The A709-50F-2 material is alloy structural steel, used to manufacture riveted and bolted road bridges and railway bridges (including cross-sea bridges). 50 is the grade in the ASTM A709/A709M standard (A709 Grade 50), that is, structural steel for bridges with a yield strength ≥345MPa. F: Critical fracture tensile member-a product used for tensile member in critical fracture structure. -2: Charpy V-notch impact test area code.
Steel products for bridges have the advantages of stable quality, excellent Z-direction performance and excellent welding performance. The A709-50 bridge steel produced by BBNsteel is used in the construction of more than 50 bridges at home and abroad: the most representative building on the west coast of Rose-and the Jinshan Oakland Bay Bridge, the world's long-span road-rail dual-use cable-stayed bridge-Shanghai The Yangtze River Bridge, my country's road-rail dual-purpose sea-crossing bridge--Pingtan Bridge, World Arch Bridge--Chongqing Chaotianmen Bridge, large-scale bridge and tunnel combination project--Hong Kong-Zhuhai-Macao Bridge, etc.
A709-50F-2 Bridge Steel ApplicationThis steel used to build railway and highway bridges. It is required to have high strength and sufficient toughness, low notch sensitivity, good low temperature toughness, anti-aging sensitivity, fatigue resistance and welding performance. The main steel used is low-alloy high-strength steel such as Q345q, Q370q, A709 Grade 50 and Q420q.
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