South Korean Steel Mills by Product: plates, profiles, pipes and special steels
public-source-checked (KR-01/KR-02 batches); verify current ownership, plant scope and works-specific certifications before a tender or contract.
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A buyer-focused guide to the South Korean steel industry, major corporate groups and producer identities.
A buyer-focused guide to the South Korean steel industry, major corporate groups and producer identities.
This product map is a starting shortlist, not a claim of availability for every grade, size or project specification.
Heavy plate and structural steel
- POSCO: major integrated flat-product system, including plate; check works and heat-treatment route.
- Hyundai Steel: heavy plate for shipbuilding/offshore applications and structural H-sections, channels, angles and sheet piles.
- Dongkuk Steel: hot-rolled operation relevant for plate and long products.
Structural sections and piles
Hyundai Steel is a strong first reference for hot-rolled structural sections and sheet piles. Do not assume an EN dimensional-standard listing means every EN strength/toughness combination is certified.
Welded steel pipe — ERW/HFW
- SeAH Steel publishes ERW/HFW and SAW processes; the route and works are confirmed per order.
- Hyundai Steel Pipe is a dedicated welded-pipe maker (ERW, LSAW and spiral).
- Husteel lists ERW/HFW, SAW and galvanized pipe.
- NEXTEEL markets OCTG, line pipe and ordinary/structural welded tube.
- HISTEEL is listed for pipes, tubes and hollow profiles; obtain works-specific specifications before assuming any large-diameter or offshore scope.
Welded steel pipe — LSAW and spiral
- Hyundai Steel Pipe publishes LSAW and spiral-welded production at Ulsan.
- Husteel describes a large-diameter SAW operation at Gunsan (completed 2024).
- SeAH Steel publishes press-formed and roll-bent SAW offshore-pipe manufacturing. Confirm seam design, manufacturing route, acceptable circumferential welds and inspection scope.
Seamless pipe
- SeAH CSS offers specialty steel and seamless-tube product families, including stainless-related production.
- ILJIN Steel produces hot seamless and precision cold-drawn tube. Do not confuse these with SeAH Steel’s welded-pipe portfolio.
Stainless tube and stainless sheet
- SeAH CSS for stainless seamless/specialty tube.
- Hyundai BNG Steel for cold-rolled stainless sheet (flat product, not tube).
Flat products — cold-rolled, coated and tinplate
- KG Steel for cold-rolled, galvanized, colour-coated and tinplate products.
- Dongkuk CM for the Dongkuk group’s cold-rolled and coated-sheet business.
- POSCO and Hyundai Steel for broad flat-product ranges.
Structural sections, angles and channels
- Hyundai Steel for H-sections, channels, angles and sheet piles.
- Fine Besteel for angles, channels and specialist rolled sections.
- Dongkuk Steel for hot-rolled plate and long products.
Rebar and EAF long products
- KISCO / Korea Iron & Steel for EAF billets and reinforcement steel.
Special round bars and forgings
SeAH Besteel is relevant for special bar, billets/blooms and forging applications. Confirm exact metallurgical route, UT, heat treatment and material standard.
Qualification caveat
Published company capabilities are not equivalent to live AVL approval. Use the original manufacturer's mill-test certificate, current certificates and project documents before confirming suitability.
References and verification sources
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South Korean Steel Mills by Product: plates, profiles, pipes and special steels
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