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Originally Posted by Series 2 Elite
Not true, beam types are prone to damage just like any other instrument. The beam properties probably won't change too much although a lot of materials age harden. If you are serious you need to have any type of torque wrench calibrated from time to time.
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As long as you don't use a beam type of torque wrench, it's pretty safe. Massive abuse might cause the "zero point" to change, but you can adjust the scale, or take that into account in you use.
The beam properties aren't going to change, and there will be no age hardening that could be measured in your or your children's life time. As long as you don't abuse it, or pull it so hard that you cause the metal to yield (i.e. applying 1,000 foot-pounds on a wrench rated for 100), isn't going to be affected. The bending properties of steel aren't going to change unless you start using it in an oven...