Kilopounds per square inch (KSI) is a very useful unit for stress or atmospheric pressure (although it's rare to have atmospheric pressures in the ksi ranges unless you're very deep underwater). An example is, typical steel can take stresses of up to 35 ksi before yielding.
Sources:
https://www.pmel.noaa.gov/eoi/nemo1998/education/pressure.html
https://www.sciencedirect.com/topics/engineering/minimum-yield-strength#:~:text=The%20most%20common%20industry%20standard,80%2C000%20psi%2F550%20MPa).
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