Steel Grade Comparison Table
China GB ：USA ASTM ：Germany DIN ：UK BS ：France NF
Q235A：A283M-A ：SS14,14,00 ：S235JR ：St37-2：E24-2
Q235B：A283M-B ：E24-2 ：St37-2 ：43B：AE235B
Q235C：A283M-C ：14,14,01 ：S235JO ：RSt37-2：E24-3
Q235D：A283M-D ：44,44,01 ：S235J2G3 ：St44-2 ：E28-2
Q255A：A283M-A ：GS-14,14,00 ：S275JR ：St44-2 ：E28-2
Q255B：S275JO ：RSt44-2 ：E28-3 ：BS1449 (1C) ：E36-2
Q2755C：S275J2G3 ：BS1449 (2C) ：St52-3 ：E36-3 ：NF A50-2
Q275D：S275J2G4 ：St52-3 ：E36-4 ：NF A35-501 ：E295
Q345A：A572M-A ：SM490A ：St44-3：E295 ：Fe490-2
Q345B：A572M-B ：15,15,00 ：SM490B ：St52-3 ：E509
Q345C：A572M-C ：Fe510C ：RSt50-2 ：E369-2 ：Fe490-2
Q345D：A572M-D ：Fe510D ：St52-3 ：E36-3 ：Fe510D
Q355A：16,16,00 ：SM490A ：St52-3 ：E36-3 ：Fe510C
Q355B：A572M-B ：SM490B ：RSt50-2 ：E369-2 ：Fe510C
Q355C：A572M-C ：SM490C ：Fe510D ：St52-3 ：E36-4
Q355D：A572M-D ：SM490YA ：RSt50-2 ：E36-4 ：Fe510D
Q420A：A572M-A ：SM490A ：St52-3 ：E36-3 ：Fe510C
Q420B：A572M-B ：SM490B ：RSt50-2 ：E36-3 ：Fe510C
Q420C：A572M-C ：SM490C ：Fe510D ：St52-3 ：E36-4
Q420D：A572M-D ：SM490YA ：RSt50-2 ：E36-4 ：Fe510D
Steel is an essential material in our everyday lives, ranging from cars to aircrafts, from simple tools to complex machines. Steel is composed of iron and other elements, and its properties depend on the elements which it contains. For that reason, different types of steel exist for different purposes, with some steels being incredibly strong and durable and others being very malleable and good for welding or forming.
Steel grades are established by internationally accepted standards and are used to determine the properties of steel products and the suitability of a steel for its intended purpose. There are many different steel grades available and each grade has different chemical and mechanical properties. This comparison table of steel grades provides a quick reference for common steel grades used in the construction industry and general engineering.
In China and most other countries, steel grades are universally agreed upon and produced in accordance with standards developed by the Chinese GB, USA ASTM, Germany DIN, UK BS and France NF. As can be seen from the comparison table, GB, ASTM, and DIN are the relevant standards commonly used in China.
When selecting a steel material grade, it is important to determine the suitability of the material for the application, its chemical and physical properties, as well as its strength and temperature requirements. It is also important to compare steel grades and look into the standard and specification of the steel product in question.
Finally, it is important to note that steel grades can be used as an indication of material properties and as a general guide but should not be taken as an absolute, nor should it be assumed that a particular grade of steel is suitable for any particular application without taking into account the full range of available materials. With the wide range of steel grades available in the market today, it is important to take into consideration the intended application and select the grade of steel that is most appropriate.
