Can Q235B replace ASTM A36 steel plate?

ASTM A36 steel is similar to Q235B steel, but the differences between A36 and Q235B are as follows:

1. The yield point is different (A36=250MPa, Q235B=235MPa)

2. Different tensile strength (A36=400-550MPa, Q235B=375-500MPa);

3. Different requirements for the content of elements: (A36: C≤0.25%, Si≤0.4%, P≤0.04%, S≤0.05%; Q235B: C=0.12- 0.2%, Si≤0.3, P≤0.045%, S≤0.045%).

Q235 has requirements for manganese content Mn=0.30-0.70% A36 has no requirements for manganese content.

Q235B and ASTM A36 Standard

A36 is the material of American standard ASME standard (equivalent to ASTM specification), SS400 is the material of Japanese standard JIS G3101 (rolled steel for general structure), and Q235 is the material of national standard GB700 standard.

Although the mechanical properties of Q235 material are worse than that of A36 material, in the actual operation process, as long as the owner does not clearly request, often the three materials can be substituted for each other.

ASTM A36 Steel Application

ASTM A36 steel plate is a general steel plate and profile, which is widely used in brackets, feet and other structures. It is suitable for riveting, bolting and welding structures for bridges and buildings, as well as general-purpose structural steel quality carbon steel sections, steel plates and bar steel.