依据标准GB/T 228.1-2010中的要求,两种牌号Q460和Q690分别对三种规格14mm、20mm、28mm的试样进行屈服强度、抗拉强度、断后伸长率、断面收缩率和弹性模量的检验。由数据可得出两种牌号的钢板,小规格的屈服强度略大于大规格的。而抗拉强度、断后伸长率、断面收缩率和弹性模量的大小与规格大小无关。
According to the requirements of GB / T 228.1-2010, the yield strength, tensile strength, elongation after fracture, reduction of area and elastic modulus of 14mm, 20mm and 28mm samples of two grades Q460 and Q690 are tested respectively. From the data, it can be concluded that the yield strength of small-size steel plate is slightly greater than that of large-size steel plate. The tensile strength, elongation after fracture, reduction of area and elastic modulus are independent of the specification.