Steel Plate for High-level Building

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Product
Code
Dimension
Application
T(mm)
W(m)
L(m)
 
Q235GJ
B
12--80
1.5-3.5
 
 
 
C
12--80
 
 
D
12--80
Applied in high-level
Building structure and other large Building structures;
Used as building support and Load-bearing beams in manufacture
Industrial.

 
E
12--80
 
Q345GJ
B
12--80
1.5-3.5
 
 
C
12--80
  Steel plate for
high-level
Building
 
D
12--80
E
12--80
Q390GJ
B
12--80
1.5-3.5
 
C
12--80
D
12--80
E
12--80
 
Q420GJ
B
12--80
1.5-3.5
 
 
C
12--80
 
D
12--80
 
E
12--80
 
Q420GJ
B
12--80
1.5-3.5
 
 
 
C
12--80
 
 
 
D
12--80
 
 
 
E
12--80
 
 
 
  1.1 Code and application:
          
Product
Code
The meaning of Code
Standard
Application
High-strength low-alloy steel
Q390
Q- initial letter of the pronunciation(Qu fu dian) of chinese words,Meaning Yield point in English
pronunciation(qiao) of chinese words, meaning bridge.AH- standards for High-strength produced by Anyang Steel Group;60,70- standards for Tensile Strength
GB/T1591-94
Used in engineering machinery, steel structures, bridges and construction industries, with good strength, toughness and welding properties.Applied in machinery equipments and structure parts like factory building machinery, general construction machinery, Rigs, power shovel, electric wheel anti-Doo, excavators, loading
Machines, bulldozers
 
Q420
Q460
AH60
 
 
Other standards negotiated
 
AH70DB
 
 
 
1.2 Technical requests:                                                 
Code
Quality grade
T
mm
Chemical Composition%
C
Si
Mn
P≤
S≤
Nb
Ti
Cr≤
Cu≤
V≤
Ni≤
Alt≥
Q235GJ
B
8--80
≤0.20
≤0.35
 
0.025
0.015
 
 
0.3
0.3
 
0.3
0.015
C
≤0.18
0.60-
 
 
 
D
≤0.20
1.2
0.02
 
 
 
E
≤0.18
 
 
 
 
Q345GJ
B
8--80
≤0.20
≤0.55
≤1.60
0.025
0.015
 
 
0.3
0.3
 
0.3
0.015
C
≤0.18
0.015
0.01
0.02
D
≤0.20
0.02
-0.06
-0.03
-0.15
E
≤0.18
 
 
 
Q390GJ
C
8--80
≤0.20
≤0.55
≤1.60
0.025
0.015
0.015
0.01
0.3
0.3
0.02
0.7
0.015
D
≤0.18
0.02
-0.06
-0.03
-0.2
E
 
 
 
Q420GJ
C
8--80
≤0.20
≤0.55
≤1.60
0.025
0.015
0.015
0.01
0.4
0.3
0.02
0.7
0.015
D
≤0.18
0.02
-0.06
-0.03
-0.2
E
 
 
 
Q460GJ
C
8--80
≤0.20
≤0.55
≤1.60
0.025
0.015
0.015
0.01
0.7
0.3
0.02
0.7
0.015
D
≤0.18
0.02
-0.06
-0.03
-0.2
E
 
 
 
1.3 Request for C content:
Marked in the quality certificate, used to calculate carbon content or the chemical composition of welding crack sensitivity index. The carbon content and welding crack sensitivity index of different codes and all grade steel plates should be consistent with the provisions of the following table. To calculate the carbon content and welding crack sensitivity index with Melting analysis value and according to calculating formula (1) or (2).  Generally, deliver as per carbon content, otherwise beforehand agreement.
 
    CE(%)=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15                                   (1)
   Pcm(%)=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B                   (2)
 
Code
Delivery status
 
Ceq
Welding crack sensitivity index
Pcm
≤50mm
>50-100mm
≤50mm
>50-100mm
Q235GJ
Hot-rolled, controlled rolling
 
≤0.36
≤0.36
≤0.26
Q345GJ
Hot-rolled, controlled rolling
≤0.42
≤0.44
≤0.29
TCMP
≤0.38
≤0.40
≤0.24
≤0.26
 
 
 
 
 
1.4 Mechanical Properties:
Code
Quality
Grade
T(mm)
Yield Point
Mpa
Tensile Strength
Mpa
 Elongation
%
V-impact power (vertical)
 
180℃ Bending test
Thickness
mm
Yield Ratio
≤
temperature℃
J
R
≤16
>16
Q235GJ
B
8--80
235
400--510
23
20
34
d=2a
d=3a
0.8
C
8--80
235
0
D
8--80
225
-20
E
8--80
215
-40
Q345GJ
B
8--80
345
490--610
22
20
34
d=2a
d=3a
0.83
C
8--80
345
0
D
8--80
335
-20
E
8--80
325
-40
Q370GJ
B
8--80
390
490--650
20
20
34
d=2a
d=3a
0.85
C
8--80
390
0
D
8--80
380
-20
E
8--80
370
-40
Q420GJ
B
8--80
420
520--680
19
20
34
d=2a
d=3a
0.85
C
8--80
420
0
D
8--80
410
-20
E
8--80
400
-40
Q460GJ
B
8--80
460
550--720
17
20
34
d=2a
d=3a
0.85
C
8--80
460
0
D
8--80
450
-20
E
8--80
440
-40