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Seamless Steel Tube
I. High Pressure Seamless Tube
1. Typical Application: High pressure and super high pressure boiler, which needs high quality carbon steel, alloy and high temperature stainless steel to work under high pressure and high temperature.
2. Series, Elements and Property
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China
|
Equivalent
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Contains
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Mechanical Characteristics
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|
USA
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Japan
|
Germany
|
C
|
Mn
|
Si
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Cr
|
Mo
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Tension (kgf/m )
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Yield Point (kgf/m)
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Extension Rate /(%)
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Impact (kgf-m/
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|
20G
|
1020
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S20C
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C22E
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0.17-0.24
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0.35-0.65
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0.17-0.37
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|
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42-56
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 25
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24
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5
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15CrMo
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SCM415
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15CrMo5
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0.12-0.18
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0.40-0.70
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0.17-0.37
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0.80-1.10
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0.40-0.55
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45-65
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24
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21
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6
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12CrMo
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4119
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13CrMo44
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0.08-0.15
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0.40-0.70
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0.17-0.37
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0.40-0.70
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0.40-0.70
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42-57
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21
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21
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7
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II. Seamless Tube for Automotive Shaft Bushing
1. High Quality Carbon Steel or Alloy Hot Drawn Seamless Tube used to make automotive semi-cam bushing and driver shaft bushing.
2. Typical Series, Element and Property
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China
|
Equivalent
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Contains
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Mechanical Characteristics
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Hardness
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USA
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Japan
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Germany
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C
|
Mn
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Si
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S
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P
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Cr
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Ni
|
Cu
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ab(kgf/m)
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ab(kgf/m)
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a5(%)
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HB
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Diameter/mm
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45
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1045
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S45C
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S45E
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0.42-0.50
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0.50-0.80
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0.17-0.37
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 0.040
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0.040
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0.25
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0.25
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0.25
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60
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34
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14
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|
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45Mn2
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1345
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SMn443
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46Mn7
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0.42-0.49
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1.40-1.80
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0.20-0.40
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0.040
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0.040
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0.35
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0.30
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217-269
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4.1-3.7
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40Cr
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5140
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SCr440
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41Cr4
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0.37-0.45
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0.50-0.80
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0.20-0.40
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0.040
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0.040
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0.80-1.10
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0.35
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0.30
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217-269
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4.1-3.7
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III. Structural Seamless Tube
1. Typical Application: Outer ring of bearing, hydraulic jack bushing and other structural parts, such as oil field drilling shaft, automotive driving shaft, bicycle frame and construction purposes.
2. Series and Spec
High grade structural Seamless Tube
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China
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Equivalent
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Property
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USA
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Japan
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Germany
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Tension N/m
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Yield Point 6s, N/m(Brass Wall Thickness)
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Extention Rate  5%
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Plate distance for compression Test
Hmm
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16mm
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> 16-30mm
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> 30mm
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20
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1020
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S20C
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C22E
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390
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245
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235
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225
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20
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2/3D
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45
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1450
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S45C
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C45E
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590
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335
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325
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315
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14
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Alloy Steel Structural Seamless Tube
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China
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Equivalent
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Property
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USA
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Japan
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Germany
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Tension 6bN/m
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Yield Point 6s, n/m(Brass Wall Thickness)
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Extension Rate 5%
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Annealed or Tempered Status HB
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35CrMo
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4135
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SCM435
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34CrMo4
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980
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835
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12
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229
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42CrMo
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4140
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SCM440
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42CrMo4
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1080
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930
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12
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217
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20CrMoTi
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1080
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835
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10
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217
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IV. Oil Field Drilling Shaft Tube
1. Typical Application: Oil Field Drilling shaft using tube with re-enforced wall thickness
2. Series and Property
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China
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Equivalent
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Property
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USA
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Japan
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Germany
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Tension(kgf/m
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Yield Point (kgf/m)
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Extension(%)
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Shrinkage(%)
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Impact((kf-C/
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DZ50
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70
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50
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12
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40
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4
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DZ75
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85
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75
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10
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40
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4
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DZ95
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105
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95
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10
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40
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4
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Series and Sizes
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Seamless Tube
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Series
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Carbon Structural
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Carbon Structural
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Alloy Tool Steel
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Alloy Tool Steel
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Bearing Steel
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Sizes
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 32-108 X 4-25
(76 Group Dis)
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73-203 X 10-50
(170 Group Dis)
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32-108 X 4-25
(76 Group Dis)
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73-203 X 10-50
(170 Group Dis)
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32-108 X 4-25
(76 Group Dis)
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