橋梁用結構鋼
1、格、牌號:
橋梁用結構鋼 |
執行標準 |
牌 號 |
產品規格(mm) |
國標 |
GB/T714、技術協議 |
Q345qC、Q345qD、345qE、 Q370qC、Q370qD |
6-80*1600-3200*4000-24000 |
2、化學成分Wt% 國標系列:
牌號 |
等級 |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
B |
N |
Als |
Q235q |
C |
≤0.17 |
≤0.35 |
≤1.40 |
≤0.030 |
≤0.030 |
≤0.30 |
≤0.30 |
≤0.30 |
/ |
≤0.012 |
≥0.015 |
D |
≤0.025 |
≤0.025 |
≤0.80 |
≤0.50 |
≤0.55 |
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E |
≤0.020 |
≤0.010 |
≤0.50 |
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Q345q |
C |
≤0.20 |
≤0.55 |
0.90-1.70 |
≤0.030 |
≤0.025 |
≤0.50 |
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D |
≤0.18 |
≤0.025 |
≤0.020 |
≤0.50 |
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E |
≤0.18 |
≤0.020 |
≤0.010 |
≤0.50 |
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Q370q |
C |
≤0.18 |
1.00-1.70 |
≤0.030 |
≤0.025 |
≤0.50 |
≤0.004 |
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D |
≤0.025 |
≤0.020 |
≤0.50 |
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E |
≤0.020 |
≤0.010 |
≤0.70 |
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Q420q |
C |
≤0.18 |
1.00-1.70 |
≤0.030 |
≤0.020 |
≤0.70 |
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D |
≤0.025 |
≤0.020 |
≤0.70 |
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E |
≤0.020 |
≤0.010 |
≤0.70 |
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Q460q |
C |
≤0.18 |
1.00-1.80 |
≤0.030 |
≤0.020 |
≤0.70 |
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D |
≤0.025 |
≤0.015 |
≤0.70 |
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E |
≤0.020 |
≤0.010 |
≤0.70 |
3、性能指標 國標系列:
牌號 |
等級 |
拉伸試驗 (橫向) |
V型沖擊試驗 (縱向) |
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下屈服強度 ReL/MPa |
抗拉強度 |
斷后伸長率A/% |
試驗溫度/℃ |
沖擊吸收能量KV2/J |
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厚度/mm |
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≤50 |
>50-100 |
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不小于 |
不小于 |
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Q235q |
C |
235 |
225 |
400 |
26 |
0 |
34 |
D |
-20 |
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E |
-40 |
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Q345q |
C |
345 |
335 |
490 |
20 |
0 |
47 |
D |
-20 |
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E |
-40 |
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Q370q |
C |
370 |
360 |
510 |
20 |
0 |
47 |
D |
-20 |
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E |
-40 |
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Q420q |
C |
420 |
410 |
540 |
19 |
0 |
47 |
D |
-20 |
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E |
-40 |
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Q460q |
C |
460 |
450 |
570 |
17 |
0 |
47 |
D |
-20 |
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E |
-40 |