Carpenter Technology (CRS) S-8 Registration of securities for employees

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement onForm S-8 of Carpenter Technology Corporation of our report dated August 29, 2019 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in Carpenter Technology Corporation’s Annual Report onForm 10-K for the year ended June 30, 2019.

/s/   PricewaterhouseCoopers LLP

Philadelphia, PA

January 30, 2020