Marcegaglia Fos Sur Mer steel plant — France

Marcegaglia Fos Sur Mer steel plant is a steel plant in France. Its listed capacity is 900,000 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 Marcegaglia Holding SpA. By capacity it ranks #3 among 10 steel plants in France. It emits about 34,764 t CO₂e a year from Climate TRACE. That is 0.07% of the CO₂e from the 117 facilities in France that have an emissions figure in IndustryAtlas. Its CO₂ per unit of capacity is 96% below the national median for this sector.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-1567252.

In context: how this facility compares

At 900,000 t of steel, Marcegaglia Fos Sur Mer steel plant is around the median steel plant in France (825,000 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 34,764 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 France

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

Operator

Operated by Marcegaglia Holding SpA.

Local climate

Marcegaglia Fos Sur Mer steel plant sits in a hot-summer Mediterranean climate zone (Köppen Csa), at 43.4°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 1350 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

The #3 largest of 10 steel plants in France by listed capacity (Climate TRACE).

Nearby industrial sites

• ArcelorMittal Méditerranée Fos sur Mer steel plant · Steel Plant · 4,780,174 t CO₂
• ExxonMobil Fos-sur-Mer Refinery · Refinery · 1,213,600 t CO₂
• INEOS Lavera Marseilles Refinery · Refinery · 2,443,631 t CO₂
• INEOS, Lavera · Petrochemical · 927,870 t CO₂
• Bouches-du-Rhône Department · Aluminium Smelter · 47,088 t CO₂
• Chaux De Provence Sacam · Lime Plant · 193,379 t CO₂

Location

Coordinates 43.445, 4.8468. View on OpenStreetMap.

Frequently asked questions