GB/T700 Q235B carbon steel is the most common used among carbon steel.It is equal to steel grades ASTM A36,JIS G3101 SS400,EN 10025-2 S235JR.carbon steel Q235B in coils shape and plate shape at port warehouses with many sizes.
A36 steel plate is similar to Q235B steel plate, it is one Q235b equivalent steel standard, another one is SS400. While the difference between A36 and Q235B is as follows:
Different Yield Point (A36=250MPa, Q235B=235MPa);
Different Tensile Strength (A36=400-550MPa, Q235B=375-500MPa);
Different element content requirements: (A36: C is equal to or less than 0.25%, Si is less than or equal to 0.4%, P < 0.04%, s is less than or equal to 0.05%; Q235B:C=0.12-0.2%, Si is less than or equal to 0.3, P < 0.045%, s is equal to or less than 0.045%).Q235 manganese content of the requirements (Mn=0.30-0.70%) A36 manganese content is not required.
GB/T700 Q235B steel plate Technical Requirements & Additional Services:
Low temperature impacting test
Cutting and welding as per end user’s demands
More striction on some chemical elements contains
Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
Ultrasonic test under GB/T2970,JB4730,EN 10160,ASTM A435,A577,A578
Mechnical property for Q235B Carbon steel:
Thickness (mm) |
|
Q235B |
≤ 16 |
> 16 ≤ 40 |
> 40 ≤ 60 |
> 60 ≤ 100 |
> 100 ≤ 150 |
> 150 |
|
Yield strength (≥Mpa) |
235 |
225 |
215 |
215 |
195 |
185 |
|
Tensile strength (Mpa) |
370-500 |
Chemical composition for Q235B Carbon steel (Heat Analysis Max%):
P
S
0.045
0.045
Main chemical elements composition of Q235B |
|
C |
Si |
Mn |
|
0.20 |
0.35 |
1.40 |
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