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[China]
Trade Verify
Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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Verified Suppliers
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Product Description
Manufacture Method:
Cold drawn, hot rolled+deep hole bored
Certification:
ISO9001, SGS,
Material:
Carbon steel,alloy steel, stainless steel
Standard&Grade:
DIN2391-2 ST52,EN10305-1 E355,C45E,25CrMo4,42CrMo4, CK45,E410, E470,ASTM A519 SAE1020,SAE1026,SAE1045,SAE1518,SAE1541, SAE4130,SAE4140,SAE4145,SAE4340,etc.
Size Range:
ID of 300mm max for cold drawing,
ID of 500mm for deep hole boring
ID Tolerance:
ISO H8
End finish:
Plain ends with square cuts,free of burrs
Bore Roughness:
Ra0.30um max for honed tubes, Ra0.25um Max for Skived&roller
burnished tubes
End finish:
Plain ends with square cuts,free of burrs
Usage:
Hydraulic cylinder, Pneumatic Cylinder
Product Feature:
1.High precision (can cut the costs of machining) .
2.Excellent surface finish
3.Good mechanical performance (Aneal ,Bright Anealing,QT heatment
on steel tubes to reach customers' Mechanical requsts. )
1.+C /BK
No heat treatment after final cold drawing process.
2.+LC/BKW
After the final heat treatment there's a suitable drawing pass.
3.+SA/BKS
After the final cold drawing process there's a stress relief heat treatment in controlled atmosphere.
4.+A/GBK
After the cold drawing process the tubes are annealed in a controlled atmosphere.
5.+N/NBK
After the final cold drawing operation the tubes are normalized in a controlled atmosphere.
The honing process makes :
1.Smooth surface finishes inside bores
2.Hold precise tolerances on bore diameters
ID H7 H8 H9
ID roughness 0.2-0.8μm
ID max 630mm
Two thin chips are cut at high feed rate while the tool passes
through the workpiece.producing super finish surface,with a bore
precise tolerance .
ID H7 H8 H9
ID roughness 0.2-0.8μm
ID max 630mm
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.
Packing Details : In bundles or in wooden boxes packaging of honed
tube
Delivery Details : 30-60days
A: We are factory.
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
