Lucas-Milhaupt PREMABRAZE® 408 Gold-Copper Braze Alloy

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Lucas-Milhaupt PREMABRAZE® 408 Gold-Copper Braze Alloy
Categories:	Metal; Nonferrous Metal; Precious Metal; Gold Alloy; Solder/Braze Alloy
Material Notes:	Premabraze 408 can be used on any of the common ferrous and non-ferrous base alloys. Due to its low and narrow plastic range, this alloy is a preferred choice in step brazing operations. Premabraze 408 exhibits excellent vacuum properties along with high corrosion and oxidation resistance properties. Premabraze 408 is a modified gold-copper alloy. It is generally used in reducing, vacuum, or inert atmosphere. It is a more ductile alloy than standard gold-copper alloys. The composition of the alloy allows for use in applications where braze filler metals low in volatile constituents are required. Available forms: Wire, strip, engineered preforms, specialty preforms, powder and paste. Information provided by Lucas-Milhaupt.
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Physical Properties	Original Value	Comments

Specific Gravity	13.79 g/cc
Density	0.499 lb/in³

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000131 ohm-cm	13.2% IACS

Thermal Properties	Original Value	Comments
Melting Point	1535 - 1553 °F
Solidus	1535 °F
Liquidus	1553 °F

Processing Properties	Original Value	Comments
Processing Temperature	1553 - 1653 °F	Brazing Range

Component Elements Properties	Original Value	Comments
Cadmium, Cd	<= 0.0010 %
Carbon, C	<= 0.0050 %
Copper, Cu	18.97 - 20.97 %	Remainder
Gold, Au	59.5 - 60.5 %
Lead, Pb	<= 0.0020 %
Other, each	<= 0.0010 %	High vapor pressure elements.
Other, total	<= 0.010 %	high vapor pressure elements (Including zinc, cadmium, and lead)
	<= 0.010 %	Impurity elements
Phosphorus, P	<= 0.0020 %
Silver, Ag	19.5 - 20.5 %
Zinc, Zn	<= 0.0010 %

Descriptive Properties
Color	Gold Red

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NLUCM9832 / 254777

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