Exhibit 99.1

NEWS RELEASE

HAYNES INTERNATIONAL, INC. ANNOUNCES RATIFICATION OF LABOR AGREEMENT

KOKOMO, IN, July 3, 2013 — Haynes International, Inc. (Nasdaq: HAYN) announced today that membership of the United Steelworkers Local 2958 (USW) has ratified a five-year agreement covering approximately 505 employees at the Company’s Kokomo, Indiana plant and Lebanon, Indiana service center.  The new agreement succeeded an existing agreement that ran through June 30, 2013.

“We are very pleased that the local union has ratified this new contract,” said Mark Comerford, President and Chief Executive Officer of the Company.  “We believe that this was a successful negotiation process, with contributions by both sides.  With this agreement in place, we look forward to focusing our energy and efforts on meeting the needs of our customers and working together to build a strong future for our company.”

“The new collective bargaining agreement is the result of great efforts by both parties to make positive strides for customers, employees and shareholders,” said Jean C. Neel, Vice President — Corporate Affairs.  “We are very pleased that our employees have shown their support for the new five-year agreement.”

About Haynes International

Haynes International, Inc. is a leading developer, manufacturer and marketer of technologically advanced, high performance alloys, primarily for use in the aerospace, land-based gas turbine and chemical processing industries.

Cautionary Note Regarding Forward-Looking Statements

This news release may contain statements that constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Those statements may include, but are not limited to, statements regarding the intent, belief or current expectations of the Company or its management with respect to the USW’s ratification of the labor contract; strategic plans; revenues; financial results; global economic and political conditions; and production levels at the Company’s Kokomo, Indiana facility.  Readers are cautioned that any such forward-looking statements are not guarantees of future performance and involve risks and uncertainties. Actual results may differ materially from those in the forward-looking statements as a result of various factors, many of which are beyond the Company’s control.

The Company has based these forward-looking statements on its current expectations and projections about

future events.  Although the Company believes that the assumptions on which the forward-looking statements contained herein are based are reasonable, any of those assumptions could prove to be inaccurate. As a result, the forward-looking statements based upon those assumptions also could be incorrect.  Risks and uncertainties, some of which are discussed in Item 1A. of Part 1 to the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2009, may affect the accuracy of forward-looking statements.

The Company undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.