTELLOY B-3 alloy minimizes the problems associated with fabrication of B-2 alloy components. This is due to the reduced tendency to precipitate deleterious intermetallic phases in B-3 alloy, thereby, affording it greater ductility than B-2 alloy during and following various thermal cycling conditions. HASTELLOY B-3 alloy has good overall forming and welding characteristics. It may be forged or otherwise hotworked, providing that it is held at 2250°F (1230°C) for a time sufficient to bring the entire piece to temperature. Since it is a low carbon alloy, the use of lower hot finishing temperatures may be necessary to achieve grain size control. B-3 alloy may also be formed by cold working. Although it does work-harden somewhat rapidly, B-3 alloy components can be made using all common cold forming techniques. Limited tests in boiling 20 percent hydrochloric acid indicate that the uniform corrosion resistance of B-3 alloy is not affected by cold reductions up to 50 percent as compared to that of the alloy in the solution heat-treated condition.

B-3 alloy can be welded by all common welding techniques, although oxyacetylene and submerged arc welding processes are not recommended when the fabricated item is to be used in corrosive service. Special precautions should be taken to avoid excessive heat input.

Heat Treatment: All wrought forms of HASTELLOY B-3 alloy are furnished in the solution heat treated condition unless otherwise specified. B-3 alloy is solution heat-treated at 1950°F (1065°C) and rapid quenched, except for bright annealed sheet or coil products which are heat-treated at 2100°F (1150°C) and cooled in hydrogen.

Applications: HASTELLOY B-3 alloy is suitable for use in all applications previously requiring the use of HASTELLOY B-2 alloy. Like B-2 alloy, B-3 is not recommended for use in the presence of ferric or cupric salts as these salts may cause rapid corrosion failure. Ferric or cupric salts may develop when hydrochloric acid comes in contact with iron or copper.

ASME Boiler And Pressure Vessel Code

ASME has published Code Case 2140 for solution annealed HASTELLOY B-3 alloy

Data provided by the manufacturer, Haynes International, Inc.
Key Words: UNS N10675; ASTM B333 (plate, sheet and strip), ASTM B335 (bar), ASTM B366 (welded fittings), ASTM B564 (forgings), ASTM B619 (welded pipe), ASTM B622 (seamless pipe and tube) and ASTM B626 (welded tube)
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Physical PropertiesOriginal ValueComments
Density 9.22 g/ccat RT
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 290Converted from Rockwell C hardness.
Hardness, Knoop 311Converted from Rockwell C hardness.
Hardness, Rockwell C 30
Hardness, Vickers 301Converted from Rockwell C hardness.
Tensile Strength, Ultimate 965 MPa
Tensile Strength, Yield 690 MPa
@Strain 0.2 %
Elongation at Break 40 %in 51 mm
Modulus of Elasticity 216 GPaRT
 147 GPa
@Temperature 1000 °C
 157 GPa
@Temperature 900 °C
 168 GPa
@Temperature 800 °C
 178 GPa
@Temperature 700 °C
 185 GPa
@Temperature 600 °C
 190 GPa
@Temperature 500 °C
 197 GPa
@Temperature 400 °C
 202 GPa
@Temperature 300 °C
 208 GPa
@Temperature 200 °C
 213 GPa
@Temperature 100 °C
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.000137 ohm-cmRT
 0.000130 ohm-cm
@Temperature 1000 °C
 0.000132 ohm-cm
@Temperature 900 °C
 0.000137 ohm-cm
@Temperature 800 °C
 0.000137 ohm-cm
@Temperature 100 °C
 0.000137 ohm-cm
@Temperature 200 °C
 0.000138 ohm-cm
@Temperature 300 °C
 0.000138 ohm-cm
@Temperature 400 °C
 0.000140 ohm-cm
@Temperature 500 °C
 0.000142 ohm-cm
@Temperature 700 °C
 0.000143 ohm-cm
@Temperature 600 °C
 
Thermal PropertiesOriginal ValueComments
CTE, linear 11.4 µm/m-°C
@Temperature 25.0 - 300 °C
 11.6 µm/m-°C
@Temperature 25.0 - 400 °C
 11.8 µm/m-°C
@Temperature 25.0 - 600 °C
 11.8 µm/m-°C
@Temperature 25.0 - 500 °C
 12.2 µm/m-°C
@Temperature 25.0 - 700 °C
 13.1 µm/m-°C
@Temperature 25.0 - 800 °C
 13.9 µm/m-°C
@Temperature 25.0 - 900 °C
 14.4 µm/m-°C
@Temperature 25.0 - 1000 °C
Specific Heat Capacity 0.373 J/g-°CRT
 0.382 J/g-°C
@Temperature 100 °C
 0.409 J/g-°C
@Temperature 200 °C
 0.421 J/g-°C
@Temperature 300 °C
 0.431 J/g-°C
@Temperature 400 °C
 0.434 J/g-°C
@Temperature 600 °C
 0.436 J/g-°C
@Temperature 500 °C
 0.575 J/g-°C
@Temperature 1000 °C
 0.577 J/g-°C
@Temperature 900 °C
 0.589 J/g-°C
@Temperature 800 °C
 0.595 J/g-°C
@Temperature 700 °C
Thermal Conductivity 11.2 W/m-KRT
 12.1 W/m-K
@Temperature 100 °C
 13.4 W/m-K
@Temperature 200 °C
 14.8 W/m-K
@Temperature 300 °C
 16.3 W/m-K
@Temperature 400 °C
 17.9 W/m-K
@Temperature 500 °C
 19.6 W/m-K
@Temperature 600 °C
 21.4 W/m-K
@Temperature 700 °C
 21.4 W/m-K
@Temperature 800 °C
 23.3 W/m-K
@Temperature 900 °C
 27.5 W/m-K
@Temperature 1000 °C
Melting Point 1370 - 1418 °C
Solidus 1370 °C
Liquidus 1418 °C
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al <= 0.50 %
Carbon, C <= 0.010 %
Chromium, Cr 1.5 %
Cobalt, Co <= 3.0 %
Iron, Fe 1.5 %
Manganese, Mn <= 3.0 %
Molybdenum, Mo 28.5 %
Nickel, Ni >= 65 %
Silicon, Si <= 0.10 %
Titanium, Ti <= 0.20 %
Tungsten, W <= 3.0 %
 
Descriptive Properties
Thermal Diffusivity0.003 cm2/sat 25°C
 0.0032 cm2/sat 100°C
 0.0034 cm2/sat 200°C
 0.0037 cm2/sat 300°C
 0.004 cm2/sat 400°C
 0.0044 cm2/sat 500°C
 0.0045 cm2/sat 600°C
 0.0045 cm2/sat 900°C
 0.0047 cm2/sat 800°C
 0.0049 cm2/sat 1000°C
 0.0049 cm2/sat 700°C

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