EN10305-2 GB/T3639 E155, E195, E235 E275, E355 DOM Steel Tube Welded Carbon Steel Pipe for Hydraulic Steel Tubing

DOM Welded Carbon Steel Pipe EN10305-2 for Hydraulic Steel Tubing E155, E195, E235 E275, E355
 
Size range: O.D.:6-420mm W.T.:1-50mm L:max12000mm
 
Applications: for Auto Industry/ Machinery Use/ Oil Cylinder Tube/ Motorcycle Shock Absorber/
Auto Shock Absorber/ Inner Cylinder/ Telescopic Cylinders/ Jack Lifting System/ Hydraulic Cylinders
 
Appearance:
The internal and external surface finish of the tubes is smooth, while the Weld Seam is somehow not visible or tangible.
The ID surface with roughness Ra≤4μm, the best ID smoothness we could reach Ra≤0.8μm
The inner surface can be measured and reported if this is requested by the purchaser before PO.
 
Supplying Steel Grade:
E155, E195, E235 E275, E355
 
Delivery Condition:
+C, +Lc, + SR, +A, +N
 
Steel Grade and Chemical Compositions:

Note: Special steel grade is also available, according to customer request.
 
Production Method:

 
For Application of:

Relate Information:
 
Quality Inspection standard and Normative references:
EN10002-1, Metallic materials- Tensile testing- Part 1: Method of test at ambient temperature
EN10020, Definition and classification of grades of steel
EN10021, General technical delivery requirements for steel and iron products.
EN10027-1, Designation systems for steel - Part 1: Steel names, principal symbols.
EN10027-2, Designation systems for stee l- Part 2: Numerical system
EN10052, Vocabulary of heat treatment terms for ferrous products
EN10204, Metallic Products - Types of inspection documents
EN10233, Metallic materials - Tube - Flattening test
EN10234, Metallic materials - Tube - Drift expanding test
EN10246-1, Non-Destructive testing of steel tubes - Part 1: Automatic electromagnetic testing of seamless and welded(except submerged arc-welded) ferromagnetic steel tubes for verification of hydraulic leak-tightness
 
EN10246-3, Non-Destructive testing of steel tubes - Part 3: Automatic eddy current testing of seamless and welded ( except submerged arc-welded) steel tubes for the detection of imperfections
 
EN10246-5, Non-Destructive testing of steel tubes - Part 5: Automatic full peripheral magnetic transducer /flux leakage testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection of longtitudinal imperfections
 
EN10246-7, Non-Destructive testing of steel tubes - Part 7: Automatic full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal imperfections.
 
EN10256, Non-Destructive testing of steel tubes - Qualification and competence of level 1 and 2 non-destructive testing personnel
 
EN ISO377, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing ( ISO 377:1997)
 
EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels ( ISO2566-1:1984)
 
ENV10220, Seamless and welded steel tubes - Dimension and masses per unit length.
 
EN10266, Steel Tubes, fittings and structural hollow sections - Definition and Symbols for use in products standards
 
 
 


 

QUALITY CONTROL

1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.
 
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.