Duro hardness a scale vs d scale

[eddiewdi]

I have specification with a requirement of 65a to 75a shore hardness. The product I received MTR indicates 65d scale. The supplier laboratory reports indictes 65d scale. I have a NCR generated. The supplier claims the materisl meets the specification. I need some clarification. Thanks

 

[btrueblood]

Shore A and Shore D scales aren't equivalent. Fight back.

 

[TVP]

This appears to be quite simple: as btrueblood already indicated, Shore A and Shore D are not the same. The overlap starts around 80 Shore A ~ 30 Shore D, meaning anything below 80 Shore A can only be measured with Shore A scale, and ends around 90 Shore A ~ 40 Shore D, meaning anything greater than 40 Shore D can not be measured using Shore A. So, 65 Shore D is most certainly not the within the specification range of 65-75 Shore A. Even a cursory examination should show this: 65 Shore D is quite rigid and will not be able to be deformed by hand, while 65-75 Shore A is quite flexible and elastic.

 

[eddiewdi]

Thanks for the response, final results indicate that the defined specification was wrong and the supplier was right. Just have to step in it sometimes.

thank again