POWER OF ATTORNEY

I, Marvin A. Riley, a director of TimkenSteel Corporation, hereby constitute and
appoint Christopher J. Holding, Frank A. DiPiero, Kristine C. Syrvalin and
Amanda J. Sterling, each of them, my true and lawful attorney or
attorneys-in-fact, with full power of substitution and re-substitution, for me
and in my name, place and stead, to sign on my behalf any Forms 3, 4, 5 or 144
required pursuant to the Securities Act of 1933 or the Securities Exchange Act
of 1934, and to sign any and all amendments to such Forms 3, 4, 5 or 144, and to
file the same with the Securities and Exchange Commission, granting unto said
attorney or attorneys-in-fact, and each of them, full power and authority to do
and perform each and every act and thing whatsoever that any of said attorney or
attorneys-in-fact or  any of them or their substitutes, may deem necessary or
desirable, in his/her or their sole discretion, with any such act or thing being
hereby ratified and approved in all respects without any further act or deed
whatsoever.


Executed this 4th day of August, 2018 by the undersigned.



/s/ Marvin A. Riley
Marvin A. Riley