normal steel meaning in English

正常钢
正常结构钢

There is much illogicality with the formula for the calculation of internal plane in the actual modes for the normal steel and the lightweight steel
现行普钢规范和轻钢规程中规定的平面内稳定计算公式存在一些不合理的地方。
And then we used the armor plate to do the experiment , we found that the thin silicon steel board which poses high magnetism conductance rate is far better than the normal steel board
选择钢板材料作涡流加热实验时，发现具有高磁导率的薄硅钢板的涡流热效应明显比普通钢板好。
As a result of a research , service life ( gets red rust ) of galvanized steel is 15 - 18 years around countryside , 3 - 5 years around industry region ， which is n - tupling even ten - tupling than a normal steel
经研究，在镀锌量350克平方米（单面）时，镀锌钢板在屋外的寿命（生红锈），田园地带约为15一18年，工业地带大约3一5年，这比普通钢板长几倍甚至十几倍。
Based on the usually used stability theory for the normal steel structure , the non - stability are divided into three sorts according to the performance after instability , as the balance fork instability , jump instability and extreme point instability
根据一般钢结构应用的稳定理论，常按屈曲后性能将失稳分为以下三类：平衡分岔失稳、跃越失稳和极值点失稳。