What does Q345qE steel stands for?

The grade of bridge steel is composed of 4 parts: Chinese spelling letters representing yield point, yield point value, Chinese Pinyin letters of bridge steel, and quality grade symbol. For example: Q345qE, where:

Q——The first letter of the Chinese spelling of the character "Qu" of the steel yield point of the bridge;

345——Yield point value, unit MPa;

q——The first letter of the pinyin of "bridge" in bridge steel

E——The quality grade is E grade.

Smelting method: Steel is smelted by converter or electric furnace.

Q345qE steel plates delivery status: The plate is delivered in hot rolled, controlled rolling or normalized state.

Q345qE steel plates application

Q345qE bridge steel plate is a thick steel plate specially used for manufacturing bridge structural parts. Q345qE steel plate for sea-crossing bridge. It is required to have high strength, toughness and withstand the load and impact of locomotives, and have good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance. The steel for bolted bridges should also have good welding performance and low notch sensitivity.

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