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You are here: Home » News » What is the difference between the material of Q235A and Q235B?

What is the difference between the material of Q235A and Q235B?

Views:78     Author:Site Editor     Publish Time: 2018-09-07      Origin:Site

Carbon structural steel is the most widely used and the largest number of steel. Normally rolled steel, profiles and profiles, generally do not need to be directly used by heat treatment, mainly used in general structure and engineering. Today raymond steel tube company will introduce the difference between the material of Q235A and Q235B.


Q195, Q215, Q235, Q255 and Q275 respectively represent the grades of steel. The grades of steel are composed of the letters (Q) representing the yield points, the values of yield points, the symbols of quality and quality (A, B, C, D) for deoxidization methods. In terms of chemical composition, the plasticity of low carbon steel grades Q195, Q215, Q235, Q255 and Q275 is more stable with higher carbon and manganese content. According to the mechanical properties, the above brands indicate the yield point of steel whose thickness is less than 16mm. The tensile strength was 315-430, 335-450, 375-500, 410-550, 490-630 (obN/mm2), and the elongation was 33, 31, 26, 24 and 20 (0.5%) respectively. Therefore, when introducing steel to customers, customers should be reminded to choose different materials according to the material of the product, so as not to affect product quality.


What is the difference between the material of Q235A and Q235B?


Q235A and Q235B steels belong to carbon steel. In the national standard GB700-88, the material of Q235A and Q235B is mainly distinguished in terms of carbon content of steel. The material of Q235A has carbon content between 0.14-0.22%; the material of Q235B does not do impact test, but does impact test at room temperature, V-notch. Relatively speaking, the mechanical properties of steel material Q235B are far superior to those of Q235A steel. In general, the steel factory signs the logo on the finished products before they are finished. The user can identify whether the material is Q235A, Q235B or other material on the identification board.


Raymond steel tube company usually produces seamless precision steel tube of 10#, 20#, 45#, 16mn, 30CrMo etc. The steel pipes we produce are mainly used for shock absorbers of automobiles and motorcycles, pneumatic reed pipes and so on. The monthly shipment volume is about 50 tons. We also have ISO9001 certification. We can rest assured of our quality. If you have the demand for cold drawn precision seamless pipe, you can contact us by mail or whatsapp on website.


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