What does automobile structure steel S 355 MC stand for?

We have a very automobile structure steel S 355 MC extensive commodity information network, with partners all over the world, and have become the full authority of many European and American traders in China. Under the guidance of the business philosophy

We have a very automobile structure steel S 355 MC extensive commodity information network, with partners all over the world, and have become the full authority of many European and American traders in China. Under the guidance of the business philosophy of "creating the best service" and through the unremitting efforts of all employees, we have achieved remarkable results.

The company's main steel plates have twelve types of steel products like boilers and pressure vessels, low-alloy high-strength steel automobile structure steel S 355 MC, wear-resistant steel plates, corrosion-resistant steel plates, high-rise building structural steel plates, marine structural steel plates, alloy structural steel plates, mold steel plates, carbon structural steel plates, shipbuilding and steel plates for oil production platforms, composite steel plates, steel plates for oil and gas pipelines. We offer various steel grades, and more than 300 kinds of thickness specifications.

Boiler steel refers to the special steel used to manufacture pressure components of steam boilers, such as steam drums. The boiler steel mainly means boiler steel plates and seamless boiler steel pipes. Boiler components not only bear pressure loads but are also heated by direct fire, so the requirements on the chemical composition and mechanical properties of boiler steel, automobile structure steel S 355 MC are strict. In the chemical composition of boiler steel, automobile structure steel S 355 MC, sulfur and phosphorus are strictly controlled. Tensile strength, yield point, elongation, impact energy value and 180 ° cold bending are required to be tested in boiler steel mechanical properties. In addition, strain aging impact test is also required for boiler steel. The quality control of boiler steel is slightly higher than that of pressure vessel steel.

With the increase of temperature, the yield limit of automobile structure steel S 355 MC will decrease monotonically, but the tensile strength of automobile structure steel S 355 MC will rise to a high peak value at a certain temperature, and then decrease. This peak temperature is called the blue brittleness temperature of automobile structure steel S 355 MC. Near the blue brittleness temperature, the automobile structure steel S 355 MC strength increases and the plasticity decreases. The elongation and section shrinkage of automobile structure steel S 355 MC increase with the increase of temperature, but there is a low peak at the blue brittleness temperature. The blue brittleness temperature of low carbon steel ranges from 200 ℃ to 250 ℃. The blue brittleness of low alloy steel is not obvious as that of low carbon steel, and the blue brittleness temperature is higher.

What is the difference between Q345B steel and Q345A steel?
automobile structure steel S 355 MC, Q345B steel and Q345A steel have slight difference in chemical composition:
Q345A steel: C ≤ 0.20, Mn ≤ 1.7, Si ≤ 0.55, P ≤ 0.045, S ≤ 0.045, V 0.02 ~ 0.15;
Q345B steel: C ≤ 0.20, Mn ≤ 1.7, Si ≤ 0.55, P ≤ 0.040, S ≤ 0.040, V 0.02 ~ 0.15.
The difference between Q345B steel and Q345A steel is mainly in A and B behind the steel grade, Q345A steel grade is not subject to impact; Q345B steel grade needs 20 ℃ room temperature impact test.

If you want to get the ASTM A573 Grade 70/A573 Gr.70 carbon manganese silicon steel plates steel price, please do not hesitate to contact us. Any need in automobile structure steel S 355 MC ASTM A573 Grade 70/A573 Gr.70 carbon manganese silicon steel plates Chemical Composition and Mechanical Properties, please feel free to contact us by email or calling to us

The company has a professional after-sales service team and good after-sales service reputation, providing full and uninterrupted after-sales service, to ensure timely and rapid solution to customer problems. The company is recognized as a 5-star brand of market quality cost performance and customer satisfaction by Market Research Center, and rated as "AAA credit enterprise of enterprise credit evaluation", and also a leading steel producer and service provider in the world.