ASTM A53 AND Q235 FOR STEEL PIPES

[ASTM A53] is a steel grade produced in accordance with American ASTM standards, belonging to American standards. 

A53-f corresponds to domestic Q235 steel, a53-a corresponds to domestic 10.

[Q235] ordinary carbon structural steel, also known as A3 steel. 

Q represents the yield limit of this material, and the following 235 refers to the yield value of this material, which is about 235mpa.

The yield value will decrease with the increase of the thickness of the material. 

Due to the moderate carbon content, the comprehensive properties are good, and the strength, plasticity and welding properties are well matched, so it is most widely used.