ASTM C491 – Test Method for Modulus of Rupture of Air-Setting Plastic Refractories (Withdrawn 1992) Related Test Methods ASTM D455 ASTM D4546 ASTM D4541 ASTM D454 ASTM D4539 ASTM D4533 ASTM D4530 ASTM D4529 ASTM D4525 ASTM D4517 ASTM D4513 ASTM D4511 Previous Post:ASTM C482 Next Post:ASTM C494