Shear Pin Material 1

[EvilTwin]

We are currently using a Ø.248 shear pin made from 1215 carbon steel (ASTM A108/UNS G12150), hardness is around 80 HRB. It is shearing anywhere from 60,000-65,000 psi. We are looking for a new pin that will shear sooner. I would like to sample some different materials that will lower this shear strength, so we can best fit this to our part.

Thanks for any help offered,
James

 

[CoryPad]

Spirol low carbon steel pins should be closer to (40 to 50) ksi shear stress.

http://www.spirol.com

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[lewtam]

While not quite down to your scale, I've had the same problem with 1" shear pins. Previous bar stock was cold drawn to finished diameter, we just machined clip grooves each end. Solution was to machine the full pin out of larger diameter hot rolled bar - we had some 2" stock on the shelf. A lot more work per pin, but we only needed 10 pins for the job (including 2 test samples). Took the shear strength from >55ksi to around 30ksi.

LewTam Inc.
Petrophysicist, Leading Hand, Natural Horseman, Prickle Farmer, Crack Shot, Venerable Yogi.

 

[ornerynorsk]

If you use 1008 basic wire, your shear strength will be considerably lower. Don't have the specs handy at the moment.