Angang Steel Co Ltd - the listed arm of Anshan Iron and Steel Group Corp - will carry an ST tag, a type of bourse warning, on the Shenzhen Stock Exchange starting Friday after posting losses for two years in a row.

Angang Steel, a Liaoning-based steel maker, reported a 4.16 billion yuan ($670 million) loss in 2012, compared with a 2.1 billion yuan loss in the previous year.

According to bourse regulations, the company will have to change its stock name to ST Angang starting on Friday as a warning to investors of its loss-making record.