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船舶用无缝钢管尺寸、性能、化学成分
船舶用无缝钢管 GB/T5312-1999（热轧、挤压、扩管）船舶用无缝钢管
尺寸公差
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尺寸公差
|
|
外径(D)
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≤159
|
%26gt;159
|
|
外径允许偏差
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±1.0%(最小为±0.5mm)
|
±1.25%
|
|
壁厚(S)
|
≤20
|
S%26gt;20
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D≥351
|
|
壁厚允许偏差
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+15%,-10%(最小为+0.45mm,-0.30mm)
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±10%
|
±15%
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纵向力学性能
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纵向力学性能
|
|
类别
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纲级
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抗拉强度(MPa)
|
屈服点(MPa)≥
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延伸率（%）≥
|
|
碳钢和碳锰钢
|
360
|
360-480
|
215
|
24
|
|
410
|
410-530
|
235
|
22
|
|
490
|
490-610
|
285
|
21
|
|
1Cr0.5Mo
|
440
|
440-600
|
275
|
22
|
|
2.25Cr1Mo
|
410
|
410-560
|
235
|
20
|
|
490
|
490-640
|
275
|
16
|
化学成分
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化学成份
|
|
分类
|
钢级
|
C
|
Si
|
Mn
|
P≤
|
S≤
|
Cr
|
Mo
|
Ni
|
Cu
|
Sn
|
W
|
总量
|
|
碳钢和
碳锰钢
|
360
|
≤0.17
|
≤0.35
|
0.40-0.80
|
0.040
|
0.040
|
≤0.25
|
≤0.10
|
≤
0.30
|
≤
0.30
|
-
|
-
|
≤
0.70
|
|
410
|
≤0.21
|
≤0.35
|
0.40-1.20
|
0.040
|
0.040
|
≤0.25
|
≤0.10
|
≤
0.30
|
≤
0.30
|
-
|
-
|
≤
0.70
|
|
440
|
≤0.23
|
≤0.35
|
0.80-1.50
|
0.040
|
0.040
|
≤0.25
|
≤0.10
|
≤
0.30
|
≤
0.30
|
-
|
-
|
≤
0.70
|
|
1Cr0.5Mo
|
440
|
0.10-0.18
|
0.10-0.35
|
0.40-0.70
|
0.040
|
0.040
|
0.70-1.10
|
0.45-0.65
|
≤
0.30
|
≤
0.25
|
≤
0.03
|
≤
0.020
|
-
|
|
2.25Cr1Mo
|
410
|
0.08-0.15
|
0.10-0.35
|
0.40-0.70
|
0.040
|
0.040
|
2.00-2.50
|
0.90-1.20
|
≤
0.30
|
≤
0.25
|
≤
0.03
|
≤
0.020
|
-
|
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