Materfer (an acronym for Material Ferroviario S.A.) is an Argentine manufacturer of railway and road vehicles, located in the city of Ferreyra in Córdoba Province.

Materfer has built several types of rolling stock in its history, such as diesel locomotives, coaches and trams, most of them for the state-owned company Ferrocarriles Argentinos which operated trains within Argentina from 1948 to 1991.

Although the first railcars were manufactured in Italy and France, most of them were made in Argentina, in a factory specially designed for that assignment located in Ferreyra, Córdoba and named "Materfer".

The train featured extensive use of stainless steel, was originally named the Zephyr, and was meant as a promotional tool to advertise passenger rail service in the United States.

In 1962, the 7131, a railcar manufactured by FIAT Concord, made its debut in the Villa Ballester–Zárate and Victoria–Capilla del Señor sections of General Mitre Railway, then managed by Ferrocarriles Argentinos.

[6][7] The lack of maintenance of the FIAT 7131 coaches put some of them out of service, so in 1987 Ferrocarriles Argentinos looked to Materfer to provide light railcars for the Zárate and Capilla del Señor branches.

The company bought 8 units made by Materfer and soon nicknamed them Pitufos (a Spanish translation for "Smurfs") due to their small size.

[4] In the late 1980s and early 1990s the company built its last vehicles under the FIAT Ferroviaria name, an order of trams for Premetro line E2 in the city of Buenos Aires.

[9][10] After the Government of Argentina took over freight railway company Belgrano Cargas, Materfer offered to build the rolling stock to supply the 7,040 km length of the line.

Some 7131 railcars were also refurbished in 2008 and used by Private company Trenes Especiales Argentinos (TEA) to run passenger services from F. Lacroze (Buenos Aires) to Posadas in Misiones Province.

[1] In April 2015 Materfer produced CMM 400-2 railcars for the Tren del Valle that runs between the cities of Neuquén and Cipolletti in Rio Negro Province.

[23] In 2015 CMM 400-2 trainsets were acquired for and incorporated into the diesel segment of the Mitre Line, running services from Victoria to Capilla del Señor in Greater Buenos Aires.