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Cold Drawn Precision Seamless Steel Tube
Cold Drawn Precision Seamless Steel Tube, Seamless Precision Steel Tube Manufacturers, Cold Drawn Pipe and Supply, Round Cold Drawn Seamless Hydraulic Steel Tube, Seamless Precision Steel Tube DIN 2391, Carbon steel precision tube, Seamless Carbon Steel Pipe Manufacturer
Specification for Cold Drawn Precision Seamless Steel Tube
OD: 48mm(1-1/2’’)~325mm(12’’)
WT: 3mm~45mm
LENGTH: 4m~10m
Standards & Grades for Cold Drawn Precision Seamless Steel Tube
EN: E215, E235, E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470
DIN: ST52, ST52.3, ST52.4
GB: 20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn
Surface Treatment:
l Normal surface
l Inner surface or outside surface treatment, honing process, grinding, polishing, oiled...etc.
l Surface roughness Ra0.3um- Ra0.6um.
l End finish: Plain ends or bevelled ends.
H8 Tolerance:
ID range
|
Tolerance
|
ID range
|
Tolerance
|
18< d ≤30
|
+0/+0.033
|
180< d ≤250
|
+0/+0.072
|
30< d ≤50
|
+0/+0.039
|
250< d ≤300
|
+0/+0.081
|
50< d ≤80
|
+0/+0.046
|
300< d ≤315
|
+0/+0.081
|
80< d ≤120
|
+0/+0.054
|
315< d ≤400
|
+0/+0.089
|
120< d ≤180
|
+0/+0.063
|
400< d ≤500
|
+0/+0.097
|
Hot Treatment & Delivery Condition for Cold Drawn Precision Seamless Steel Tube
BK + C
|
BKW + LC
|
BKS + SR
|
GBK + A
|
NBK + N
|
Q + T
|
Cold Rolled
|
Cold Drawn
|
Stress Relieved
|
Annealed
|
Normalized
|
Quenched + Tempered
|
Application for Cold Drawn Precision Seamless Steel Tube:
Fluid Conveying
Hydraulic Cylinder
Pneumatic Cylinder
High Precision Machine Pipes
Agriculture Machine
Boiler Pipe & Industry Construction
Mechanical Processing
Pneumatic Cylinder
High Precision Machine Pipes
Agriculture Machine
Boiler Pipe & Industry Construction
Mechanical Processing
Automobile Industry
Condensing Unit Pipe
Cold Drawn Precision Seamless Steel Tube is a kind of high precision steel tube material processed by cold drawing or hot treatment. Its main features are no oxide layer on the inner and outer surface of the steel tube, no leakage under high pressure, high precision, high finish, no deformation during cold bending, no cracks in the flapping and flattening. Therefore, cold drawn precision seamless steel tube is mainly used in hydraulic system/pneumatic system, automobile manufacturing, project machinery, petrochemical industry, power station, boiler equipment and other industries.
DIN 2391-1 Chemical Composition
Grade
|
Chemical Composition(%):
|
||||
C max
|
Si max
|
Mn
|
P max
|
S max
|
|
DIN 2391 St 35
|
0.17
|
0.35
|
≥0.40
|
0.025
|
0.025
|
DIN 2391 St 45
|
0.21
|
0.35
|
≥0.40
|
0.025
|
0.025
|
DIN 2391 St 52
|
0.22
|
0.55
|
≤1.60
|
0.025
|
0.025
|
Grade
|
Chemical Composition(%):
|
||||||
Steel name
|
Steel number
|
C max
|
Si max
|
Mn
|
P max
|
S max
|
Al min
|
E215
|
1.0212
|
0.10
|
0.05
|
0.70
|
0.025
|
0.025
|
0.025
|
E235
|
1.0308
|
0.17
|
0.35
|
1.20
|
0.025
|
0.025
|
-
|
E355
|
1.0580
|
0.22
|
0.55
|
1.60
|
0.025
|
0.025
|
-
|
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