1. Scope. 1.1 This test method covers determination of the flexural strength of advanced ceramics at elevated temperatures. Four-point- 1 / 4 point and three-point loadings with prescribed spans are the standard as shown in Fig.1.. Scope. 1.1 This test method covers determination of the flexural strength of advanced ceramics at elevated temperatures. Four-point- 1 / 4 point and three-point loadings with prescribed spans are the standard as shown in Fig.