Ann Joo Integrated Steel Penang plant — Malaysia

Ann Joo Integrated Steel Penang plant is a steel plant in Malaysia. 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 Ann Joo Integrated Steel Sdn Bhd. By capacity it ranks #6 among 8 steel plants in Malaysia. It emits about 642,630 t CO₂e a year from Climate TRACE. That is 1.5% of the CO₂e from the 39 facilities in Malaysia that have an emissions figure in IndustryAtlas. Its CO₂ per unit of capacity is 23% below the national median for this sector.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-32440920.

In context: how this facility compares

At 900,000 t of steel, Ann Joo Integrated Steel Penang plant is below the median steel plant in Malaysia (1,250,000 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 642,630 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 Malaysia

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

Operator

Operated by Ann Joo Integrated Steel Sdn Bhd.

Local climate

Ann Joo Integrated Steel Penang plant sits in a tropical rainforest climate zone (Köppen Af), at 5.4°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 an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion the leading environmental stress.

In this site’s local climate, a bare 150 °C surface sheds about 1226 W/m² to ambient — roughly 0.94× 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 #6 largest of 8 steel plants in Malaysia by listed capacity (Climate TRACE).

Nearby industrial sites

• Southern Steel Prai Penang plant · Steel Plant · 177,766 t CO₂
• MYS-Kuala Muda_methanol · Chemical Plant · 25,812 t CO₂
• Malayan Cement Padang Rengas Cement Plant · Cement Plant · 987,214 t CO₂
• Malayan Cement Kanthan Cement Plant · Cement Plant · 1,112,057 t CO₂
• Tasek Corporation Ipoh Cement Plant · Cement Plant · 751,698 t CO₂
• Aalborg Portland Malaysia Ipoh Cement Plant · Cement Plant · 197,573 t CO₂

Location

Coordinates 5.38064, 100.37703. View on OpenStreetMap.

Frequently asked questions