Founded in 1927, Mapes & Sprowl Steel is a leading service center specializing in enameling steel for porcelain-coating applications, silicon electrical steel for electrical applications, Agion antimicrobial treated steel, and electrical steel cores. Our employee owners display unmatched commitment and pride in their work. QUALITY CONTROL Mapes & Sprowl maintains strict Statistical Process Control (SPC) standards. We are ISO 9001:2015 certified and welcomes customer audits. CUTTING EDGE TECHNOLOGY To ensure that we maintain our position as a technology leader for the industry, we maintain membership in the Porcelain Enamel Institute. Through this membership, we are among the first to learn of more efficient enameling procedures, new market opportunities, and we are able to improve our relationships with customers and vendors.