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結構用無縫鋼管
結構用無縫鋼管(GB/T8162)
中國標準：GB/T8162-2008
鋼級：20，45，20Mn，Q345B，Q345C,Q345D,45Mn2, 27SiMn
交貨狀態：熱軋
所屬分類：
結構用無縫鋼管
電話：
關 鍵 詞：
結構用無縫鋼管
產品細節
結構用無縫鋼管(GB/T8162)
中國標準：GB/T8162-2008
鋼級：20，45，20Mn，Q345B，Q345C,Q345D,45Mn2, 27SiMn
交貨狀態：熱軋
規格范圍：外徑73MM-630MM ,壁厚4MM-35MM
公差：按照GB/T8162-2008標準
長度：根據客戶要求
證書：GB/T19001-2008
● 化學成分（熔煉分析）％
|
鋼級
|
C
|
Si
|
Mn
|
P
|
S
|
Nb
|
V
|
Ti
|
Cr
|
Ni
|
Cu
|
N
|
Mo
|
B
|
Als
|
|
20
|
0.17-0.23
|
0.17-0.37
|
0.35-0.65
|
≤0.035
|
≤0.030
|
/
|
/
|
/
|
≤0.25
|
≤0.30
|
≤0.25
|
/
|
/
|
/
|
/
|
|
45
|
0.42-0.50
|
0.17-0.37
|
0.50-0.80
|
≤0.035
|
≤0.030
|
/
|
/
|
/
|
≤0.25
|
≤0.30
|
≤0.25
|
/
|
/
|
/
|
/
|
|
20Mn
|
0.17-0.23
|
0.07-0.37
|
0.70-1.00
|
≤0.035
|
≤0.030
|
/
|
/
|
/
|
≤0.25
|
≤0.30
|
≤0.25
|
/
|
/
|
/
|
/
|
|
Q345B
|
≤0.20
|
≤0.50
|
≤1.70
|
≤0.035
|
≤0.035
|
≤0.07
|
≤0.15
|
≤0.20
|
≤0.30
|
≤0.50
|
≤0.30
|
≤0.012
|
≤0.10
|
/
|
/
|
|
Q345C
|
≤0.20
|
≤0.50
|
≤1.70
|
≤0.035
|
≤0.030
|
≤0.07
|
≤0.15
|
≤0.20
|
≤0.30
|
≤0.50
|
≤0.30
|
≤0.012
|
≤0.10
|
/
|
≥0.015
|
|
Q345D
|
≤0.18
|
≤0.50
|
≤1.70
|
≤0.035
|
≤0.025
|
≤0.025
|
≤0.15
|
≤0.20
|
≤0.30
|
≤0.50
|
≤0.30
|
≤0.012
|
≤0.10
|
/
|
≥0.015
|
|
45Mn2
|
0.42-0.49
|
0.17-0.37
|
1.40-1.80
|
≤0.035
|
≤0.035
|
/
|
/
|
/
|
≤0.25
|
/
|
≤0.25
|
/
|
≤0.25
|
/
|
/
|
|
27SiMn
|
0.24-0.32
|
1.10-1.40
|
1.10-1.40
|
≤0.035
|
≤0.035
|
/
|
/
|
/
|
≤0.30
|
/
|
≤0.20
|
/
|
≤0.30
|
/
|
/
|
● 機械性能
|
鋼級
|
屈服強度 min Mpa
|
抗拉強度
|
伸長率
|
沖擊試驗
|
|||
|
T in mm
|
Mpa
|
||||||
|
≤16
|
＞16 ≤30
|
＞30
|
|
溫度/℃
|
沖擊功/J
|
||
|
|
≥
|
||||||
|
20
|
245
|
235
|
225
|
≥410
|
≥20
|
-
|
-
|
|
45
|
335
|
325
|
315
|
≥590
|
≥14
|
-
|
-
|
|
20Mn
|
275
|
265
|
255
|
≥450
|
≥20
|
-
|
-
|
|
Q345B
|
345
|
325
|
295
|
470-630
|
≥20
|
20
|
34
|
|
Q345C
|
345
|
325
|
295
|
470-630
|
≥21
|
0
|
34
|
|
Q345D
|
345
|
325
|
295
|
470-630
|
≥21
|
-20
|
34
|
|
45Mn2
|
885
|
≥735
|
≥10
|
-
|
-
|
||
|
27SiMn
|
980
|
≥835
|
≥12
|
-
|
-
|
||
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