Attentions in machining Q690C carbon steel plate sheet

The mechanical properties of ASTM A514 steel plate are similar to that of Q690 in China. The hardness of A514 steel plate is 235-290, yield strength is more than 630Mpa and tensile strength is more than 700MPa. Q690C carbon steel plate sheet, A514 Gr F steel plate is mostly used in places where high tensile strength and high yield strength are required, such as lifting gear of engineering vehicle, rack of large excavator and offshore platform.

Temperature has a great influence on the strength of the material, Q690C carbon steel plate sheet. When the temperature exceeds a certain value, the strength limit of the steel will be reduced. The higher the temperature, the lower the strength. In addition, the longer the steel is used at high temperature, the lower the strength. Therefore, if the steel works at high temperature for a long time, the instantaneous strength of the steel can not be used as its performance index, nor can the room temperature performance replace the high temperature performance.

The company celebrates Hong Kong-Zhuhai-Macao Bridge Opening. In October 23th, 2018, Chinese President Xi Jinping announced the opening of the Hong Kong-Zhuhai-Macao Bridge (HZMB) in Zhuhai, South China’s Guangdong Province. The HZMB is a 55-kilometre (34 mi) bridge–tunnel system consisting of a series of Q690C carbon steel plate sheet three cable-stayed bridges, an undersea tunnel, and four artificial islands. Hong Kong-Zhuhai-Macao Bridge is the world’s longest sea-crossing bridge connecting Hong Kong, Macao, and Zhuhai—three major cities on the Pearl River Delta.