Q370R steel plate - Knowledge

High strength boiler steel plate Q370R shall be done Normalized heat treatment normally when rolling. The ultrasonic examination is necessary for all pressure vessel steel plates.

GB713 Q370R Pressure Vessel and Boiler Steel Plate are used in Pressure Vessel, Boiler, Storage Tanks and Heat Exchanger in Oil, Gas Project.

GB713 Q370R steel Chemical composition:

Main chemical elements composition of Q370R
C	Si	Mn	P	S	Nb
0.18	0.55	1.20-1.60	0.025	0.015	0.015-0.050

GB713 Q370R steel Mechanical Property:

Thickness (mm)
Q370R	> 3 ≤ 16	> 16 ≤ 36	> 36 ≤ 60	>60 ≤ 100	>100 ≤ 150	>150
Yield strength (≥Mpa)	370	360	340	340	340	340
Tensile strength (Mpa)	530-630		520-620

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Q370R steel plate is a common pressure vessel steel plate. Its production process and workflow are as follows:

Raw Material Selection: High-quality carbon structural steel is selected as the raw material, and its chemical composition and mechanical properties are tested to ensure compliance with standard requirements.

Cutting and Pretreatment: The raw material is cut according to specified dimensions, and pretreated processes such as deburring and rust removal are carried out.

Hot Rolling: The pretreated steel plate is heated and rolled through a hot rolling mill to achieve the required thickness and width.

Pickling: The plate is immersed in an acidic solution to remove surface oxides and contaminants, ensuring surface smoothness.

Processing: Various processing operations, such as punching and bending, are performed as needed to meet specific shape and dimensional requirements.

Welding: The steel plate is welded, typically using arc welding or welding machines, and the welds must meet relevant standard requirements.

Heat Treatment: The welded steel plate undergoes heat treatment to eliminate welding stress, improve its microstructure, and enhance its mechanical properties.

Non-Destructive Testing: Non-destructive testing methods such as ultrasonic, radiographic, or magnetic particle inspection are conducted to detect potential flaws and defects.

Final Inspection and Finishing: Final inspection is performed according to customer requirements, and the steel plate is checked and cleaned to ensure quality meets standards.

Packaging and Delivery: Qualified steel plates are packaged and labeled, ready for delivery to customers.

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