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Q345R and Q235R steel differences

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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