Flexural strength tests measure a material's ability to resist deformation under load. This test is crucial for assessing the performance of materials like concrete, metals, and plastics. During the test, a sample is subjected to bending until it fractures, allowing engineers to determine its strength and flexibility. The results help in selecting appropriate materials for construction and manufacturing. Common standards for flexural strength tests include ASTM D790 for plastics and ASTM C78 for concrete. Understanding these properties ensures that structures and products can withstand the forces they encounter in real-world applications.