ASTM C416

ASTM C416 – Standard Classification of Silica Refractory Brick

Description:

Significance and Use

3.1 The presence of certain impurities in silica brick tends to lower their refractoriness and service limits. This classification permits those familiar with refractories to predict the refractoriness of silica brick from their alkali and alumina contents.

Scope

1.1 This classification is limited to silica brick meeting the following requirements:

1.1.1 Alumina (Al₂O₃) content of less than 1.50 %.

1.1.2 Titania (TiO₂) content of less than 0.20 %.

1.1.3 Iron oxide (FeO₃) content of less than 2.50 %.

1.1.4 Calcium oxide (CaO) content of less than 4.00 %.

1.1.5 Average modulus of rupture of not less than 500 psi (3.45 MPa).