Abstract: As the second largest hydropower station in China, Baihetan hydropower station has a total installed capacity of 16 000 MW. It has the characteristics of high water head, large installed capacity and large HD value. To ensure its safe operation, 38 900 tons of steel were used to make penstocks, including 10 100 tons of 800 MPa high-strength steel. This is the first case where thickness of 800 MPa penstock reaches 68 mm in domestic hydropower industry. By studies on 800 MPa high-strength steel and a large number of tests, it is proved that the use of 800 MPa high-strength steel meets the function requirements of large power stations.

Key words: high-strength steel, 800 MPa, design and application, Baihetan hydropower station

摘要： 白鹤滩水电站是中国第二大水电站，总装机容量为16 000 MW，存在水头高、装机容量大、HD值大等特点。为确保电站永久运行安全，压力钢管用钢量达3.89万t，其中800 MPa级高强钢量1.01万t，并且是国内水电行业800 MPa压力钢管壁厚首次做到了68 mm级。对800 MPa级高强钢开展一系列研究，并进行大量生产性试验，确保了800 MPa级高强钢使用满足大型电站的功能要求。

关键词: 高强钢, 800 MPa级, 设计应用, 白鹤滩水电站