Chinese Grades for Flat Bar
Flat Bar
Quality: Q235B, Q345B, SS400, S275JR, S235JR, ASTM A36
Chemical Composition & Mechanical Properties refer to the table
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Chemical Composition %
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Mechanical Properties
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Steel Brand
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C
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Si
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Mn
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P
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S
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Elongation %
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Yield Strength Mpa
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Tensile Strength Mpa
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Q235B
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0.12-0.20
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<=0.30
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0.30-0.70
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<=0.045
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<=0.045
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>=25
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>=235
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375-500
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|
Q345B
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<=0.20
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<=0.55
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1.00-1.60
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<=0.040
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<=0.040
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>=21
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>=345
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470-630
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|
SS400
|
/
|
/
|
/
|
<=0.050 |
<=0.050
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>=21
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>=245
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>=400
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|
S275JR
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<=0.21
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/
|
<=1.5
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<=0.035
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<=0.035
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/
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>=275
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380-540
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|
S235JR
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<=0.20
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/
|
/
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<=0.045
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<=0.045
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/
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>=235
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290-510
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