What is the Q420R steel?

Q420R steel plate is a new grade that was included in the GB713-2014 standard in 2015. Q420R delivery status is normalized, and its thickness range is between 10-30mm. Due to the high strength and excellent weldability of Q420R steel plate, Q420R boiler steel is widely used in large ships, bridges, power station equipment, medium and high pressure boilers, high pressure vessels, rolling stock, overweight machinery, mining machinery, and other large welded structural parts.

Q420R steel has high strength, good fatigue resistance; high toughness and low brittle transition temperature; good cold forming performance and welding performance; good corrosion resistance and certain wear resistance. High strength, especially in normalizing or normalizing and tempering state, it has high comprehensive mechanical properties.

Specification range
The Q420R steel plate has a width of 1600-4020, a thickness of 8-100mm, and a thickness of 3000-27000mm.

Q420R steel surface quality
Cracks, bubbles, scars, folds and inclusions on the surface of the steel plate are not allowed to be harmful to use.

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