Producer
POSCO Holdings
South Korean integrated steel producer; world #4 (37.79M MT in 2024). Pohang and Gwangyang steelworks. Produces structural steel plate (KS D 3515 equivalent to S355/S460). Supplies Korean shipbuilders, offshore structures, and heavy machinery makers. Also entering lithium and secondary battery materials as strategic pivot.
6
Inputs supplied
8
Goods downstream
5
Facilities
0
Stories
What they make
6 inputs POSCO Holdings supplies
Click an input to see every good that depends on it, every country that produces it, and every other company in the supply chain.
manufactured
Corten / Weathering Steel (Container Panels) →
manufactured
Grain-Oriented Electrical Steel (GOES / CRGO) →
manufactured
Hot-dip galvanized steel →
manufactured
Electrolytic Tinplate (ETP) →
manufactured
Fly Ash & Slag (SCMs) →
manufactured
High-Strength Structural Steel (Q460 / S355) →
Where it shows up
Goods downstream
Essential goods that depend on something POSCO Holdings makes, pick one to see the full supply chain.
Where they make it
5 facilities
POSCO Gwangyang Works — HSLA/Container Steel →
KRSouth Jeolla · manufacturing
POSCO Gwangyang is South Korea's largest steel plant by volume (capacity ~20 MT/year); primary production site for HSLA and weathering steel grades used in shipping containers; supplies container makers in China and Korea.
POSCO Pohang GGBFS Granulation Plant →
KRPohang, North Gyeongsang · chemical_plant
POSCO is a major GGBFS producer from its Pohang and Gwangyang blast furnaces (~5% global share). South Korean GGBFS is a major US import source — filling the gap left by the near-absence of US domestic GGBFS granulation capacity. US slag cement consumption (~8 Mt/year) heavily depends on Korean and Japanese imports.
POSCO Pohang Integrated Steel Works →
KRPohang, South Korea · steel mill
World's largest single-site steel complex; 17.4 million MT/year raw steel capacity; primary source of high-strength steel and corten/weathering steel for CIMC container manufacturing
POSCO Pohang Works →
KRPohang, North Gyeongsang · manufacturing
POSCO's founding facility and largest integrated steel complex. Produces HDG coil for construction, automotive, and structural applications. Major exporter to SE Asia and US.
POSCO Pohang Works (Tinplate) →
KRPohang, North Gyeongsang · rolling_mill
POSCO's primary tinplate production site; also produces galvanized and cold-rolled steel. POSCO Gwangyang Works (South Jeolla) is a secondary site. POSCO also holds a JV in Qinhuangdao, China (Zhongyue POSCO, 250,000 MT/year tin-plated sheets).
What else they do
Business segments
The company's full revenue map, where this supply-chain role fits within their broader business.
Steel (Flat Products)
40%Steel (Plate & Structural)
30%Stainless Steel
15%Secondary Battery Materials
10%Lithium & Critical Materials
5%
Intelligence
What's known
Sourced claims about this company's role in supply chains, chokepoints, concentration, incidents, dual-use connections.
Did you know2024
POSCO, South Korea's dominant steelmaker and a major supplier of structural steel for crane and heavy machinery applications, is simultaneously the world's largest lithium producer targeting battery materials for electric vehicles. POSCO Holdings (the parent created in 2022) is investing heavily in lithium mining (Argentina, Australia), cathode and anode materials, and EV battery supply chains — aiming to become a leading materials company alongside its steel business. The company that supplies structural steel for Korean heavy machinery also controls significant lithium resources for EV batteries — a dual supply chain role spanning the old and new economies.
POSCO Holdings Inc. ↗Origin2022
POSCO's Pohang works was built with US foreign aid money in 1968 — South Korea had no iron ore, no coking coal, and no steelmaking tradition, yet it is now one of the world's most efficient mills POSCO was founded in 1968 with $100M in Japanese war reparations and World Bank financing, over the objections of US advisors who deemed South Korean steel unviable. The Pohang Integrated Steel Works (POSCO's main plant) became operational in 1973 and reached 9 Mt/yr capacity by 1981. With no domestic iron ore or coking coal, POSCO built a supply chain importing 100% of raw materials from Australia, Brazil, and Canada — yet achieved cost efficiencies that made it the world's lowest-cost integrated steelmaker by the 1990s, disrupting the US and European industries.
POSCO Holdings ↗Capacity2023
POSCO began construction of a new KRW 1 trillion ($740 million) eco-friendly high-efficiency electrical steel facility at its Gwangyang Works (South Jeolla Province, South Korea) to add 300,000 tonnes/year of high-grade non-oriented and grain-oriented electrical steel capacity, targeting completion by 2025. POSCO is simultaneously planning to build additional electrical steel factories in North America — an announcement made in 2023 — targeting the growing US EV and grid transformer market. POSCO's total electrical steel capacity when the expansion completes reaches 1.13 million tonnes per year.
POSCO Newsroom ↗