He owns the most important steel company in the United States, and invents Rearden Metal, an alloy stronger, lighter, cheaper and tougher than steel.
hiː ˈoʊnz ðə mˈoʊst ɪmpˈoːɹtənt stˈiːl kˈʌmpəni ɪnðə juːnˈaɪɾᵻd stˈeɪts, ænd ɪnvˈɛnts ɹˈɪɹdən mˈɛɾəl, ɐn ˈælɔɪ stɹˈɔŋɡɚ, lˈaɪɾɚ, tʃˈiːpɚɹ ænd tˈʌfɚ ðɐn stˈiːl.