UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d)

of the Securities Exchange Act of 1934

June 14, 2016 (June 9, 2016)

Date of report (Date of earliest event reported)

Hexcel Corporation

(Exact Name of Registrant as Specified in Charter)

Two Stamford Plaza

281 Tresser Boulevard

Stamford, Connecticut 06901-3238

(Address of Principal Executive Offices and Zip Code)

(203) 969-0666

(Registrant’s telephone number, including area code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Section 1 — Registrant’s Business and Operations

On June 9, 2016, Hexcel Corporation (“Hexcel”), as borrower, and its wholly-owned Luxembourg subsidiary, Hexcel Holdings Luxembourg S.à.r.l. (“Hexcel Holdings”), as co-borrower, entered into a new credit agreement (the “Credit Agreement”) governing its $700 million revolving credit facility (the “Revolver”), which matures on June 8, 2021. The Credit Agreement was entered into by and among Hexcel and Hexcel Holdings, as borrowers, the lenders party thereto, Citizens Bank, National Association, as administrative agent for the lenders, Citizens Bank, National Association, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC, as joint book managers and joint lead arrangers, Bank of America, N.A. and Wells Fargo Bank, National Association, as syndication agents, and Sumitomo Mitsui Banking Corporation, SunTrust Bank, TD Bank, N.A. and U.S. Bank, National Association, as documentation agents.

Proceeds of borrowings on June 9, 2016 were used to repay all amounts, and terminate all commitments, outstanding under Hexcel’s existing credit agreement and to pay fees and expenses in connection with the refinancing. The terminated credit facility was scheduled to expire on September 23, 2019.

Borrowings under the Revolver will bear interest, at Hexcel’s option, at either (i) a Eurocurrency rate, plus the Applicable Margin, or (ii) the greatest of (a) the base rate of Citizens Bank, National Association, (b) the federal funds rate plus 0.50% and (c) the Eurocurrency rate for a one-month interest period plus 1.00%, in each case plus the Applicable Margin. The “Applicable Margin” initially is 1.25% for LIBOR borrowings and 0.25% for base rate borrowings, and after September 30, 2016, can fluctuate depending on the company’s consolidated leverage ratio, as specified in the Credit Agreement. Revolving loans may be borrowed, repaid and re-borrowed by the borrowers, and are available for working capital and other general corporate purposes. Up to $40 million of the Revolver may be used for letters of credit.

The Revolver is unsecured. Hexcel guarantees the performance of Hexcel Holdings’ obligations under the Credit Agreement, including its payment obligations. Hexcel Holdings may borrow up to $200 million under the Revolver and is not liable for Hexcel’s obligations under the Credit Agreement.

The Credit Agreement contains customary covenants that place restrictions on, among other things, the incurrence of debt, granting of liens and sale of assets. The Credit Agreement also contains financial covenants that require Hexcel to maintain a minimum interest coverage ratio and a maximum consolidated leverage ratio. A violation of any of these covenants could result in an event of default under the Credit Agreement. Upon the occurrence of such an event of default or certain other customary events of default, payment of any outstanding amounts under the Revolver may be accelerated and the lenders’ commitments to extend credit under the Credit Agreement may be terminated. In addition, an event of default under the Credit Agreement could, under certain circumstances, permit the holders of other outstanding debt to accelerate the repayment of such obligations.

The preceding summaries of certain provisions of the Credit Agreement and related agreements do not purport to be complete and are qualified in their entirety by reference to the full text of such agreements, which are filed as exhibits 99.1 and 99.2 hereto and are incorporated herein by reference.

On June 9, 2016, Hexcel issued a news release announcing the consummation of the new credit facility. This news release is filed as Exhibit 99.3 hereto and is incorporated herein by reference.

Reference is made to the information contained under Item 1.01 with respect to the terminated credit facility.

Section 2 — Financial Information

Reference is made to the information contained under Item 1.01 with respect to the Credit Agreement and related agreements.

Section 9 — Financial Statements and Exhibits

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT INDEX