Explanation
For engineering structural steel used for manufacturing bridge structures, the performance steel designation followed by q represents steel for bridge construction, which mainly uses plates and some profiles, such as H section steel, channel steel, etc. Railway and highway bridges bear the impact load of vehicles, so steel used for bridges is required to have sufficient rigidity, strength, toughness, good fatigue strength and low notch sensitivity. At the same time, steel product has high requirements for surface quality and weather resistance. Bridge structural members are widely connected by riveting and weld, and steel used for weld members also needs to have good weld performance. structural steel for bridges (GB/T714-2008) mainly adopts non alloy structural steel and low alloy high-strength steel.
Classification
Metals -> Steels -> Alloy steels