Product Attribute:
Material:Steel,ST37.4
Size:10mm
Typical Clients:
BMW
Production Description:
Tube diamensions for the automotive industry
Outside diameter ranges from 4 to 60 mm and wall thickness ranges from 0.5 to 7mm. Precision steel tubes are delivered according to EN 10305-1, DIN 2391, BS 6323/4,ASTM A519 and JIS G3445.
l TOLERANCE TABLE OF STEEL TUBE
NAME |
SCOPE(mm) |
GB (mm) |
DIN (mm) |
Enterprise control(mm) |
Special high-precision(mm) |
|
OD Out Diameter |
4-30 |
±0.1 |
±0.08 |
±0.05 |
±0.03 |
|
31-40 |
±0.15 |
±0.15 |
±0.05 |
±0.03 |
|
41-50 |
±0.20 |
±0.20 |
±0.08 |
±0.03 |
|
51-60 |
±0.25 |
±0.25 |
±0.08 |
±0.03 |
|
Wall thickness |
0.5-7 |
±10%,Min±0.12 |
±10% |
±10%,Min±0.05 |
±10%,Min±0.03 |
Steel grades for precision tubes for the automotive industry
|
Standard |
Material |
EN10305-1
|
E215, E235, E255, E355,C45E, 30GrMo |
DIN2391-2
|
ST35,ST45,ST52 |
BS6323/4
|
CFS3,CFS4,CFS5,CFS8 |
|
ASTMA519 |
SAE1010,SAE1020,SAE1045 |
JISG3445
|
STKM11A,STKM13A |
|
SAEJ524 |
SAE1010 |
Delivery condition and heat treatment processing of precision tubes for the automotive industry
Delivery Condition |
Heat treatment process |
|
+C |
Cold drawn/hard.After the last cold forming,no heat treatment. |
|
+LC |
Cold drawn/soft.After the last heat treatment follows the cold drawing there is a light finishing pass.
|
|
+SR |
Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere. |
|
+A |
After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere. |
|
+N |
Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere.
Length of precision tubes for the automotive industry
|
random length precision tubes in the range of 3 -10 m
approximate length with tolerance +/-10 mm
tubes for the automotive industry also can be delivered as cut tubes according to custome
rs requirment.
Marking of precision tubes and bundles of precision tubes
Marking of standard precision tubes is done according to standards or upon agreement by the InkJet system either
in one spot or along the whole length of a tube. Bundle marking is done either by one or multiple labels with required data.
Surface protection of precision tubes for the automotive industry
Tubes are supplied with anticorrosion application. Internal surface and external surface are flushed with antirust oil.
Testing of precision tubes for the automotive industry
The mandatory tests for standard precision tubes are chemical analysis, tensile test, dimensional inspection and visual inspection.
Specific testing acceptance testing certificate 3.1.B (3.1.A, 3.1.C).
Elective testing: flattening test or drift expanding test, roughness measurement and NDT to find longitudinal defects: eddy current inspection test,as a proof of tightness or leakage test by eddy current EN 10246 Certificates for precision tubes
Certificates are issued according to standards, as an example we are showing: EN 10 204 (non-specified testing 2.2, specified testing 3.1.B or 3.1.A, 3.1.C).
Competitive Advantage:
Certificate we awarded:TS 16949
Our typical customer: Continential Contitech,Benteler.