Altos Hornos de México, S.A.B. de C.V. (AHMSA) is the largest integrated steelworks in the country. Its corporate offices are located in Monclova, Coahuila, in central region of the State of Coahuila, 250 kilometers from the U.S. border.
AHMSA operates a vast industrial chain, from the extraction of iron ore and coal to the manufacturing of various steels. It has two steel plants in the city of Monclova, which cover an area of 3,000 acres.
AHMSA currently operates at a rate of close to 5 million metric tons of liquid steel annually, and has a workforce of 19,000, including its mining subsidiaries.
AHMSA is a national leader in production and marketing of flat products: hot rolled coil, wide plate in coils or sheets, cold rolled coil, tinplate and tin-free steel. Furthermore, it has production lines for structural shapes for the construction industry.

Million metric tons of liquid steel annually


The Mission of Altos Hornos de México and Subsidiaries, is to produce and market products of the highest quality, with the best service, at the lowest costs, satisfying and exceeding the needs and expectations of its clients; involving its main asset, which is its people, with high technology equipment and systems; creating a safe environment, with growth opportunities for all, while benefiting its investors and the community.


To be the leading Mexican Steelmaking Company in quality, service and costs; satisfying and exceeding the expectations and needs of all its customers, ensuring the quality and development of its employees and the community, while preserving the environment.

This mentality ensures growth, continuous improvement and sustainability in the long term.


  • Quality, Service, and Continuous Improvement
  • Safety, Orderliness and Cleanliness
  • El cliente y usuario
  • Care for the Environment and Health
  • Costs and Productivity
  • Energy Efficiency
  • Development of Technology and Innovation
  • Appropriate Use of Information
  • Social Responsibility
  • La integridad