What is a Pressure Vessel Steel Plates

Pressure vessel steel plate is a large category of steel plate, with special composition and performance, mainly used for pressure vessel use, for use, temperature, corrosion resistance, the pressure vessel steel plate material should be selected, is not the same.

Heat treatment: hot rolling, controlled tying, normalizing, normalizing + tempering, tempering + quenching (tempering)

Such as: 20 r, 16 MNR, 15 crmor, 09 mnnidr, 12 cr2mo1r, 16 MNR (HTC), 20 r (HTC) classification, and so on.

The above are Chinese brands, and there are many foreign brands. Such as: SA516Gr60,SA516Gr70 and so on.

Delivery status description of pressure vessel steel plate Q345R

Common delivery status has the following points:

Quenching: The process of rapid cooling after heating to the temperature above the phase change point. Increase the hardness of the material, but reduce the toughness.

Normalizing: After heating above the phase change temperature, normal cooling (in the air).

Annealing: After heating to the temperature above the phase change point, slow cooling. Eliminate quenching effects, stress relief, uniform composition.

Tempering: After quenching, it is reheated to a certain temperature (below the quenching temperature), kept warm, and then cooled. Uniform composition, slightly reduce hardness, greatly improve toughness.

Generally speaking: first to annealing, normalizing; Eliminate the effect of the original heat treatment. Then quench, then temper.