Technical Parameter
Q245R and Q345R are excellent carbon steel plates for pressure vessels. The choice of them mainly depends on the specific application scenario and requirements. In the manufacture of pressure vessels, the appropriate steel plate material should be selected according to the design pressure of the vessel, working temperature, medium characteristics and other factors.
Performance Comparison of Q245R/Q345R Carbon Steel Plate
1.Performance of Q245R
(1) Chemical composition: The chemical composition of Q245R mainly includes C (≤0.20%), Si (≤0.35%), Mn (0.50% ~ 1.00%), P (≤0.025%) and S (≤0.010%) and other elements.
(2) Mechanical properties: The tensile strength and yield strength of Q245R vary with the thickness of the steel plate. Generally, the tensile strength of the steel plate with a thickness of 3 ~ 16mm is 400 ~ 520MPa. The yield strength is ≥245MPa, and the elongation is ≥25%.
(3) Weldability: Q245R has good weldability and low carbon equivalent (Ceq=0.37%). It is suitable for use in wet H2S stress corrosion environment.
(4) Corrosion resistance: Q245R after special smelting and rolling process treatment, showing good corrosion resistance, can run stably in harsh working environment for a long time.
2.Performance of Q345R
(1) Chemical composition: The chemical composition of Q345R mainly includes C (≤0.20%), Si (≤0.55%), Mn (1.20% ~ 1.70%), P (≤0.025%) and S (≤0.010%) and other elements.
(2) Mechanical properties: The yield strength of Q345R varies according to thickness. For example, when ≤16mm, the yield strength is ≥345MPa, the tensile strength is between 470 and 640MPa, and the elongation is ≥21%. The steel plate has good impact toughness and high temperature mechanical properties.
(3) Weldability: Q345R has a higher carbon equivalent (Ceq=0.47%), is more likely to crack during welding, notch sensitivity is larger, fatigue strength is lower, and weldability is not as good as Q245R in some cases.
(4) Corrosion resistance: Q345R also has some corrosion resistance, but in some specific corrosive environments, its performance may not be as good as Q245R.
Future Development Trend of Q245R/Q345R Carbon Steel Plate
1. Market demand trend
Infrastructure construction needs: With the continuous advancement of infrastructure construction around the world, such as highways, high-speed railways, Bridges, urban rail transit, etc., the demand for steel will continue to grow. As high-quality steel materials, Q235R and Q245R have a wide range of application prospects in the field of infrastructure construction.
Industrial demand: In the petrochemical, machinery manufacturing, shipbuilding and other industrial fields, Q235R and Q245R are favored for their excellent physical and chemical properties. As these industries continue to develop, the demand for these two types of steel will also continue to increase.
Demand for emerging fields: With the rapid development of emerging industries such as new energy vehicles and high-end equipment manufacturing, the demand for high-performance and high-quality steel is also increasing. The Q235R and Q245R are expected to find new growth points in these emerging areas.
2. Technological innovation and industrial upgrading
Technological innovation: We need to increase investment in technological innovation and develop steel products with higher performance and higher added value.
Industrial upgrading: In the face of increasingly fierce market competition and environmental protection requirements, IBC Group needs to accelerate the pace of industrial upgrading. By integrating resources, optimizing structure, improving production efficiency and market competitiveness, we can adapt to future market changes.
3. Environmental protection and sustainable development
Environmental requirements: With the continuous improvement of global environmental awareness, the steel industry is facing more and more stringent environmental requirements. The production of Q235R and Q245R needs to strengthen environmental protection investment. And it also needs to promote green production technology, and reduce energy consumption and pollution emissions.
Sustainable development: Enterprises need to actively implement the concept of sustainable development, through recycling resources, reducing energy consumption and pollution emissions and other measures to achieve a win-win economic and social benefits.
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