Lucas-Milhaupt PREMABRAZE® 51 Gold-Copper Braze Alloy

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Lucas-Milhaupt PREMABRAZE® 51 Gold-Copper Braze Alloy
Categories:	Metal; Nonferrous Metal; Precious Metal; Gold Alloy; Solder/Braze Alloy
Material Notes:	Premabraze 051 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 051 exhibits excellent vacuum properties along with high corrosion and oxidation resistance properties. Premabraze 051 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	15.16 g/cc
Density	0.548 lb/in³

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

Thermal Properties	Original Value	Comments
Melting Point	1625 - 1643 °F
Solidus	1625 °F
Liquidus	1643 °F

Processing Properties	Original Value	Comments
Processing Temperature	1643 - 1743 °F	Brazing Range

Component Elements Properties	Original Value	Comments
Copper, Cu	19.5 - 20.5 %
Gold, Au	74.5 - 75.5 %
Other, each	<= 0.0020 %	Relatively volatile elements such as Mg, Sb, K, Li, Ti, S, Cs, Rb, Se, Te, Sr and Ca.
Other, total	<= 0.010 %	Volatile Elements: incl. Cd, Zn, Pb.
	<= 0.050 %	Non-Volatile
Silver, Ag	4.5 - 5.5 %

Descriptive Properties
Color	Gold Red

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NLUCM9825 / 254771

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