抗拉强度如何进行数值修约直接影响测试结果，在介绍国标（GB）、航标（HB）和美标（ASTM）对抗拉强度数值修约规定的基础上，通过分析同一组抗拉强度原始试验数据按不同标准进行数值修约结果的差异性，给出了不同标准规定的数值修约方法的适用范围。结果表明：按不同标准修约得到的结果差异较大，需按照所依据的抗拉强度检测标准中规定的修约规则进行修约。

How to round the tensile strength test values will directly affect the test results. On the basis of introduction of data rounding rules of national standards (GB), aviation standards (HB) and American Society of Testing Materials standards (ASTM), and by analyzing the difference among the rounding results of the same set of tensile strength original test data according to different standards, the application scope of data rounding method of different standards was given. The results show that the rounding results had a large difference according to different standards. The tensile strength test data should be rounded according to the rounding rules specified in the corresponding tensile test standards.