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KS Posco Cilegon

operating

PT Krakatau Posco · BF–BOF Integrated route · Cilegon, Asia Pacific, Indonesia

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KS Posco Cilegon 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. The liquid steel is solidified into semi-finished shapes by continuous casting. The plant has a crude steel capacity of about 3.0 million tonnes per year. Its main products are slab, pig iron, cast iron, plate.

Process Route

BFBOF

Timeline

Announced2009
Construction2010
Operating2013

Emissions

2025

4.29 Mt CO₂e

1.90 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

3,000

BOF

3,000

Blast Furnace

3,000

Coking

1,320

Iron Units

BF
BF 1operating
3,000 ttpa3800 m³POSCO E&Cwiki
BF
unknown BF (1)announced
3,000 ttpawiki

Steel Units

BOF
unknown BOF (1)operating
3,000 ttpaPOSCO E&Cwiki
BOF
unknown BOF (2)announced
3,000 ttpawiki

Inputs & Energy

Power 200 MW Captive power plant; commissioned 1.6GW solar plant,

Steel Products

slab, pig iron, cast iron, plate

Ownership

Owner PT Krakatau Posco

Parent POSCO Holdings Inc [50.0%]; PT Krakatau Steel (Persero) Tbk [50.0%]

Workforce 2,746 employees

State ownership Partial

Country Context

Indonesia crude steel production (USGS). Plant line shows nominal capacity, not output.

Learn the processes this plant uses

Nearby Plants

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Plant data sourced from the Global Iron & Steel Tracker (March 2026), Global Energy Monitor. Licensed under CC BY 4.0.

Production data: USGS Minerals Yearbook — Raw Steel: World Production by Country or Locality (2019 edition; 2022 and 2023 early release tables). U.S. Geological Survey, public domain. EAF/BOF splits: USGS Minerals Yearbook (2023 estimates).

Facility emissions estimates from Climate TRACE. Licensed under CC BY 4.0.