POSCO and Hyundai Steel Co., South Korea's leading steelmakers, will cut the prices of their steel plates for cars starting next month, company officials said Tuesday, a move feared to hit their business performance this year. "In accordance with a request by our parent company Hyundai Motor, we have decided to cut steel plate prices by 80,000 won (US$74.77) per ton in March and April and by 90,000 won per ton from May to July," a Hyundai Steel official said, requesting anonymity.