ASTM G21 Fungi Resistance Test Specimens
Test specimens used in ASTM G21 (Resistance of Synthetic Polymeric Materials to Fungi). These test specimens can be made from a variety of different materials, including nylon, polyethylene, polyester, and Teflon (PTFE). ASTM G21 describes several standard specimen shapes: a 2" x 2" square, a 2" diameter circle, and a 3" rod or tube. The exact specimen dimensions may vary depending on the material used. This method recommends using three to six specimens per test. ASTM G21 supersedes FED-STD-406 Test Method (FTM) 6091.