SN MAIA Siderurgia Nacional steel plant — Portugal

SN MAIA Siderurgia Nacional steel plant is a steel plant in Portugal. 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 SN MAIA Siderurgia Nacional SA. It emits about 69,290 t CO₂e a year from Climate TRACE. That is 0.47% of the CO₂e from the 29 facilities in Portugal that have an emissions figure in IndustryAtlas.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-1567009.

In context: how this facility compares

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 69,290 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.

Operator

Operated by SN MAIA Siderurgia Nacional SA.

Local climate

SN MAIA Siderurgia Nacional steel plant sits in a warm-summer Mediterranean climate zone (Köppen Csb), at 41.3°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 corrosive environment (estimated ISO 9223 class C4 — High), with marine corrosion the leading environmental stress.

In this site’s local climate, a bare 150 °C surface sheds about 1355 W/m² to ambient — roughly 1.04× 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

Nearby industrial sites

• Super Bock Bebidas S.A. - Centro De Produção De Leça Do Balio (Ci) · Food & Beverage
• Matadouro Central De Entre Douro E Minho, Lda. (Ci) · Food & Beverage · 138,962 t CO₂
• Galp Energia Porto Refinery · Refinery
• Progado - Sociedade Produtora De Rações, S.A. · Food & Beverage · 298,824 t CO₂
• Carnes Landeiro, S.A (Ci) · Food & Beverage · 962,931 t CO₂
• Fromageries Bel Portugal S.A. - Fábrica De Vale De Cambra (Ci) · Food & Beverage

Location

Coordinates 41.25449, -8.5551. View on OpenStreetMap.

Frequently asked questions