Prestressing Steel 预应力钢材指各种应用于预应力张拉的钢材，如预应力钢丝、预应力钢绞线、预应力钢棒等材料，应用时长期受张力，给结构提供了受力状态改善的好处。预应力钢材不仅应用于预应力混凝土结构，还用于预应力钢结构、桥索、重载提升等。
分析、例举了预应力钢材力学性能试验中常见的误差！
The paper listed the common error in mechanical property test of PC steel products.
阐述获取预应力钢材低松弛性能的途径及其影响因素，并探讨其机理。
To expound the approach to get low relaxation property of prestress steel products and its effect factors, and the mechanism is discussed.
本文探讨了预应力钢材常温拉伸应力松弛试验中，初始试验力保持时间的意义与作用。
This paper describes the significance and role of the initial test load holding time in the tensile stress relaxation test at room temperature for the pre-stressed rolled steel.
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