Q345qDNH bridge weathering steel plate, Q345qDNH steel plate fixed rolling, Q345qDNH chemical compos

Q345qDNH bridge weathering steel plate, Q345qDNH steel plate fixed rolling, Q345qDNH chemical compos

Q345qDNH bridge weathering steel plate, Q345qDNH steel plate fixed rolling, Q345qDNH chemical composition

Q345qDNH is called bridge weathering steel plate, N - the first letter of the word "resistance" in Chinese pinyin;

Q345qDNH implements the standard GB/T714-2015, and there is no weather resistance performance of the same grade of bridge steel, which is expressed as Q345qD

Q345qDNH steel plate fixed rolling: Wugang to the sun

Q345qDNH Thickness Direction Performance:

The material thickness direction performance grades are expressed as: Q345qDNHZ15, Q345qDNHZ25, Q345qDNHZ35.

Similar materials have Q345qENH and Q345qFN

Bridge slabs are steel plates that are specially used to erect railway or highway bridges. It is required to have high strength, toughness and withstand the load and impact of rolling stock, and to have good fatigue resistance, certain low-temperature toughness and atmospheric corrosion resistance. Welded bridge steels should also have good weldability and low notch sensitivity.

Q345qDNH Chemical Composition Analysis:

Q345qDNH carbon C: not more than 0.15

Q345qDNH manganese Mn: 1.00-1.50

Q345qDNH silicon Si: 0.15-0.50

Q345qDNH sulfur S: not greater than 0.010

Q345qDNH phosphorus P: no more than 0.025

The difference between C, D, and E refers to the difference in impact temperature in their properties. They are: Q345qC grade, which is 0 degree impact; Q345qD grade, is -20 degree impact; Q345qE grade, is -40 degree impact. The value of the impact varies depending on the impact temperature.