Altos Hornos de México (AHMSA) steel plant

From Global Energy Monitor
This article is part of the Global Steel Plant Tracker, a project of Global Energy Monitor.


Altos Hornos De Mexico S.A. (AHMSA) steel plant (Siderúrgica Altos Hornos De Mexico S.A. (AHMSA) (Spanish)) (also known as AHMSA steel plant) is a 5600-thousand tonnes per annum (ttpa) steel plant in Coahuila, in Mexico. Altos Hornos De Mexico S.A. (AHMSA) steel plant operates a blast furnace (BF), basic oxygen furnace (BOF), and electric arc furnace (EAF).


The map below shows the exact location of the steel plant in Monclova, in Mexico.

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Altos Hornos de Mexico, S.A.B. de C.V. (AHMSA) is the largest integrated steel plant in Mexico, based in the state of Coahuila, 250 kilometers from the United States border.[1]

AHMSA is a national leader in the production and commercialization of flat steel products including hot rolled coil used for machinery parts, wide plate, cold rolled coil, tinplate and tin-free steel, railroad tanks and bridge constructions, and structural shapes. It also produces non-flat steel products like heavy shapes. The company benefits from a fully integrated supply chain, with its own coal and iron mines supplying raw materials to the steel plant.[2]

AHMSA was founded in 1941 in response to steel shortages caused by World War II. The plant's location was chosen for its proximity to the iron and coal mines of Coahuila and the neighboring state of Durango. Steel production officially began with the inauguration of the plant's first blast furnace and hot-rolling mill in 1944. Additional facilities were steadily added over the next three decades, including a cold-rolling mill in 1946, a coking plant in 1955, and a basic oxygen furnace in 1971.[3]

Another major expansion came in 1976, with the addition of a second steel plant that included Mexico's largest and most modern blast furnace, new coking and pelletizing plants, and continuous casting and cold-rolling facilities.[3]

In 1991, following a period of financial instability and rising debt, AHMSA was sold by the Mexican government to its current owner, Grupo Acerero del Norte (GAN). The plant continued to grow and modernize over the ensuing three decades, with the decommissioning of blast furnace No. 1 in 2002, the addition of two new blast furnaces (No. 5 in 1994 and No. 6 in 2010), and the commissioning of a Steckel rolling mill and a 1.2-million tpa Primetals electric arc furnace in 2013 and 2015, respectively.[3]

In 2018, the most recent year for which the company reported official production figures, liquid steel volume at AHMSA reached 4.52 million tons.[4] However, production suffered a 25% dropoff in the first three quarters of 2019, due in part to tariffs imposed by the United States, according to company executive James Pignatelli.[5] By August 2020 AHMSA was reported to be in danger of bankruptcy, with losses of M$4.2 billion (4.2 billion Mexican pesos) in the first quarter of 2020 alone.[6]

Plant Details

  • Alternative plant names: AHMSA steel plant
  • Other language plant name: Siderúrgica Altos Hornos De Mexico S.A. (AHMSA) (Spanish)
  • Location: Prolongación Juárez S/N Col. La Loma, CP. 25770 Monclova, Coahuila, Mexico
  • GPS Coordinates: 26.876889, -101.416612 (exact)
  • Plant status: operating[7]
  • Start year: 1944[3]
  • Parent company: Altos Hornos de Mexico SAB de CV [100%][8]
  • Parent company PermID:
  • Owner: Altos Hornos de Mexico SAB de CV[7] [9]
  • Owner company PermID: 4295884289
  • Crude steel production capacities (thousand tonnes per annum): 5600.0
    • Basic oxygen furnace / Blast furnace (BOF/BF): 44002021[10]
    • Electric arc furnace (EAF): 1200[11][12]
  • Crude Iron production capacities (thousand tonnes per annum): 10886.22
  • 2020 Production (thousand tonnes per annum):
    • Iron production (BF): 1561[15]
  • Steel product category: semi-finished; finished rolled[1]
  • Steel products: hot rolled sheet; wide sheet; cold rolled sheet; tinplate and chrome sheet; structural profiles; white goods[16]
  • Steel sector end users: building and infrastructure; steel packaging; tools and machinery[7]
  • Workforce size: 7511[8]
  • ISO14001 certification: N/A (expired March 2021)[17]
  • ISO50001 certification: N/A[17]
  • Main production equipment: BF, BOF, EAF[1]
  • Detailed production equipment: 2 coking plants; 2 BF (BF#5 (began in 1994; 2210m3); BF#6 (idled in 2020; began in 2011; 1392m3)); 5 BOF (plant #1 (3 BOF began in 1971), plant #2 (2 BOF began in 1976 and 1994)); 1 EAF (began in 2015)[1][10]
  • Power source: 40 MW onsite gas-fired power plant (generates more than 50% of steel plant's electricity)[3]
  • Iron ore source: MINOSA & CEMESA Mexican iron mining subsidiaries[18]
  • Coal source: MICARE & MIMOSA Mexican coal-mining subsidiaries[18]

Articles and Resources


  1. 1.0 1.1 1.2 1.3 "Nuestra Razón de Ser". AHMSA. Retrieved 2020-09-16.
  2. "Grupo Acerero del Norte, S.A. de C.V." Canacero. Retrieved 2020-09-09.
  3. 3.0 3.1 3.2 3.3 3.4 "Nuestra Historia". AHMSA. Retrieved 2020-09-06.
  4. "Reporte Anual 2018" (PDF). AHMSA. April 10, 2019.
  5. "AHMSA reduce su capacidad de producción casi 25% en 2019; espera la ratificación del T-MEC". El Economista. October 15, 2019.
  6. "AHMSA enfrenta una espiral financiera que la acerca de nuevo a la quiebra". El CEO. August 6, 2020.
  7. 7.0 7.1 7.2 "Altos Hornos de México". AHMSA (in español). Retrieved 2022-03-09.
  8. 8.0 8.1 "Annual Report 2019" (PDF). AHMSA. Retrieved 2022-03-09.
  9. "GRUPO ACERERO DEL NORTE, S.A. DE C.V." Canacero. Retrieved 2022-03-09.
  10. 10.0 10.1 AIST Basic Oxygen Furnace Roundup, Association for Iron & Steel Technology, Jan. 2021.
  11. "Changes in a basic industry". Recycling Today. Retrieved 2022-03-09.
  12. 2021 AIST Electric Arc Furnace Roundup, Association for Iron & Steel Technology, Jan. 2021.
  13. "2018 Annual Report (English)" (PDF). AHMSA. Retrieved 2022-03-09.
  14. 14.0 14.1 14.2 "Steel Process". AHMSA (in español). Retrieved 2022-03-09.
  15. 2021 AIST Blast Furnace Roundup, Association for Iron & Steel Technology, Jan. 2021.
  16. "Nuestros Productos". AHMSA (in español). Retrieved 2022-03-09.
  17. 17.0 17.1 "Certificaciones y Reconocimientos". AHMSA (in español). Retrieved 2022-03-09.
  18. 18.0 18.1 "2018 Annual Report" (PDF). AHMSA. Retrieved 2022-03-09.

Other resources

Wikipedia also has an article on Altos Hornos de México (AHMSA) steel plant. This article may use content from the Wikipedia article under the terms of the GFDL.