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, 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.
典型的钢等级/规格
成绩 |
规格 |
尺寸范围 |
交货条件 |
Q345GJB / C / D / E-Z15 / Z25 / Z35 |
GB / T 19879 |
6-200 |
AR / NR / N / N + T / TMCP |
Q390GJC / D / E-Z15 / Z25 / Z35 |
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Q420GJC / D / E-Z15 / 25/35 |
AR / NR / N / N + T / Q + T / TMCP |
Properties Of Typical Grades
Chemical Composition
钢 |
成绩 |
化学成分（wt％） |
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C |
SI. |
m |
P. |
S. |
V. |
NB. |
TI. |
ALS. |
CR. |
铜 |
你 |
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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 |
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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. |
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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. |
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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 |
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E. |
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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 |
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E. |
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|
S含量（wt％） |
区域减少Z（％） |
|
平均值三个样本 |
单样本的价值 |
||
Z15 |
≤0.005 |
≥15 |
≥10 |
Z25 |
≤0.005 |
≥25 |
≥15 |
Z35 |
≤0.005 |
≥35 |
≥25 |
|
交货条件 |
CE（％） |
PCM（％） |
||
≤50mm |
> 50-220毫米 |
≤50mm |
> 50-220毫米 |
||
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. |
技术协议 |
≤0.26 |
技术协议 |
|
Q460GJ. |
AR / n / nr / n + t |
≤0.43 |
技术协议 |
||
※ Pcm(%)=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B
机械性能
|
质量水平 |
Kv2（j） |
RM（MPA） |
一种 （％） |
reh（mpa） |
180°Centring |
屈服比 |
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板厚度（mm） |
板厚 |
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临时 |
不小于 |
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. |
技术 |
d = 2a，好的 |
d = 3a，好的 |
≤0.83. |
C |
0. |
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D. |
-20 |
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E. |
-40 |
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Q390GJ. |
C |
0. |
34. |
490-650. |
≥20 |
≥390 |
390-510 |
380-500. |
370-490. |
d = 2a，好的 |
d = 3a，好的 |
≤0.85. |
|
D. |
-20 |
||||||||||||
E. |
-40 |
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Q420GJ. |
C |
0. |
34. |
520-680 |
≥19 |
≥420 |
420-550 |
410-540 |
400-530 |
d = 2a，好的 |
d = 3a，好的 |
≤0.85. |
|
D. |
-20 |
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E. |
-40 |
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Q460GJ. |
C |
0. |
34. |
550-720. |
≥17 |
≥460. |
460-600. |
450-590. |
440-580 |
d = 2a，好的 |
d = 3a，好的 |
≤0.85. |
|
否下一步
