American Fairfield Inc.

Alloys Containing Aluminum

Product variants

Aluminum alloys are widely used in various industries due to their excellent strength-to-weight ratio, corrosion resistance, and high thermal and electrical conductivity. Prince & Izant offers a range of aluminum brazing alloys, including:

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Details & Features

Specifications

Brazing Temperature Range High: 1120 F / 604 C
Brazing Temperature Range Low: 1080 F / 582 C
Liquidus: 1080 F / 582 C
Solidus: 1070 F / 577 C
Al: 86.45%
Si: 12%
Fe: 0.8%
Cu: 0.3%
Zn: 0.2%
Mn: 0.15%
Mg: 0.1%

Brazing Characteristics

AL 718 (or BAlSi-4) is a low melting general purpose aluminum alloy with a narrow freezing range.

AL 718’s silicon content provides for increased fluidity and reduced shrinkage.

AL 718 produces bright and almost smut free welds. Hot cracking is reduced when this alloy is used.

Uses

Used for a variety of applications including brazing electronic vacuum tube assemblies. Common base materials joined include copper, nickel, metalized ceramics, nickel-cobalt-iron, and carbide.

Froms:

Wire, strip, engineered preforms, specialty preforms per customer specification, powder and paste.

Properties of Brazed Joints

The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal. Joint clearances of 0.003-0.005 in. (.076-.127mm) per side are optimum for achieving highest joint strength. Joints with increased clearances can still produce adequate joint strengths depending on final operating conditions.

Al-Si Brazing Alloys: These alloys contain aluminum and silicon as the primary components and are ideal for brazing aluminum to itself or to other metals such as copper.
Al-Cu Brazing Alloys: These alloys contain aluminum and copper as the primary components, and they have good corrosion resistance, making them suitable for use in harsh environments.
Al-Mg Brazing Alloys: These alloys contain aluminum and magnesium as the primary components and are commonly used in the aerospace industry due to their high strength and toughness.
Al-Ge Brazing Alloys: These alloys contain aluminum and germanium as the primary components, and they have a low melting point, making them ideal for brazing electronic components.

Overall, Prince & Izant's aluminum brazing alloys offer excellent performance and durability in a range of applications, from automotive manufacturing to aerospace engineering.