Q345R and Q235R steel differences
Boiler steel, also called pressure vessel steel, is designed to manufacturing steam boilers, pressure vessels and other pressure vessel structures. Because this kind of material bears certain air pressure and water pressure, as well as used in environments of different temperature, like high, medium, low temperature, the requirement for this kind of steel Q345R and Q235R plate is more strict.
Q345r & Q245R steel plate chemical composition:
Material Grade |
C |
Si |
Si |
P |
S |
S |
|
Q245R |
≤0.20 |
≤0.40 |
≤0.40 |
≤0.025 |
0.015 |
0.015 |
|
Q345R |
≦0.20 |
≦0.55 |
≦0.55 |
≦0.025 |
≦0.015 |
≦0.015 |
Q345R steel and Q245r steel plate mechanical properties
Material Grade |
Thickness |
Yield strength |
Tensile Strength |
Elongation |
Impact test |
|
Q245R |
≤16 |
>245 |
400-520 |
≧25 |
>34 |
|
16≦36 |
>235 |
||||
|
36≦60 |
>225 |
||||
|
63≦100 |
>205 |
390-510 |
≧24 |
||
|
80≦150 |
>185 |
380-500 |
|
||
|
Q345R |
≤16 |
>345 |
510-640 |
≧21 |
>34 |
|
16≦36 |
>325 |
500-630 |
≧21 |
||
|
40≦60 |
>315 |
490-620 |
≧21 |
||
|
63≦100 |
>305 |
490-620 |
≧20 |
||
|
80≦150 |
>285 |
480-610 |
≧20 |
||
|
100≦200 |
>265 |
470-600 |
≧20 |
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