S&W Corporation — Marine engine components, industrial fasteners and forging
Since 1967
60 yearsof working steel.
Founded in 1967 as Shinil Nut Industrial, a bolt and nut maker, S&W Corporation has grown into a precision parts manufacturer that forges, machines and heat-treats metal entirely in-house — from core components for marine diesel engines to special fasteners for nuclear and plant applications and its own forgings.
60 years of history- Founded
- 60th anniversary in 2027
- Listed on KOSDAQ
- Production sites
Business
Three businesses, one technology
From the heart of the engine to the joints of a plant. Every product grows from the same root: the technology of working metal.
01Marine Engine Components
Marine Engine Components
Camshafts that control fuel injection and valve timing, plus valve spindles, seat rings, engine bolts and piston pins — supplied for both large two-stroke and medium-speed four-stroke engines.
02Industrial Fasteners
Industrial Fasteners
Petrochemical and construction plants, offshore projects, heavy industry and nuclear power. For more than half a century we have supplied special fasteners that withstand high temperature, high pressure and corrosion.
03Forging
Forging
In-house forging with a 10-ton hydraulic hammer and air drop hammers. From raw material for engine parts to forgings for heavy equipment and industrial machinery, we shape it ourselves.
Technology & Quality
Every process in-house, from cutting to shipping
From the moment material is cut until it is packed, nothing is outsourced. Because every process is managed in-house, we can promise both quality and delivery.
01Material Cutting
Raw material is cut to specification.
02Forging
Shaped with our own hammers and presses.
03CNC · MCT Machining
Precision machining from roughing to cam profiles.
04Heat Treatment
Quenching, tempering and normalizing for structure and strength.
05Grinding
Bores, outer diameters and profiles are ground.
06Surface · Induction Hardening
Surface hardness and wear resistance are raised.
07Non-destructive Testing
Magnetic particle and penetrant testing detect defects.
08Final Inspection
Dimensions and appearance are checked on a CMM.
09Rust-proofing · Packing
Rust-proofed, packed and shipped.
Next 60
The challenge of the next 60 years
With technology proven in the most demanding places, we knock on the doors of harder markets.
- 01
Eco-friendly Marine Engines
Shipbuilding is moving to next-generation fuels such as LNG and methanol. Even as the fuel changes, the precision demanded of camshafts, valves and fastening bolts only rises.
- 02
Nuclear · Power Generation
Approved as a nuclear parts supplier in 1984, we have supplied the most demanding fasteners for power plants under the KEPIC and ASME quality systems.
- 03
Defense · Next-generation Materials
As a Defense Venture partner company we develop precision parts for defense, and we are preparing heat-resistant alloy technology for gas turbine blades.
Certified
A proven quality system
Quality · Certifications- ISO 9001
- ISO 14001 · 45001
- KEPIC MN · SN
- KR · DNV · NK Class Approvals
- PED · CPR (EU)
- MAN ES Manufacturing Approval
- INNO-BIZ Grade A
- Silver Tower Order of Industrial Service Merit
Investor Relations
Investors
KOSDAQ 103230. Financial highlights, disclosures and corporate notices.
Careers
Careers
We are looking for people to carry on the craft of working steel.
Contact
How can we help?
Email us- Engine Parts Sales+82-51-209-2214
- Industrial Parts Sales+82-51-209-2302
- Purchasing+82-51-209-2242