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FAQ: what is the difference between Q345A, Q345B,Q345C,Q345D?

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FAQ: what is the difference between Q345A, Q345B,Q345C,Q345D?
Question: what is the difference between Q345A, Q345B,Q345C,Q345D?
 
Answer: Their differences can be found in mechanical properties and chemical composition. 
 
Mechanical Properties:
Steel
W.T(mm)
Elongation≥(%)
Yield (MPa≥)
Temperature℃
Q345A
≤16
21
345
/
Q345B
≤16
21
345
20
Q345C
16-35
22
325
0
Q345D
≤16
21
345
-20
16—40
21
335
-20

 

Chemical Composition:
Steel
C
Si
Mn
P
S
Q345A
≤0.20
≤0.55
1.00-1.60
≤0.045
≤0.045
Q345B
≤0.20
≤0.55
1.00-1.60
≤0.040
≤0.040
Q345C
≤0.20
≤0.55
1.00-1.60
≤0.035
≤0.035
Q345D
≤0.18
≤0.50
≤1.70
≤0.030
≤0.025

customer usually choose the steel materials as per the exact application such as buidling, construction, machinery, airport, oil and gas transmission, electricity etc. And price is different. 

 
Pub Time : 2015-03-17 09:19:38 >> News list
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Hebei Borun Steel Trade CO.,LTD

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