The Difference between Railway Track Material U71Mn and Q345B

U71Mn and Q345B are often indistinguishable for people who have just come into contact with the steel industry. Next, let's learn about the characteristics and differences of these two railway track materials.

Q345B is a kind of alloy steel, which is mainly applied to plates and contains no more than 0.2% carbon, so it is relatively soft and its yield strength is about 345.

U71Mn, which is currently used on a large scale in the railway industry, is made of high carbon steel with a carbon content of about 0.7% and good toughness, plasticity, strength and hardness. It is especially suitable for lines with light axle weight and less traffic.

Therefore, when we select rails, you can't compare the quality of railway track materials (except for toughness indexes such as elongation rate, the other indexes such as hardness and strength are U71Mn is better), after all, the application scope is not very same. As a railway track, U71Mn is given priority, after all, this is laid in large area.  Q345B has the disadvantages of being too soft and not wear-resistant.

Finally, there is the issue of cost.  From the perspective of train tracks, U71Mn is recommended. In addition, the choice of rail size also needs to be paid attention to, the rail type with too large a size is expensive, and the rail type suitable for the operation condition of the line needs to be selected, i.e. economical and applicable.

After reading this article, do you have a clear understanding of U71Mn and Q345B railway track materials? Zongxiang steel group has been dedicated to the sales and processing of rail for more than 20 years, and has strictly controlled the quality. After the products are put on the market, they are highly praised by customers. If you have any requirement for rail, please contact us or leave us a message. We believe that with your advice and help, we will do better.

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