ASTM C491 – Test Method for Modulus of Rupture of Air-Setting Plastic Refractories (Withdrawn 1992) Related Test Methods ASTM D483 ASTM D4829 ASTM D4828 ASTM D4824 ASTM D482 ASTM D4815 ASTM D4814 ASTM D4812 ASTM D4811 ASTM D4810 ASTM D4809 ASTM D4808 Previous Post:ASTM C482 Next Post:ASTM C494