Thousand pounds per square inch — a stress unit still common in North American engineering.
ksi is 1,000 psi, not a different unit. Steel yield strengths in ksi are common because the numbers are manageable — 36 ksi rather than 36,000 psi.
Convert to MPa by multiplying by 6.894757. The reverse, MPa to ksi, is 0.1450377.
Confusing ksi with kip per square inch or with kg/cm². All three are pressure units with different magnitudes.
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