隨著中國現(xiàn)代化的進(jìn)程，鋼在建筑中的作用也越來越大，而Q345熱軋板作為目前成熟的、綜合性能強的鋼材，使用占比非常高，且多以鋼板的形式使用。

With the process of China's modernization, the role of steel in the construction is becoming more and more important, and Q345 hot rolled plate as a mature, comprehensive performance of steel, using a very high proportion, and mostly used in the form of steel plate.

例如著名的“鳥巢”，該建筑項目結(jié)構(gòu)用鋼中Q345熱軋板規(guī)格的鋼板需求總量非常龐大，采用的是寶鋼鋼材Q345。

For example, the famous "Bird's Nest", the building project structure steel Q345 hot rolled plate steel demand is very large, using Baosteel steel Q345.

目前橋梁主要使用得鋼材為具有較高強度且易于焊接的鋼材。Q345作為專門的橋梁用鋼，該鋼強度高、焊接性能好、抗腐蝕性能強，可節(jié)約金屬和減輕設(shè)備自重，目前正逐漸取代普通碳素鋼成為主流。

At present, the bridge is mainly used in steel with high strength and easy to weld steel.Q345 as a special bridge steel, the steel has high strength, good welding performance, strong corrosion resistance, can save metal and reduce the weight of equipment, is gradually replacing ordinary carbon steel as the mainstream.

以Q345鋼為基開發(fā)出的Q345GNH鋼，適用于耐大氣腐蝕的熱軋、冷軋鋼板、鋼帶和型鋼，是介于普通鋼和不銹鋼的一種物美價廉的鋼種，可用于車輛、集裝箱、建筑、塔吊和其它結(jié)構(gòu)用的產(chǎn)品。也可用作螺栓連接、鉚接和焊接的結(jié)構(gòu)鋼，但用作焊接用結(jié)構(gòu)鋼的厚度一般不大于16mm。

Q345GNH steel developed based on Q345 steel is suitable for hot-rolled, cold-rolled steel plate, steel strip and type steel. It is a cheap steel type between ordinary steel and stainless steel, which can be used for vehicles, containers, buildings, tower cranes and other structural products.It can also be used as bolted, riveted and welded structural steel, but its thickness for welding is generally not greater than 16mm.

Q345鋼的拉伸性能顯著：韌性較好、抗彎和抗剪性能強等。目前各種提高鋼材焊接性的技術(shù)已比較成熟，而且Q345作為比較早就開發(fā)的低合金高強度鋼，焊接性能已能適用于各種場合。所以廣泛用作一般結(jié)構(gòu)用鋼，諸如廠房、建筑、輸電線塔等一般用途的焊接金屬結(jié)構(gòu)。

The tensile performance of Q345 steel is remarkable: good toughness, strong bending and shear resistance.At present, various kinds of technology to improve the weldability of steel has been relatively mature, and Q345 as a relatively early developed low alloy high strength steel, welding performance has been suitable for various occasions.Therefore, it is widely used as a general structure of steel, such as factories, buildings, transmission line towers and other general uses of welding metal structure.