Why have big different between KissSoft & MITcalc???

[Ryan.z]

Helo everyone
have a good day
I design a spline coupling and I conpare between 2 calculation software: KissSoft & MITcalc
I found an abnormal result. This is permissible pressure value of material.

I select same material, same hardness, there's a different as image below. anybody can explain why permissible pressure different so much? please. and how to calculate permissible pressure from tensile strength?

 

[mfgenggear]

Ryan

Try entering custom material with the same tensile and heat treat properties.
then contact each of the software engineers, they will help you with this.