Comparison of material Q245R and Q345R steel plate

Q245Rand Q345R are two kinds of materials used in pressure vessels. For a long time, there have been many misunderstandings for the rational selection of these two materials, such as the excessive emphasis on Q245R in the calculation of container stiffness, the advantages of Q345R in the calculation of vessel strength, and the advantage of Q245R as the price of carbon steel. That's not the case.

Comparison of the chemical composition of steelQ245Rand Q345R：

Chemical composition (mass fraction)%
grade	C	Si	Mn	p	S	Ai
Q245R	<=0.20	<=0.35	0.50-1.00	<=0.025	<=0.015	<=0.020
Q345R	<=0.20	<=0.55	1.20-1.60	<=0.025	< =0.015	<=0.020

Except for silicon and manganese content,Q245Rand Q345R have the same limit of other elements. From the analysis of weldability of steel, the weldability of steel is very related to its chemical composition. The most important factor is carbon content. Because the carbon content in the steel increases, the plasticity decreases and the hardened tendency tends to increase, resulting in cracks easily. Ordinary steels contain many kinds of alloying elements. Their influence is comprehensive. Therefore, carbon equivalent is often used to estimate the weldability of steel. It is generally considered that the weldability of steel in Ceq<0.45% is better.

凯特alor is the supplier ofQ245Rand Q345R steel plate in China. and katalor own rich experience on supplying Q245R andQ345Rsteel. Welcome to contact katalor if you are looking for the best supplier of Q245R and Q345R steel plate.katalor would reply you at the first time when we see the information of Q245R and Q345R steel plate.

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