Abstract: The tensile test of 20NV1300 and 27NV1400 non-oriented silicon steels in the range of 25 ~ 200 ℃ was carried out to study the influence of different ambient temperatures on the mechanical properties of non-oriented silicon steels. The results show that the mechanical properties of non-oriented silicon steel are sensitive to the ambient temperature. Within the test temperature range, the yield strength decreases with the increase of temperature, while the tensile strength decreases with the increase of ambient temperature within the range of 25 ~ 100 ℃. Due to the dynamic strain aging of non-oriented silicon steel at 100 ~ 200 ℃, its tensile strength increases in the range of 100~150 ℃ and decreases in the range of 150~200 ℃.

Key words: non-oriented silicon steel, ambient temperature, dynamic strain aging, mechanical property