Fuel Injection High Pressure Oil Hydraulic Cylinder Seamless Steel Tube
China Precision Steel Tube leading supplier, choose the high quality Hydraulic Precision Steel Tube, Precision Carbon Steel Tube, Precision Seamless Steel Tube, CDS Steel Tube, CDW Steel Tube
Wall thickness 4-30mm
Diameter 1-12.5mm
Length 5-6m Upon request
Application :Diesel(compression-ignition)engines
Produce method: shall be manufactured from unalloyed quality steel or an equivalent steel produced by a steel-making process that ensures a very homogeneous structure.
The final reduction of the tube shall be followed by treatment to achieve the specified mechanical properties. Please advise.
Characteristic:Precision,Smooth finish,Cleanliness,High mechanical properties.
Delivery condition: NBK/GBK.
Outside surface condition
0: No
1:Outside surface as processed, without any additional finish. Tubes annealed or normalized in a controlled atmosphere may be discoloured,but shall be free from loose scale.
2.Zinc electroplated with a coating layer thickness of 8μm minimum and an additional colourless chromatinga
3. Zinc electroplated with a coating layer thickness of 8μm minimum and an additional yellow chromating
4 ,5,6,7,8 Reserved for further application
9 As specified subject to agreement
A: Chromating as described in ISO2080 and ISO4520
Characteristic :
Mechanical properties
| Code | Tensile strength Rm N/mm2 Min | Proof strength Rp0.2 N/mm2 Min | Elongation A5 % | Hardness HV Max |
| 1 | 310 | 205 | 30 | 115 |
| 2 | 360 | 220 | 23 | 150 |
| 3 | 490 | 335 | 22 | 194 |
| 4 | 600 | 430 | 15 | 280 |
| Note: The mechanical properties apply when the tubes is tested in accordance with ISO6507-1 and ISo6892-1 |
Tolerance is
Inside diameter ,d
d≤4mm:±0.05mm for class2 (for diesel (compression-ignition)engines)
±0.025mm for class 1(for fuel injection pump testing)
d＞4mm:±0.10mm
Outside diameter,D
D＜8mm:±0.06mm
D≥8mm: ±0.10mm
For Class 1 and Class2 Please refer above explain.
The maximum value of the concentricity of the tube outside diameter relative to inside diameter shall be proportional to the wall thickness, as shown in Figure1.
Normative references: ISO404 Steel and steel products-General technical delivery requirements.
ISO6507-1 Metallic materials-Vickers hardness test-Part1: Test method
ISO6892-1 Metallic materials-Tensile testing-Part1:Method of test at room temperature
ISO12345 Diesel engines-Cleanliness assessment of fuel injection equipment
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.
FAQ
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples of carbon seamless steel tube ? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
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