TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
Add to Cart
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 4-50mm
Diameter 16.5-350mm
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.
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