钢材的抗拉强度、屈服强度、面缩率及冲击值是反映钢材性能的几个主要常规指标。它们之间有着内在联系及特定的关系。而在数值上相互关系的寻找可以借助于数学方法。如使用回归分析的方法,通过一系列的试验数据的计算得出经验公式,进而利用经验公式由已知数据估算所要求的未知数。诸如通过拉力试验所测得的抗拉强度及面缩 Steel tensile strength, yield strength, surface shrinkage and impact value is to reflect the performance of several major steel conventional indicators. There are inherent and specific relations between them. The numerical correlation between the search can resort to mathematical methods. For example, using the method of regression analysis, the experience formula is obtained through the calculation of a series of experimental data, and the empirical formula is used to estimate the required unknowns from the known data. Such as tensile strength and reduction measured by tensile testing