1. ## Difference in deflection??

Hi people.

Does anyone knows if the deflection for two steel plates of the same material with the same dimensions but at different hardenings will be the same or not?

FX. if a plate is 250mmx1000mmx50mm @ 62 HRC and is loaded in the middle of the plate with a force of 30 metric tonne, will the difference in the deflection then be smaller, than if the plate was hardened to 55 HRC?

2. The elastic deflection under the same conditions will not change. This depends on a property of the material called Young's Modulus abbreviate E in deflection calculations

What will change between non-hard and hardened material is the elastic limit. This will be higher in the case of hardened material. In other words you can apply a greater load to the hardened material, it will deflect further due to the increased load but it will spring back to the original shape. With the non-hard material the same load will deform the material permanently because the lower elastic limit has been exceeded.