Scientific Alloys Corp (SAC) carries over 40 years of experience as a world leading manufacturer of solder spheres and balls. Our spheres are of the highest precision in uniformity, purity and overall dimensional accuracy. SAC is able to manufacture an amazingly high variety of alloys and sizes unmatched in the industry. Whereas most sphere makers are specialists, we "specialize" in everything, accomplished through a synergy built through years of constant improvement and innovation. Our unique time-tested processes and custom-made machines allow the company to remain versatile. Our engineering, manufacturing and quality teams work together seamlessly to stay on the razor's edge of sphere-making innovation. Scientific Alloys Corporation is ISO 9001 certified, which assures that our control never wanes and that all areas of the operation--from purchasing to manufacturing to shipping--continually strive towards improvement no matter how small the detail. SAC manufactures both lead-based and lead free alloys. Our Pb solder spheres, which can be produced as small as .003 DIA, typically at tolerances of +/- .001, are used in a wide variety of cryogenic applications where materials of high thermal inertia are required to create and maintain ultra high vacuum environments. This Pb based packing media is used to manufacture and repair cryopumps, cryocoolers, displacers, and GM cryorefrigerators among others. They are ideal for all different types of cryogenic refrigeration systems, even MRI machines. Our Lead-free alloys are used in applications ranging from preforms as jointing components for special material soldering on electrical circuitry, to automotive fuses. All materials are verified for purity and analyzed for consistency from trusted material providers and all come complete with Certificates of Origin and Certificates of Analysis to verify chemical analysis and purity.