耐候鋼（gāng）管概述：其特征在於：耐候鋼管的（de）合金成分及重量百（bǎi）分比含（hán）量為：C：0.12～0.21、Si：0.2～2.0、Mn：0.7～2.0、S ≤0.036、P≤0.034、Cu：0.10～0.40、Al<0.2，其餘為Fe和微量雜質。通過Cu、 Mn、Si、Al等合金化，並簡（jiǎn）單（dān）調整普通低（dī）碳鋼(Q235鋼)的部分元素含量，在不（bú）需改變（biàn）Q235鋼生產工藝（yì）條件下，就能（néng）生產（chǎn）出具有良好的耐大氣腐蝕性能、綜合機械性能的經（jīng）濟耐候（hòu）鋼管。
Summary of Weatherproof Steel Pipe: Characteristic: The alloy composition and weight percentage content of weatherproof steel pipe are: C: 0.12-0.21, Si: 0.2-2.0, Mn: 0.7-2.0, S < 0.036, P < 0.034, Cu: 0.10-0.40, Al < 0.2, the rest are Fe and trace impurities. Through alloying of Cu, Mn, Si and Al, and simply adjusting the element content of common low carbon steel (Q235 steel), economic weatherproof steel pipes with good atmospheric corrosion resistance and comprehensive mechanical properties can be produced without changing the production process of Q235 steel.
