Name: China What Is The Difference Between P355GH And Q345R Pressure Vessel Steel? Manufacturers Suppliers Factory - Gnee Steel
Brand: GNEE
SKU: 245142365

What Is The Difference Between P355GH And Q345R Pressure Vessel Steel?

Both P355GH and Q345R are steel plates for pressure vessels. The yield strength of Q345R is 345MPa, while the yield strength of P355GH steel plates is generally 355MPa. The tensile strength of P355GH and Q345R pressure vessel steel is between 510 and 650MPa. P355GH and Q345R pressure vessel steel are widely used in the manufacture of pressure vessels, boilers, storage tanks, and other equipment in the petroleum, chemical, power, pharmaceutical, and other industries.

What is the difference between P355GH and Q345R pressure vessel steel?

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P355GH steel plate is a high-temperature pressure vessel steel that complies with European standard EN10028-2. P355GH boiler steel has good tensile and bending properties, maintaining good strength and ductility even at lower temperatures.

P355GH steel plate also has good processing properties, making it easy to perform cold and hot processing, meeting various complex shape and size requirements. Its excellent welding performance ensures the airtightness and safety of pressure vessels. In high temperature environments, P355GH still maintains good strength and stability, able to withstand the dual challenges of high temperature and high pressure.

The chemical composition of P355GH pressure vessel steel is mainly composed of elements such as carbon, silicon, manganese, phosphorus, sulfur, chromium and molybdenum, which further enhances its corrosion resistance.

Q345R steel plate is a low-alloy steel used in boilers and pressure vessels. The Q345R pressure vessel steel plate complies with the national standard GB/T713-2014. The Q345R pressure vessel steel is designed with low alloy composition, and has high yield strength and tensile strength, which can meet the bearing requirements of different engineering fields. In low temperature environments, the Q345R pressure vessel steel plate also exhibits good toughness. After specific corrosion resistance treatment, it also has good corrosion resistance and is suitable for boiler vessels in corrosive environments.

The Q345R steel plate also exhibits good fatigue resistance and is suitable for boiler vessels that need to withstand cyclic loads. Its chemical composition mainly consists of carbon, silicon, manganese, phosphorus, sulfur and other elements.

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Chemical Composition of EN 10028 – P355GH


C	0.10 to 0.22
Si	≤0.60
Mn	0.10 to 1.70
P	0.025
S	0.015
Al	≤0.020
N	≤0.012
Cr	≤0.30
Cu	≤0.30
Mo	≤0.08
Nb	≤0.020
Ni	≤0.30
Ti	0.03
Vi	≤0.02

Chemical Composition of Q345R Plate

C	Si	Mn	P	S	Al
0.20 max.	0.55 max.	1.20-1.60	0.025 max.	0.015 max.	≥0.020

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