SilverAlloy A-54N


INTRODUCTION

Aufhauser SilverAlloy A-54N is a silver brazing alloy suitable for furnace brazing due to its low zinc content. Its broader melting range (250°F) is helpful where clearances are not uniform. During melting, SilverAlloy A-54N passes from the solid state to a mushy or plastic state and progressively to a liquid. If heated slowly through this plastic state (1325-1575°F) the liquid portion may flow from the solid portion. This causes a separation of the alloy into a low-temperature melting (fluid) portion and a high-temperature melting (solid) portion. This phenomenon is called liquation. The high temperature melting portion will melt only above the normal brazing temperature of SilverAlloy A-54N. For this reason, SilverAlloy A-54N should be heated rapidly through the melting range.

APPLICATIONS

Typical applications for SilverAlloy A-54N are the joining of ferrous, non-ferrous and dissimilar metals and alloys, except aluminum and magnesium.

GENERAL INFORMATION

Chemical Composition
Silver Copper Zinc Nickel Total Other
54 40 5 1 0.15

ADDITIONAL INFORMATION

During melting, SilverAlloy A-54N passes from the solid state to a mushy or plastic state and progressively to a liquid. If heated slowly through this plastic state (1325-1575 °F) the liquid portion may flow from the solid portion. This causes a separation of the alloy into a low temperature melting (solid) portion. This phenomenon is called liquation. The high temperature melting portion will melt only above the normal brazing temperature of SilverAlloy A-54N. For this reason, SilverAlloy A-54N should be heated rapidly through the melting range.

Generally, the joint strength using SilverAlloy A-54N will surpass the strengths of the base metals. Strength is a function of the base metals being joined, type of joint, design of joint, joint clearances and brazing procedures. The recommended maximum operating temperature for SilverAlloy A-54N is up to 700°F (370°C).

PHYSICAL and MECHANICAL PROPERTIES
Solidus 1325°F (718°C)
Liquidus 1575°F (857°C)
Brazing Range 1575-1775°F
Specific Gravity 9.59
Density 5.054 TO/Cu.In
Electrical Conductivity 49.8 %IACS
Electrical Resistivity 3.46 μohm-cm
Color White
 
SPECIFICATIONS MEET or EXCEED
AWS A5.8 BAg-13
ASME BAg-13
AMS 4772
 
STANDARD SIZES AND DIAMETERS
Diameters: 1/32", 3/64", 1/16", 3/32", 1/8"
Sizes: 1, 3, 5, or 50 troy ounce
 

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