Q370R Pressure Vessel Steel Plate

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional q370r pressure vessel steel plate manufacturers and suppliers in China. Welcome to wholesale customized q370r pressure vessel steel plate at competitive price from our factory. Good service and quality products are available.

 

Q370R is a specific grade of steel plate used in the manufacturing of boilers and pressure vessels. It is characterized by its high strength, toughness, and weldability, making it suitable for applications involving high pressure and temperature. The steel is often normalized during production and undergoes ultrasonic examination to ensure quality.

Q370R steel plate belongs to boiler and pressure vessel plate.
Executive standard: GB713.
"Q" stands for yield strength, "370" stands for yield value (MPa), and R stands for vessel steel.
The old standard grade is 15MnNbR.

 

 

Grade	C%	SI%	Mn%	Cr%	Ni%	Mo%	Nb%	V%	P%	S%	Alt%
Q370R	≤O.18	≤0.55	1.20-1.60				0.015-0.050		≤0.025	≤0.015

 

 

Steel Grade	Thickness, in mm	Tensile Strength	Yield Strength, min	Elongation, %, min
Q370R	10<T≤16	530-630	370	20
	16<T≤36		360
	36<T≤60	520-620	340

Petrochemical Industry: In hydrogenation reactors, Q370R steel plates withstand a hydrogen pressure of 20MPa and a high temperature of 350°C. Their hydrogen corrosion resistance is 30% higher than that of 16MnR, and the service life of the equipment is extended to more than 15 years.

Nuclear Energy Field: The reactor pressure vessels of nuclear power plants adopt this material. Under the working conditions of 300°C and 15.5MPa, after 100,000 hours of service verification, the creep rupture strength retention rate is >90%, and it has excellent radiation swelling resistance.

Power Industry: Q370R steel plates are used in the drum of power plant boilers. At a high temperature of 540°C, the long-term strength reaches 220MPa, which is twice that of Q245R steel plates, meeting the requirements of supercritical units.

Heavy Machinery: This material is used for pressure-bearing components of large presses and hydraulic equipment. Under dynamic loads, the fatigue life is increased by 50%, and the impact resistance meets the requirements of API 620 standards.

 

 

Advantages

Higher strength than Q345R, with excellent cost performance, suitable for replacing imported materials.

Grain refinement through microalloying (Nb/V/Ti) to improve low-temperature toughness.

 

Latest Trends

Green smelting: Reducing carbon equivalent (Ceq) and enhancing welding environmental friendliness.

Intelligent inspection: Adopting AI-assisted ultrasonic testing (UT) to improve defect recognition rate.

 

Material Selection Recommendations

Q370R is preferred for medium-high pressure, low-temperature, or dynamic load working conditions, but strict compliance with welding procedure qualification is required.

For higher parameters (such as ＞400℃), it can be upgraded to 18MnMoNbR or 13MnNiMoR.

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The GB713 Q370R Pressure Vessel And Boiler Steel Plate is the important material in the material engineers. And the GB713 Q370R Pressure Vessel And Boiler Steel Plate is mainly used to fabrication of boilers and pressure vessel GNEE will provide the high quality the GB713 Q370R Pressure Vessel And Boiler Steel Plate for you. GNEE has exported our the GB713 Q370R Pressure Vessel And Boiler Steel Plate to the customers from USA, South America, Europe, Africa etc.

If you want to learn more about GNEE's products, you can send an email to info@gneesteels.com. We are more than happy to assist you.

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