The marine mooring chain steel (R4) has been developed through the composition design,heat-treatment performance investigation and pilot-plant test.

• 开发的海洋四级系泊锚链产品,通过成分设计、热处理特性的试验研究及工业性试制,生产出的热轧棒材具有较高的抗拉强度、较高的低温冲击值;