ASTM C203 Flexural Thermal Insulation Testing

Flexural Thermal Insulation is a test standard used to determine the strength of block-type thermal insulation. Breaking load and flexural strength can be determined in this test method by either a three-point or a four-point bend test. There are also different procedure options to account for varying specimen types or a user’s test machine capabilities.


Calculations that can be made from the ASTM C203 Standard test are: 

Breaking Load

Maximum Fiber Stress

Stress at a Specified Strain

Maximum Strain

Flexural Strength (Modulus of Rupture)

Flexural Yield Strength

Elastic Modulus

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