Differences between the Old and the New Version of GB/T 1040

The main differences between the old version and new version of GB/T 1040 were studied.The different results of tensile elongation at break,tensile strain at break,and nominal tensile strain showed that nominal tensile strain was more precise and truer compared with tensile elongation at break.And it was also suggested that attention should be paid and necessary comparison should be done when using different definitions.