Convert Kilopounds per Square Inch to Kilobars
Convert Kilopounds per Square Inch (ksi) to Kilobars (kbar) instantly and accurately.
Conversion Formula
kbar = ksi × 0.06894757293
About Kilopounds per Square Inch
One ksi (kilopound per square inch) = 1,000 psi ≈ 6.895 MPa - the standard engineering stress unit in the US. ASTM A36 structural steel: 36 ksi yield, 58-80 ksi tensile. ASTM A325 high-strength bolts: 92 ksi proof load. AISC steel construction tables, FAA/MIL-SPEC aerospace allowables, and ASME Section VIII pressure vessel design all use ksi. Fracture toughness (K_IC) for steels: 50-200 ksi·√in. Convenient because it keeps large structural stresses as manageable 3-digit numbers. 1 ksi = 6.895 MPa.
About Kilobars
A kilobar (kbar) = 1,000 bar = 100 MPa = 10⁸ Pa - standard in high-pressure geophysics and experimental petrology. Earth mantle phase transitions: olivine → wadsleyite at ~130-140 kbar (410 km depth); post-spinel transition at ~230 kbar (660 km). Diamond anvil cells routinely reach 100-400 kbar for materials synthesis and equation-of-state measurement. High-pressure synthesis of cubic boron nitride (~50 kbar) and superhard materials uses large-volume presses. Explosive shock pressures for mining and demolition: 100-1,000 kbar. 1 kbar = 100 MPa.
Quick Reference Table
| Kilopounds per Square Inch (ksi) | Kilobars (kbar) |
|---|---|
| 1 ksi | 0.0689476 kbar |
| 2 ksi | 0.137895 kbar |
| 5 ksi | 0.344738 kbar |
| 10 ksi | 0.689476 kbar |
| 25 ksi | 1.72369 kbar |
| 50 ksi | 3.44738 kbar |
| 100 ksi | 6.89476 kbar |