Forging Supplier for South Korea: Shipbuilding, Defence, and Nuclear Industry

August 10, 2026


South Korea is the world’s largest shipbuilder (HHI, Samsung Heavy Industries, DSME/Hanwha Ocean), a major global defence exporter (K2 tank, K9 howitzer, FA-50 fighter, Type 214 submarine), and operates the world’s most nuclear-intensive electricity system outside France. Korean shipyards build 30–40% of global merchant tonnage annually, consuming massive quantities of propulsion shaft and structural hull forgings. The Korean defence export boom Poland, Australia, Norway, Egypt, UAE all purchasing Korean systems creates demand for specialty alloy steel forgings at volumes exceeding domestic Korean forge shop capacity. Indian forging manufacturers can supply into Korean industrial and defence supply chains.

CompanySectorKey ForgingStandard
Hyundai Heavy Industries (Ulsan)Shipbuilding — VLCCs, container shipsPropulsion shaft, rudder stock, crankshaftABS / DNV / Lloyd’s Register
Samsung Heavy Industries (Geoje)Shipbuilding — LNG carriers, FPSOsPropulsion shaft, LNG structural fittingsABS / DNV
Hanwha Ocean / DSME (Geoje)Shipbuilding, naval submarinesPressure hull fittings, propulsion shaftROKN specs, ABS
Hyundai Rotem (Seoul)Defence — K2 tank, railway vehiclesFinal drive gear blanks, torsion barsDAPA (Korean MoD)
KEPCO NF (Daejeon)Nuclear fuel / reactor maintenanceSA-508 Grade 3 nozzle forgingsKEPIC, ASME Section III

Hyundai Heavy Industries — the world’s largest shipbuilder builds VLCCs (Very Large Crude Carriers), container ships, LNG carriers, and naval vessels at its vast Ulsan shipyard complex. HHI builds 70–90 vessels per year across all types, each requiring multiple propulsion shaft forgings. A VLCC propulsion shaft in 4340 alloy steel weighs 15,000–25,000 kg at the upper limit of Indian open die capability but within reach of Bharat Forge’s higher-capacity presses. Smaller intermediate shaft and coupling forgings (2,000–8,000 kg) are more accessible. HHI’s Korean Classification Society (KR) certification is required for Korean-flagged vessels but ABS, DNV, and Lloyd’s Register are accepted for international vessel orders.

South Korea’s defence export success — driven by the K9 Thunder howitzer, K2 Black Panther tank, and FA-50 light combat aircraft has created production demands that stretch Korean domestic forging capacity. The K9 howitzer alone is on order from 11 countries (Poland, Norway, Egypt, India, Australia, Estonia, Finland, Australia among others) with total orders exceeding 2,000 vehicles. K9 barrel blank forgings in 55NiCrMoV6 gun steel are produced by Korean domestic forgers but the production rate acceleration creates potential for qualified international forging sources. India, which has its own K9 Vajra-T programme (100 vehicles assembled by L&T), has an established Korea-India defence manufacturing relationship.

KEPCO Nuclear Fuel Company (KNF) and KEPCO Engineering & Construction Company manage South Korea’s nuclear programme 26 APR-1400 reactors operating and under construction domestically, plus APR-1400 export contracts for UAE (Barakah, four units operational) and potential new export programmes in Saudi Arabia, Czech Republic, and Poland. Korean nuclear forging procurement applies KEPIC (Korean Electric Power Industry Code) equivalent to ASME Section III as discussed in the UAE blog. The large scale of the Korean nuclear programme creates sustained SA-508 Grade 3 nozzle forging demand through KEPCO NF’s procurement organisation.

Samsung Heavy Industries — specialising in LNG carriers and FPSOs builds vessels with complex LNG containment systems requiring cryogenic-grade stainless steel structural fittings. SHI’s LNG carrier propulsion shafts and structural fittings require ABS or DNV classification survey the same requirements as European LNG carrier construction. SHI has built over 200 LNG carriers the world’s largest LNG carrier orderbook making it one of the most significant single-site consumers of marine propulsion forgings globally.

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Vinir Engineering — Capability for this Market

  1. AS9100D.
  2. ABS approved manufacturer for Korean shipbuilding propulsion shaft and structural forgings — HHI, SHI, and Hanwha Ocean supply chain access.
  3. 4340 alloy steel propulsion shaft forgings to 15,000 kg with ABS Grade 3/4 survey.
  4. A182 F316L cryogenic structural fittings for SHI LNG carrier programmes.
  5. KEPIC-compatible quality system for KEPCO NF nuclear nozzle forging supply.
  6. 45CrNiMoVA and 55NiCrMoV6 for Korean defence howitzer and armoured vehicle programmes.
  7. Ocean freight Chennai to Busan or Ulsan: 10–14 days — among the shortest ocean transit times from India.

Frequently Asked Questions

1.What is Korea Register (KR) and how does it relate to ABS and DNV for Korean shipbuilding?+–
Korea Register of Shipping (KR) is South Korea’s national classification society equivalent to ABS (American), DNV (Norwegian), Lloyd’s Register (British), and Bureau Veritas (French). KR is an IACS full member, meaning KR-surveyed forgings meet the same international quality standards as ABS or DNV-surveyed equivalents. Korean-flagged vessels are typically KR-classed; vessels built for international owners at Korean yards are classed by the owner’s preferred society (ABS, DNV, Lloyd’s, BV). For Indian forging manufacturers supplying Korean shipyards, ABS or DNV survey approval (which most already have or can arrange) is more commonly required than KR-specific approval since most Korean yard production is for international vessel owners.
2.What is the K9 howitzer and why does its global export success matter for Indian forging manufacturers?+–
The K9 Thunder is a 155mm/52-calibre self-propelled tracked howitzer produced by Hanwha Defence in South Korea. K9 is on order from 11 countries Poland (648), Norway (24), Egypt (200+), India (100 as K9 Vajra-T assembled by L&T), Australia (30), Estonia (18), Finland (48), Romania (54), and others. Each K9 requires a gun barrel blank forging in 55NiCrMoV6 gun steel (vacuum arc remelted), weighing approximately 800–1,200 kg in the rough-forged condition. The production rate expansion across all these export programmes is straining Korean domestic barrel forging capacity. Hanwha Defence’s established relationship with India (K9 Vajra-T programme with L&T) creates a natural channel for Indian forging manufacturers to approach Hanwha’s barrel blank supply chain.
3.What is KEPIC and how does it apply to South Korea’s nuclear forging procurement?+–
KEPIC (Korean Electric Power Industry Code) was developed by the Korean Electric Association to provide a Korean-language equivalent to ASME codes for nuclear and power plant equipment. KEPIC ME (Mechanical Equipment) is equivalent to ASME Section III; KEPIC MN (Quality Assurance) is equivalent to NQA-1 and 10CFR50 Appendix B. South Korea’s operating APR-1400 reactors and the Barakah UAE units all use KEPIC-qualified components. For Indian forging manufacturers supplying KEPCO NF (nuclear fuel and component company), NQA-1-compatible quality systems satisfy KEPIC MN requirements because both codes implement the same 18-quality-criteria framework. SA-508 Grade 3 material specifications are referenced directly in KEPIC the same material used for US and French nuclear RPV nozzle forgings.
4.What LNG carrier construction volume does Samsung Heavy Industries create and what forging content does each vessel contain?+–
Samsung Heavy Industries (SHI) has consistently held the world’s largest LNG carrier orderbook typically 50–80 vessels under contract at any time, with annual deliveries of 15–25 LNG carriers plus FPSOs and other complex offshore vessels. Each LNG carrier (typically 174,000 cubic metre Q-Flex or Q-Max class) requires: a propulsion shaft forging (twin-shaft propulsion, each shaft 2,000–5,000 kg), rudder stock forgings (one per shaft), and multiple structural hull fittings and flange forgings for the LNG containment system interfaces. At 20 LNG carriers delivered per year, SHI alone generates 40+ major propulsion shaft forgings annually plus hundreds of smaller structural forgings a significant sustained demand for ABS or DNV surveyed marine forging suppliers.
5.How does the India-South Korea CEPA affect import duties on Indian forgings entering Korea?+–
The India-Korea Comprehensive Economic Partnership Agreement (CEPA), in force since 2010, provides preferential duty rates for Indian goods exported to South Korea. For steel forgings, the CEPA duty rate is lower than Korea’s MFN tariff most alloy steel forging categories benefit from reduced or zero duties under CEPA provisions. This preferential duty access gives Indian forging manufacturers a tariff advantage over Chinese, Japanese, and European competitors supplying the Korean market. The India-Korea CEPA is one of the most commercially significant preferential trade agreements for Indian forging exporters targeting Northeast Asian markets the combination of CEPA duty preference and India’s ex-works cost advantage creates a strong competitive position for Indian manufacturers in the Korean industrial procurement market.