King Tester Corporation, founded in 1936 by Andrew King and based in Phoenixville, Pennsylvania, is an ISO 17025-accredited maker and leader in portable metal-hardness testing. It specializes in portable Brinell and Rockwell hardness testers, Brinell microscopes such as the KingScan V, test blocks, and calibration services, serving foundry, heat-treating, rail, automotive, and utility customers. Its King Portable Brinell Tester, certified to ASTM E10, is prized for accuracy within 1% and for field versatility even in extreme conditions. With representatives in India, Mexico, Australia, and Sweden, King Tester supports global clients such as Waupaca Foundry and Scot Forge, offering durable, customizable equipment and repair services. Quality, reliability, and innovation anchor a legacy of excellence in metal-hardness testing.