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- 27simn液壓支柱用無縫鋼管
-
27simn液壓支柱用無縫鋼管 |
標準 GB/T17396
用途 用于制造煤礦液壓支架和支柱的 缸、柱
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尺寸規格(mm)
|
外徑
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
壁厚
|
76(76.1)
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
|
|
|
|
|
83(82.5),89
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
|
|
|
|
(88.9)
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95.5
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
|
|
|
|
102.0
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
|
|
|
|
(101.6),105
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108 114
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
|
|
|
|
(114.3)
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121.0
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
|
|
|
|
127 133
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
140.0
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
(139.7),146
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152.0
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
(152.4),159
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168(168.3)
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
180(177.8)
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
194(193.7)
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
203.0
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
219.0
|
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
(219.1),224
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232.0
|
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
245.0
|
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
(244.5),252
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273.0
|
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
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299.3
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|
|
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
|
X
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X
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X
|
X
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(323.9)
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尺寸公差
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鋼管尺寸(mm)
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允許偏差(%)
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普通級
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較高級
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外徑
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±1
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±0.75
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壁厚
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≤20
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±12.5
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±10
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>20
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±12.5
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注:
1、長度鋼管的通常長度為3~12米;定尺和倍尺長度應在通常長度范圍內 ;定尺長度允許偏差為+20mm.
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2、彎曲度
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壁厚
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彎曲度
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≤
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S≤15mm
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1.3mm/m
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15≤S≤30mm
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1.5mm/m
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S≥30mm
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2 mm/m
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機械性能
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牌號
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抗拉強度
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屈服點
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伸長率
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斷面收縮率
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沖擊功
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硬度
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σb/MPa
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σb/MPa
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δ5(%)
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ψ(%)
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Aku 2/J
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HBS
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≥
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≤
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20
|
400
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245
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20
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-
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-
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-
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35
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510
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305
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17
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-
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-
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-
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45
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590
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335
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14
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-
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-
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-
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27SiMn
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980
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935
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12
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40
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39
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217
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注:
1、鋼管以熱軋狀態交貨。需方要求以退火或調質狀態交貨時,應在合同 中注明。
2、壁厚大于14mm鋼管應做沖擊試驗。
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化學成分(%)
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牌號
|
C
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Si
|
Mn
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P
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S
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Cr
|
Ni
|
Cu
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≤
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20
|
0.17~0.24
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0.17~0.37
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0.35~0.65
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0.035
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0.035
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0.25
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0.25
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0.2
|
35
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0.32~0.40
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0.17~0.37
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0.50~0.80
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0.035
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0.035
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0.25
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0.25
|
0.2
|
45
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0.42~0.50
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0.17~0.37
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0.50~0.80
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0.035
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0.035
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0.25
|
0.25
|
0.2
|
27SiMn
|
0.24~0.32
|
1.10~1.40
|
1.10~1.40
|
0.035
|
0.035
|
0.3
|
0.3
|
0.3
|
|
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