Altos Hornos De Mexico SA (AHMSA)
mothballedBF–BOF Integrated route · Monclova, North America, Mexico
GEM wikiAltos Hornos De Mexico SA (AHMSA) makes steel by the integrated route: iron ore is smelted into liquid hot metal in a blast furnace, then refined into crude steel in a basic oxygen furnace. Alongside the ore-based route, the plant runs an electric arc furnace that melts scrap and other metallics. The liquid steel is solidified into semi-finished shapes by continuous casting. The plant has a crude steel capacity of about 5.5 million tonnes per year.
Process Route
Timeline
Emissions
2025
2.57 Mt CO₂e
1.23 t CO₂e per tonne of steel
Typical BF-BOF route: 1.8–2.0 t/t
Modelled estimate (Climate TRACE), not reported data. Methodology
Capacity (ttpa)
Crude Steel
5,500
EAF
1,200
BOF
4,300
Blast Furnace
4,380
Sinter
2,263
Coking
821
Pelletising
4,200
Production
Crude steelproduction, GEM-compiled (Global Iron & Steel Tracker). Dashed line shows nominal capacity.
Iron Units
Steel Units
Inputs & Energy
Power 40 MW onsite gas-fired power plant (generates more than 50% of steel plant's electricity)
Iron ore MINOSA & CEMESA Mexican iron mining subsidiaries
Met coal MICARE & MIMOSA Mexican coal-mining subsidiaries
Steel Products
sheet, profile, plate
Ownership
Owner Altos Hornos de Mexico SAB de CV
Parent Grupo Acerero del Norte SA de CV [64.0%]; small shareholder(s) [36.0%]
Workforce 7,366 employees
Country Context
Mexico crude steel production (USGS). Plant line shows nominal capacity, not output.
Learn the processes this plant uses
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Location
Monclova
North America
Mexico
26.8769°, -101.4166°
At a Glance
- Route
- BF–BOF Integrated
- Crude steel capacity
- 5,500 ttpa
- Commissioned
- 1944
- Products
- Semi-finished, finished rolled