Assertion: carbon black's carbon | /r/CapableOf | exhibit 820,000 psi
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Source sentences:
text: Carbon heated in the range of 1500–2000 °C (carbonization) exhibits the highest tensile strength (5,650 MPa, or 820,000 psi), while carbon fiber heated from 2500 to 3000 °C (graphitizing) exhibits a higher modulus of elasticity (531 GPa, or 77,000,000 psi).