VALE.P Vale S.A.

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United States

Securities and Exchange Commission

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16

of the

Securities Exchange Act of 1934

For the month of

September 2014

Vale S.A.

Avenida Graça Aranha, No. 26
20030-900 Rio de Janeiro, RJ, Brazil

(Address of principal executive office)

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

(Check One) Form 20-F x Form 40-F o

(Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1))

(Check One) Yes o No x

(Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7))

(Check One) Yes o No x

(Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

(Check One) Yes o No x

(If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b). 82-   .)

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Vale and Cosco sign cooperation agreement on VLOCs

Rio de Janeiro, September 12, 2014 — Vale S. A. (Vale) and the China Ocean Shipping Company (Cosco), the largest dry bulk carrier in China and one of the largest dry bulk shipping operators worldwide, signed today, in Beijing, a framework agreement for strategic cooperation in iron ore shipping. The document was signed by Mr Murilo Ferreira, CEO of Vale, and Mr Ye Weilong, Chairman of Cosco Bulk, and witnessed by Mr Ma Zehua, Chairman of the Board of Cosco Group, and Mr. Li Yunpeng, Director of Board and President of Cosco Group.

This agreement brings together a strategic cooperation between Vale and Cosco. Four existing very large ore carriers of 400,000 tons deadweight owned and currently operated by Vale will be transferred to Cosco and chartered by Vale on a long term basis for 25 years. The transaction value will be released after its closing. In addition, Vale and Cosco shall enter into a similar long term contract of affreightment which will be serviced by ten very large ore carriers of similar deadweight to be built by Cosco for the transportation of the world’s best iron ore from Brazil.

For further information, please contact:

+55-21-3814-4540

Rogerio Nogueira: rogerio.nogueira@vale.com

Andre Figueiredo: andre.figueiredo@vale.com

Carla Albano Miller: carla.albano@vale.com

Andrea Gutman: andrea.gutman@vale.com

Claudia Rodrigues: claudia.rodrigues@vale.com

Marcelo Bonança Correa: marcelo.bonanca@vale.com

Marcelo Lobato: marcelo.lobato@vale.com

Marcio Loures Penna: marcio.penna@vale.com

This press release may include statements that present Vale’s expectations about future events or results. All statements, when based upon expectations about the future and not on historical facts, involve various risks and uncertainties. Vale cannot guarantee that such statements will prove correct. These risks and uncertainties include factors related to the following: (a) the countries where we operate, especially Brazil and Canada; (b) the global economy; (c) the capital markets; (d) the mining and metals prices and their dependence on global industrial production, which is cyclical by nature; and (e) global competition in the markets in which Vale operates. To obtain further information on factors that may lead to results different from those forecast by Vale, please consult the reports Vale files with the U.S. Securities and Exchange Commission (SEC), the Brazilian Comissão de Valores Mobiliários (CVM), the French Autorité des Marchés Financiers (AMF), and The Stock Exchange of Hong Kong Limited, and in particular the factors discussed under “Forward-Looking Statements” and “Risk Factors” in Vale’s annual report on Form 20-F.

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Signatures

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

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