ASTM C491 – Test Method for Modulus of Rupture of Air-Setting Plastic Refractories (Withdrawn 1992) Related Test Methods ASTM D3846 ASTM D3838 ASTM D3835 ASTM D3831 ASTM D3829 ASTM D3828 ASTM D3827 ASTM D3826 ASTM D3825 ASTM D3822 ASTM D3815 ASTM D381 Previous Post:ASTM C482 Next Post:ASTM C494