ASTM C491 – Test Method for Modulus of Rupture of Air-Setting Plastic Refractories (Withdrawn 1992) Related Test Methods ASTM D5208 ASTM D5206 ASTM D5201 ASTM D5200 ASTM D5199 ASTM D5198 ASTM D5194 ASTM D5191 ASTM D5190 ASTM D5188 ASTM D5187 ASTM D5186 Previous Post:ASTM C482 Next Post:ASTM C494