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Add:No.18 Hengtong Road,Lu Qu Industrial Park,Yanshan Town,Wuxi
Tel:+86-510-83957008
+86-510-83958881
+86-510-83950008
Fax:+86-510-83958296
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| Technical Parameters | | | Inside diameter required precision
Seamless steel tube for hydraulic and pneumatic cylinder use
Size:I.D30-500mm
Thickness：2-50mm
Material：20# 45# 16 Mn 27SiMn 25Mn
Standard: GB/T8713-88 GB/T3639-2000 DIN 2391 EN10305
Mechanical properties
Steel grade
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Cold finished (hard) BK
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cold drawn and stress-relieved
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T.S
bN/M㎡
|
elongation
5%
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T.S bN/M㎡
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Y.S
sN/M㎡
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elongation
5%
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20#
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≥550
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≥8
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≥520
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≥375
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≥10
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45#
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≥640
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≥5
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≥600
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≥520
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≥10
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16Mn
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≥640
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≥5
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≥600
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≥520
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≥15
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25Mn
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≥640
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≥5
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≥600
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≥510
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≥15
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27SiMn
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≥840
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≥5
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≥800
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≥720
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≥10
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Dimension tolerance
Size of I.D
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I.D Tolerance
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Tolerance of wall thickness
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H8
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H9
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H10
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±5%
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30
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+0.033
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+0.052
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+0.084
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>30-50
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+0.039
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+0.062
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+0.100
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>50-80
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+0.046
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+0.074
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+0.120
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>80-120
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+0.054
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+0.087
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+0.140
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>120-180
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+0.063
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+0.100
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+0.160
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>180-250
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+0.072
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+0.115
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+0.185
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>250-315
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+0.081
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+0.130
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+0.210
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>315-400
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+0.089
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+0.140
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+0.230
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Product description
Processing form
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I.D
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length
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straightness
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I.D tolerance
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I.D Rounghness
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Cold-rolled
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30-100
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≤12M
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0.3-1.0
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H8-H10
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0.4-1.6
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Cold-drawn
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30-250
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≤12M
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0.3-1.0
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H8-H10
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0.8-1.6
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Hone
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40-500
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≤12M
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1000
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H8-H10
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0.4-0.8
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SRB
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40-400
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≤7M
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1000
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H8
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0.1-0.4
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Standard specifications
I.D mm
|
O.D mm
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TH mm
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Weight kg/m
|
I.D mm
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O.D mm
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TH mm
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Weight kg/m
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I.D mm
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O.D mm
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TH mm
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Weight kg/m
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30
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36
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3
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2.44
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90
|
114
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12
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30.18
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160
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170
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5
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20.34
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40
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50
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5
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5.55
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100
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108
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3.5
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8.93
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160
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172
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6
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24.56
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40
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55
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7.5
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8.79
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100
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114
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7
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18.47
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160
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180
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10
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41.92
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40
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58
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9
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10.88
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100
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121
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10.5
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28.61
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160
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184
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12
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50.90
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50
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60
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5
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6.78
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100
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127
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13.5
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37.79
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160
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194
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17
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74.20
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50
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63
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6.5
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9.06
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110
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120
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5
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14.18
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180
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192
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6
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27.52
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50
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65
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7.5
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10.63
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110
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126
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8
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23.28
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180
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194
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7
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32.28
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50
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70
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10
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14.80
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110
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133
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11.5
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34.46
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180
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200
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10
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46.86
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55
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65
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5
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7.40
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110
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140
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15
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46.42
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180
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203
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11.5
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54.31
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55
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70
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7.5
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11.56
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120
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140
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10
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32.06
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180
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219
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19.5
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95.93
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60
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70
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5
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8.01
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120
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146
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13
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42.64.
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200
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216
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8
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41.03
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60
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75
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7.5
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12.48
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125
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135
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5
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16.03
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200
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219
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9.5
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49.08
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63
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69
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3
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4.88
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125
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140
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7.5
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24.51
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200
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232
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16
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85.22
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63
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73
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5
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8.38
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125
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152
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13.5
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46.11
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200
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245
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22.5
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123.45
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63
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76
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6.5
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11.14
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125
|
159
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17
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59.53
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220
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250
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15
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86.93
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63
|
83
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10
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18.00
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140
|
152
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6
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21.60
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220
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273
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26.5
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161.09
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70
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83
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6.5
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12.26
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140
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159
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9.5
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35.00
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250
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270
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10
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64.12
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70
|
86
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8
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15.39
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140
|
163
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11.5
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42.96
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250
|
299
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24.5
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165.80
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80
|
86
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3
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6.14
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140
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168
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14
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53.17
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280
|
325
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22.5
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167.84
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80
|
90
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5
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10.48
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140
|
178
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19
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74.50
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300
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325
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12.5
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96.33
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80
|
95
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7.5
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16.18
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140
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180
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20
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78.91
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300
|
351
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25.5
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204.68
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80
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102
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11
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24.68
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150
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160
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5
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19.11
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300
|
377
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38.6
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321.38
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80
|
108
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14
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32.45
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150
|
163
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6.5
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25.09
|
320
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351
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15.5
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128.24
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90
|
100
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5
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11.71
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150
|
170
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10
|
39.46
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320
|
377
|
28.5
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224.93
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90
|
105
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7
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18.03
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150
|
175
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12.5
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50.09
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400
|
426
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13
|
132.40
|
90
|
108
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9
|
21.97
|
150
|
180
|
15
|
61.03
|
400
|
480
|
40
|
434.02
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Cold-draw or cold-rolled
Precision seamless steel tubes
material:st45 ck45 hardness: st45 HB:165-200 ck45 HB:207-240
length≤11mm
roughness of I.D :Ra≤1.6um
Hardness form
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Nominal diameter
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O.D.(mm0
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I.D. (mm)
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I.D. tolerance
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Hole roundness
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chromeplate
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28
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41.28
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28.58
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length≤11mm
+0.03
-0.05
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length≥8mm
-0.05
-0.15
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0.03
|
32
|
44.45
|
31.75
|
47.75
|
38
|
50.80
|
38.10
|
54.10
|
44
|
57.10
|
44.45
|
60.45
|
57
|
69.85
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57.15
|
73.15
|
70
|
82.55
|
69.85
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-0.03
-0.15
|
0.05
|
85.85
|
83
|
95.25
|
82.55
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-0.15
-0.25
|
98.55
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95
|
11.25
|
95.25
|
108
|
123.95
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107.95
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permeability
|
32
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44.45
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31.75
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-0.15
-0.25
|
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0.05
|
38
|
50.80
|
38.10
|
44
|
57.15
|
44.45
|
57
|
69.85
|
57.15
|
70
|
82.55
|
69.85
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