keyword} plate ultrasonic testing

The steel plates for SA302GrC boilers must withstand different pressures and strengths due to the manufactured containers. Generally, the normal pressure is 314MPa or higher, and the working temperature is often between -20°C and 450°C. According to the working conditions and processing requirements of the vessel, the steel plate must have good cold bending and welding performance, good plasticity and toughness, and high temperature short-term strength or long-term strength performance.

Q345B structural steel plate, 09CuPCrNi-A corrosion-resistant steel plate belongs to ordinary low-alloy steel and steel for engineering structures; it is a high-strength corrosion-resistant steel plate. The combination of Cu and P can resist atmospheric corrosion. In addition, there are Cr and Ni, both of which are used in stainless steel. 09CuPCrNi-A corrosion-resistant steel plate is used to manufacture structural parts such as containers, railway vehicles, oil derricks, seaport buildings, oil production platforms, and containers containing hydrogen sulfide corrosive medium in chemical petroleum equipment.

As the thickness and hardness of Q345B structural steel plate increase, the tendency to crack at the cutting edge increases. In order to prevent the Q345B structural steel plate from cutting cracks, preheating should be carried out before Q345B structural steel plate cutting. Special attention should be paid to preheating to make the entire Q345B structural steel plate interface evenly heated to avoid local overheating in the area contacting the heat source. If the whole Q345B structural steel plate cannot be preheated, the partial preheating method can be used instead.

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