There are two types of heat treatment deformation of Q355NH weathering steel plate

Q355NH weathering steel plate must undergo a quenching process in the manufacturing process. Sometimes, due to poor workmanship, Q355NH weathering steel is often deformed due to too high and too low heat.

There are two types of heat treatment deformation of Q355NH weathering steel plate: one is the change of size, and the other is the change of part geometry. Different heat treatment processes have different deformation and anti-deformation methods for the size and geometry of Q355NH weathering steel plate products.

Generally speaking, Q355NH weathering steel plate shrinks martensite during low temperature tempering, and its shrinkage is proportional to the supersaturated carbon content. When heated at room temperature -200, some of the retained austenite will transform into martensite and expand.