Protective Metal Alloy's unique powder metallurgy process lends itself to the manufacture of Nickel and Cobalt braze alloys in a variety of forms. Due to the boron content, these braze alloys have low ductility and therefore cannot be formed by conventional metalworking procedures. PMA produces preforms up to 6" diameter with cross sectional areas as small as .020" to AMS specifications 4775, 4776, 4777, 4778 and 4783. For multiple and repetitive furnace brazed assemblies, our nickel and cobalt alloy preforms offer the following benefits and advantages: Our powder metallurgy preforms vary less than 1% in weight, thus each joint will have exactly the proper amount of filler material to produce a consistently optimum brazement. Use of prealloyed powders produces a homogeneous alloy structure throughout the cross-sectional area, thereby ensuring complete melting at proper brazing temperatures. Our powder metallurgy preforms offer considerable cost savings over competitive methods of manufacture. No binders or contaminants are used in our process as in tape, cartridges or braze rope. Preforms offer significant labor and time savings in assembly as compared to powders or pastes. Unlike pastes, cartridges and braze rope, solid powder metallurgy preforms have an indefinite shelf life with proper storage. In a multiple joint assembly such as a heat exchanger proper count of preforms will ensure that all joints have been filled.
Protective Metal Alloys, Inc.
San Diego California
USA
