On 31 July 2014, the Korean authorities initiated an antidumping investigation on imports of structural steel sections from China. The products subject to investigation are classified under the following HS codes: 7216.33 and 7228.70.

On 30 July 2015, the Korean authorities imposed a definitive antidumping duty on imports of structural steel sections from China. The rate of the duty imposed is 28.23% or 32.72% depending on the company.

On 3 April 2020, the Korean authorities announced the initiation of a sunset review of the definitive duty imposed on imports of the subject good from China.

On 30 March 2021, the Korean authorities issued a regulation extending the definitive duty imposed on imports of structural steel sections originating in China following the conclusion of the sunset review. The rate of duty ranges from 28.23% to 32.72% depending on the company.