Altos Hornos De Mexico SA AHMSA steel plant

Altos Hornos De Mexico SA AHMSA steel plant is a steel plant in Mexico. Its listed capacity is 5,500,000 t of steel. Steel plants burn coal in blast furnaces or use electric arcs to melt scrap; in both cases the molten metal must be kept above 1,500°C and transferred through extensive hot piping and vessels. It is operated by Altos Hornos de Mexico SAB de CV. By capacity it ranks #2 among 10 steel plants in Mexico. It emits about 4,044,261 t CO₂e a year from Climate TRACE. That is 9.9% of the CO₂e from the 62 facilities in Mexico that have an emissions figure in IndustryAtlas. Its CO₂ per unit of capacity is 21% below the national median for this sector.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-32441229.

In context: how this facility compares

At 5,500,000 t of steel, Altos Hornos De Mexico SA AHMSA steel plant is well above the median steel plant in Mexico (1,650,000 t of steel). Subsector: iron-and-steel. As steel plant, it requires high process heat (typically 800–1500°C) for its core industrial operations, supplied by boilers, furnaces or direct combustion. Steel plants burn coal in blast furnaces or use electric arcs to melt scrap; in both cases the molten metal must be kept above 1,500°C and transferred through extensive hot piping and vessels.

Capacity & CO₂-intensity comparison computed from Climate TRACE industrial facilities data; sector role based on engineering reference.

What 4,044,261 t CO₂e a year looks like

This facility's estimated annual CO₂e (Climate TRACE, modelled) in everyday equivalents from the US EPA Greenhouse Gas Equivalencies calculator:

Equivalencies: US EPA Greenhouse Gas Equivalencies. Emissions: Climate TRACE.

Capacity vs largest steel plants in Mexico

Listed capacity (t of steel), Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).

Operator

Operated by Altos Hornos de Mexico SAB de CV.

Local climate

Altos Hornos De Mexico SA AHMSA steel plant sits in a hot semi-arid steppe climate zone (Köppen BSh), at 26.9°N in the northern hemisphere.

Köppen zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).

Site climate & environmental severity

This site sits in a benign, low-corrosion environment (estimated ISO 9223 class C1 — Very low), with dust abrasion the leading environmental stress.

In this site’s local climate, a bare 150 °C surface sheds about 1296 W/m² to ambient — roughly 1.00× the loss at a 20 °C reference. Reference-surface calculation at a 150 °C surface from WorldClim climate normals (ASTM C680 / ISO 12241) — an indicative per-climate comparison, not a measurement of this site’s specific equipment. Open method dataset: DOI 10.5281/zenodo.20787408 (CC BY 4.0).

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby sites

The #2 largest of 10 steel plants in Mexico by listed capacity (Climate TRACE).

Nearby industrial sites

• Hidalgo Cement Plant · Cement Plant · 51,809 t CO₂
• Ramos Arizpe Cement Plant · Cement Plant · 469,009 t CO₂
• DEACERO Ramos Arizpe steel plant · Steel Plant · 136,979 t CO₂
• Ternium Guerrero San Nicolás de los Garza steel plant · Steel Plant · 1,076,601 t CO₂
• Monterrey Cement Plant · Cement Plant · 56,915 t CO₂
• Ternium Apodaca steel plant · Steel Plant · 29,740 t CO₂

Location

Coordinates 26.87945, -101.41652. View on OpenStreetMap.

Frequently asked questions