I'm looking to determine the difference between the two yield strengths on a Matweb material property table for DuPont Performance Polymers Zytel® 105F BK010 PA66. The top is for "50% RH; ISO 527-1/-2" per the comments and the bottom is "DAM;ISO 527-1/-2". I need to know what 50% RH and DAM mean so I can make an informed decision. Any help would be appreciated.

Image from Matweb Table

  • $\begingroup$ 50% relative humidity is the half the maximum capacity of air to hold water at a particular temperature. Look up psychrometric chart for details. $\endgroup$ – Transistor Feb 18 at 15:53
  • $\begingroup$ DAM is probably an abbreviation for "Dry as moulded". $\endgroup$ – alephzero Feb 18 at 16:00

DAM means "dry as manufactured" or "dry as moulded", i.e. the material is in its moisture-free state immediately after manufacture. The DAM moisture content is typically less than 0.2%.

"50% RH" means the material has absorbed moisture from an environment with 50% relative humidity until it has reached an equilibrium state.

|improve this answer|||||
  • $\begingroup$ Thanks that helps! $\endgroup$ – Brice Edward Furr Feb 18 at 20:58

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.