In 1947, Roofing and Sheet Metal Supply Company changed its name to Ahrens Materials.  At this point, Frank was semi-retired and his sons, Charles R. Ahrens and Frank F. Ahrens Jr. took over control of the company.  Ahrens Materials functioned in basically the same manner as the old supply company, however it broadened the range and variety of materials.  Service Iron Works was still prospering at this time, and Ahrens Materials remained in existence until 1969.