ASTM C473

ASTM C473 - Physical Testing of Gypsum Panel Products​

ASTM C473 is a standard method that covers the physical testing of gypsum panel products in the following order:

  1. Flexural strength (Method A)

  2. Core, end, and edge hardness (Method A)

  3. Nail pull resistance (Method A)

  4. Humidified deflection

  5. End squareness

  6. Nominal thickness

  7. Recessed- or tapered-edge depth

  8. Width

  9. Length

  10. Water resistance of core-treated water repellant gypsum panel products

  11. Surface water resistance of gypsum panel products with water-repellant surface

For use in these test methods, a sample shall consist of gypsum panel products. 

  • To evaluate flexural properties, the specimen is placed near the ends, applying a transverse load midway between the supports.

  • To evaluate the core, end, and edge hardness, a steel punch presses into the test area to measure the required force. 

  • To evaluate nail pull resistance, a standard nail head is pushed through the product to measure the required load.

For more information about this test method, visit the official ASTM website.  

Grips, Machines & Materials suited for the Testing

Grips

  • BE302: 3 point bending with fixed supports
  • PU16: Steel punch
  • PU17: Test nail

Machines

  • ITJ Intelli-Jack with Frame
  • ITJ Intelli-Jack

Materials

  • Gypsum