Hyosung Heavy Industries Corporation () is a South Korean heavy industries company specializing in power transmission and distribution solutions, transformers, construction and renewable energy. It is a subsidiary of Hyosung Group. 
In 2024, the company reported a revenue of 4.3 trillion KRW. Its operating income stood at 257.8 billion KRW, while the total number of employees was 3,291.
History.
Hyosung Heavy Industries was originally established in 1962 as HanYoung Industrial Co., Ltd. In 1969, it developed Korea's first 154kV extra-high-voltage transformer. The company was renamed as Hyosung Heavy Industries Corporation in 1977. Throughout the 1980s and 1990s, the company expanded its operations in power solutions and circuit breakers. In 2018, it was spun off from the Hyosung Corporation as an independent entity. Since 2019, the company has invested heavily in hydrogen energy and digital solutions to enhance its technological capabilities.
The company's headquarters is located in Seoul, South Korea. It also operates manufacturing plants in Changwon, South Korea. Additionally, the company has a global presence with locations in China, India, Vietnam, the Netherlands, and the United States. 
Business Areas.
Power Solutions.
Hyosung Heavy Industries is a major player in Korea’s power transmission and distribution sector, manufacturing extra-high voltage transformers, circuit breakers, and power equipment. The company also offers engineering, maintenance, and asset management solutions.
Electrical & Mechanical Solutions.
The company produces a wide range of electric motors and generators for industrial and power plant applications, including high-voltage and energy-efficient motors.
Sustainable Solutions.
Hyosung Heavy Industries is involved in hydrogen energy and grid stabilization solutions, developing power systems such as STATCOM, DC transmission, ESS, and microgrids.
Construction.
Operating through Chinhung International, Inc., the company engages in residential and commercial construction, SOC projects, and real estate development under the ‘Hyosung Harrington Place’ brand.