1、Q235的屈服强度下限为235MPa,Q345的屈服强度下限为345MPa(Q的意义为汉字的"屈"字,后面的数值代表屈服强度下限) o: TO[
2、二者合金含量不同:Q235为普通碳钢,Q345为低合金钢 |FH/Q-7[
https://baike.baidu.com/item/Q235%E9%92%A2%E7%AE%A1/1725538?fr=aladdin koe&7\ _@
https://wenku.baidu.com/view/af3eaf8bddccda38366baf0c.html oMcX{v^"
钢管DN尺寸对照表 7x`uGmp1
https://wenku.baidu.com/view/387718aeb8d528ea81c758f5f61fb7360b4c2b36.html n
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https://product.11467.com/info/309566.htm }*;Hhbox
Q235钢管支撑强度及稳定性计算 !<@Zf4m
https://wenku.baidu.com/view/3f4ae5644028915f814dc212.html