ASTM D790 Flexural Test – Specimen Size

ASTM D790 Flexural Test – Specimen Size

Flexural properties testing by ASTM D790, a commonly used test in the plastics industry, measures the flexural modulus and flexural strength of reinforced and unreinforced plastic materials. The results obtained indicate the stiffness of the test material, enabling the choice of materials that do not bend when supporting the loads needed for a required application.

    ASTM D790 Flexural Test – Specimen Size

    • Test specimens of the rectangular cross-section are injection molded, cut from molded or extruded sheets or plates, or cut from molded or extruded shapes. Specimens must be solid and uniformly rectangular. The specimen rests on two supports and is loaded utilizing a loading nose midway between the supports.
    • A wide variety of shapes are allowed in this test; however, the general specimen size for ASTM D790 is 3.2 mm × 12.7 mm × 125 mm (approx. 0.125-inch × 0.5 inch × 5.0 inch), and for ISO 178 is 10 mm × 4 mm × 80 mm.
    Image 01:  Three-point bend test

    Common Uses

    As determined by this ASTM D790 test method, flexural properties are especially useful for quality control and specification purposes. They include:

    • Flexural stress
    • Flexural stress for beams tested at large support spans
    • Flexural strength
    • Flexural offset yield strength
    • Flexural stress at break
    • Stress at a given strain
    • Flexural strain
    • Modulus of elasticity

    Industrial Applications

    • Determination of flexure strength and flexural modulus help product designers in choosing the most appropriate plastic or composites for their application.
    • Products designed with low flexural strength materials, like sporting equipment, may not survive long-term use. This is why the ASTM D790 test is carried out in manufacturing industries that manufacture sports equipment, automotive parts, and construction materials.

    Core Materials Testing Services


    A variety of microscopy and spectroscopy tools available for precise measurements from the nano to the meter scale.

    Metrology Testing Services POPULAR TESTS:

    TEM SIMS Profilometry

    Materials Testing

    ASTM and ISO standard and custom chemical, mechanical, thermal, corrosion tests, etc. for all materials metals, ceramic or polymers.

    Materials Testing Services POPULAR TESTS:

    Nondestructive Testing Electrical Testing Chemistry Analysis

    Product Testing

    Thousands of tests for product quality and reliability under heat, humidity, temperature shock, vibration, drop, electrostatic discharge.

    Product Testing Services POPULAR TESTS:

    Vibration Testing Humidity Testing Accelerated Aging

    Looking for Material Testing?

    We have already delivered 10000+ Material Test results to top companies

      Send us a request

        Process for testing
          STEP 01

          You share material and testing requirements with us

          STEP 02

          You ship your sample to us or arrange for us to pick it up.

          STEP 03

          We deliver the test report to your email.

          Let’s work together!

          Share your testing requirements with us and we will be happy to assist you.

          ddd Just share your testing requirements and leave the rest on us!
          • Free, no-obligation consultation
          • Guaranteed confidentiality
          • Quick turnaround time
          • Hassle-free process


            Let us combine our capabilities to achieve success!!

              idea icon
              Want to connect with an expert before you leave?