Full Description

1.1This classification covers fired refractory brick and shapes consisting predominantly of zircon (ZrO₂SiO ₂) and containing, by chemical analysis, not less than 60% zirconium oxide (ZrO₂) and not less than 30% silica (SiO ₂).

1.2The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.