《Table 3 Tensile properties of samples》

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《The effect of cooling rate and coiling temperature on the microstructure and mechanical properties of a plain carbon steel》

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Tensile experiments w ere performed at room temperature according to the national standard GB/T228.1-2010，and the results are show n in Table 3.Based on the results of samples S1，S2，and S3，the conventionally tested steel show ed a yield strength of 387 M Pa，a tensile strength of 531 M Pa，and an elongation of 24.3%w hen the coiling temperature is580℃.These properties slightly change for the IC sample.How ever，compared w ith LC，yield strength and tensile strength w ere improved about 137 and85 M Pa，respectively，w hile the elongation w as decreased by only 2 percentage points for UFC.Comparing the results betw een sample S3 and S4reveals that the yield strength and tensile strength of the steel plate increased to 608 and 682 M Pa，and the elongation reduced to 15.8%w hen the coiling temperature w as reduced from 580 to 500℃at a cooling rate of 120 K/s through UFC.