高级优质碳素结构钢P、S含量()。A、≤0.03%B、≤0.035%C、≤0.04%D、≤0.045%
高级优质碳素结构钢P、S含量()。
- A、≤0.03%
- B、≤0.035%
- C、≤0.04%
- D、≤0.045%
相关考题:
GB/T699-1999《优质碳素结构钢》中规定:优质钢的S、P含量为()AS≤0.030% P≤0.030%BS≤0.030% P≤0.035%CS≤0.035% P≤0.030%DS≤0.035% P≤0.035%
按钢中有害杂质磷(P)和硫(S)含量的多少,钢材可分为普通钢,优质钢,高级优质钢。普通钢磷含量不大于()%;硫含量不大于()%。A、0.035,0.035B、0.045,0.050。C、0.035,0.050
GB/T699-1999《优质碳素结构钢》中规定:优质钢的S、P含量为()A、S≤0.030% P≤0.030%B、S≤0.030% P≤0.035%C、S≤0.035% P≤0.030%D、S≤0.035% P≤0.035%
单选题GB/T699-1999《优质碳素结构钢》中规定:优质钢的S、P含量为()AS≤0.030% P≤0.030%BS≤0.030% P≤0.035%CS≤0.035% P≤0.030%DS≤0.035% P≤0.035%
单选题按钢的质量对钢进行分类,优质碳素钢中S、P的含量应()A分别小于0.055%和0.045%;B均小于0.04%;C分别小于0.03%和0.035%;D以上答案均不对。