Amount of tensile machine pressure 1

[QAFitz]

When a tensile machine is rated at 60,000 lbs or 120,000 lbs, is this the maximum amount of force in lbs the machine can exert ?
We've got a cold one riding on the answer (after work of course). I'm saying yes while my buddy says its based upon the diameter of the sample (i.e., a .505 tensile specimen or a 1/4" bolt).

 

[CoryPad]

The rating is the maximum force that can be exerted, independent of the sample size.

Sample size is important when considering whether a sample will break at 60,000 lbs. For example, a 0.505 diameter tension specimen can have an ultimate tensile strength of 300,000 psi and break before the limit. A plate specimen with 0.5" thickness and 0.5" width can have an ultimate tensile strength of only 240,000 psi and break before the limit.

Regards,

Cory

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

 

[EdStainless]

Yes, it is gross machine load. Many older machines that were set up for both tension and compression would handle double the rating in comp.
We make 1" x 0.200" wall cold drawn tubing. We usually can't break it with our 60k machine (64k max). So we just record the actual yield and 127ksi as UTS (64,000 lb/area).

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Corrosion, every where, all the time.
Manage it or it will manage you.

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