Lucas-Milhaupt Silvaloy® B72 Brazing Alloy

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Lucas-Milhaupt Silvaloy® B72 Brazing Alloy (discontinued **)
Categories:	Metal; Nonferrous Metal; Precious Metal; Silver Alloy; Solder/Braze Alloy
Material Notes:	Silvaloy B72 is the eutectic composition of the silver-copper system. It is suitable for use in controlled atmosphere brazing without the use of a paste flux. When molten, it is very fluid and may flow out over the work surfaces during some furnace brazing applications. The wetting action on ferrous metals is limited, minimizing its use on carbon steel. Improved wetting is observed when furnace brazing of stainless steel with silver-copper filler metals. Most applications for this alloys are on copper and nickel base alloys. Typical applications are the joining of ferrous, nonferrous, and dissimilar metals and alloys with close joint clearances. Information provided by Lucas-Milhaupt Warwick, LLC (formerly Wolverine Joining Technologies).
Key Words:	AWS BAg-8
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Physical Properties	Original Value	Comments

Specific Gravity	9.06 g/cc
Density	0.360 lb/in³

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000200 ohm-cm

Thermal Properties	Original Value	Comments
Melting Point	1435 °F
Solidus	1435 °F
Liquidus	1435 °F
Maximum Service Temperature, Air	400 °F	continuous
	600 °F	intermittent

Processing Properties	Original Value	Comments
Processing Temperature	1435 - 1650 °F	Brazing Temperature

Component Elements Properties	Original Value	Comments
Copper, Cu	26.85 - 29 %	As balance
Other, total	<= 0.15 %
Silver, Ag	71 - 73 %

Descriptive Properties
Color	White
Electrical Conductivity (% IACS)	87

**
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NBRW046 / 79822

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