Steel Testing Laboratory, also known as STL, performs mechanical and chemical testing to meet specific steel application needs. Operational since 1996, it serves steel companies, distribution centers and tier suppliers. The laboratory s technicians perform precise technical calibrations for a verity of testing equipment. Steel Testing Laboratory additionally offers online services scheduling options. The laboratory serves clients in more than 10 U.S. states. The company is accredited by the American Association for Laboratory Accreditation and certified by the Michigan Minority Business Development Council.