The main Grades: Q345GJB/C/D/E-Z15/Z25/Z35,Q390GJC/Q390GJD/E-Z15/Z25/Z35, Q420GJC/D/E-Z15/Z25/Z35, Q460GJB/C/D/E-Z15/Z35, A572Gr42/50/65, 201,201,304,316,430,Thickness: 6-200mm, The high rise building steel has the characteristics of high strength, high toughness, easy welding(low yield strength ratio) and high lamellar tearing resistance, etc.
Widely used in large construction projects, such as high-rise building, super high-rise building, large-span stadiums, airports, conference and exhibition centers, and steel structure factory buildings etc.
Typical Steel Grades/Specifications
|
Grades |
Specifications |
Size Range |
Delivery Condition |
|
Q345GJB/C/D/E-Z15/Z25/Z35 |
GB/T 19879 |
6-200 |
AR/NR/N/N+T/TMCP |
|
Q390GJC/D/E-Z15/Z25/Z35 |
|||
|
Q420GJC/D/E-Z15/25/35 |
AR/NR/N/N+T/Q+T/TMCP |
Properties Of Typical Grades
Chemical Composition
|
Steel |
Grades |
Chemical Composition (wt%) |
|||||||||||
|
C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
Als |
Cr |
Cu |
Ni |
||
|
Q345GJ |
B |
≤0.20 |
≤0.55 |
≤1.60 |
≤0.015 |
≤0.005 |
0.02-0.15 |
0.015-0.06 |
0.010-0.030 |
≥0.015 |
≤0.30 |
≤0.30 |
≤0.30 |
|
C |
|||||||||||||
|
D |
≤0.18 |
≤0.55 |
≤1.60 |
≤0.015 |
≤0.005 |
0.02-0.15 |
0.015-0.06 |
0.010-0.030 |
≥0.015 |
≤0.30 |
≤0.30 |
≤0.30 |
|
|
E |
|||||||||||||
|
Q390GJ |
C |
≤0.20 |
≤0.55 |
≤1.60 |
≤0.015 |
≤0.005 |
0.02-0.20 |
0.015-0.06 |
0.010-0.030 |
≥0.015 |
≤0.30 |
≤0.30 |
≤0.70 |
|
D |
≤0.18 |
≤0.55 |
≤1.60 |
≤0.015 |
≤0.005 |
0.02-0.20 |
0.015-0.06 |
0.010-0.030 |
≥0.015 |
≤0.30 |
≤0.30 |
≤0.70 |
|
|
E |
|||||||||||||
|
Q420GJ |
C |
≤0.20 |
≤0.55 |
≤1.60 |
≤0.015 |
≤0.005 |
0.02-0.20 |
0.015-0.06 |
0.010-0.030 |
≥0.015 |
≤0.40 |
≤0.30 |
≤0.70 |
|
D |
≤0.18 |
||||||||||||
|
E |
|||||||||||||
|
Q460GJ |
C |
≤0.20 |
≤0.55 |
≤1.60 |
≤0.016 |
≤0.005 |
0.02-0.21 |
0.015-0.06 |
0.010-0.030 |
≥0.015 |
≤0.70 |
≤0.30 |
≤0.70 |
|
D |
≤0.18 |
0.015-0.060 |
≥0.20 |
||||||||||
|
E |
|||||||||||||
|
|
S Content (wt%) |
Area Reduction Z(%) |
|
|
Average Value Of Three Samples |
Value Of Single Sample |
||
|
Z15 |
≤0.005 |
≥15 |
≥10 |
|
Z25 |
≤0.005 |
≥25 |
≥15 |
|
Z35 |
≤0.005 |
≥35 |
≥25 |
|
|
Delivery Condition |
CE(%) |
Pcm(%) |
||
|
≤50mm |
>50-220mm |
≤50mm |
>50-220mm |
||
|
Q345GJ |
AR/N/NR/N+T |
≤0.41 |
≤0.43 |
≤0.28 |
≤0.28 |
|
TMCP |
≤0.38 |
≤0.40 |
≤0.24 |
≤0.26 |
|
|
Q390GJ |
AR/N/NR/N+T |
≤0.44 |
≤0.46 |
≤0.28 |
≤0.29 |
|
TMCP |
≤0.40 |
≤0.43 |
≤0.26 |
≤0.27 |
|
|
Q420GJ |
AR/N/NR/N+T |
≤0.47 |
≤0.49 |
≤0.30 |
≤0.32 |
|
TMCP |
≤0.40 |
Technical Agreement |
≤0.26 |
Technical Agreement |
|
|
Q460GJ |
AR/N/NR/N+T |
≤0.43 |
Technical Agreement |
||
※ Pcm(%)=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B
Mechanical Properties
|
|
Quality Level |
KV2 (J) |
Rm(MPa) |
A (%) |
ReH (MPa) |
180ºBending Test |
Yield Ratio |
||||||
|
Plate Thickness(mm) |
Plate thickness |
||||||||||||
|
Temp |
Not Less Than |
6-16 |
>16-35 |
>35-50 |
>50-200 |
>150-200 |
≤16 |
>16 |
|||||
|
Q345GJ |
B |
20 |
34 |
490-610 |
≥22 |
≥345 |
345-465 |
335-455 |
325-445 |
Technical |
d=2a,ok |
d=3a,ok |
≤0.83 |
|
C |
0 |
||||||||||||
|
D |
-20 |
||||||||||||
|
E |
-40 |
||||||||||||
|
Q390GJ |
C |
0 |
34 |
490-650 |
≥20 |
≥390 |
390-510 |
380-500 |
370-490 |
d=2a,ok |
d=3a,ok |
≤0.85 |
|
|
D |
-20 |
||||||||||||
|
E |
-40 |
||||||||||||
|
Q420GJ |
C |
0 |
34 |
520-680 |
≥19 |
≥420 |
420-550 |
410-540 |
400-530 |
d=2a,ok |
d=3a,ok |
≤0.85 |
|
|
D |
-20 |
||||||||||||
|
E |
-40 |
||||||||||||
|
Q460GJ |
C |
0 |
34 |
550-720 |
≥17 |
≥460 |
460-600 |
450-590 |
440-580 |
d=2a,ok |
d=3a,ok |
≤0.85 |
|
|
|
|
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