PART I: PRODUCTION INTRODUCTION
1. Description: Precision steel tube is a kind of cold drawn or cold rolled steel tube with special surface quality or very tight size tolerance, and it is always customized.
2. Commodity: Cold drawn seamless alloy steel precision tube
3. Size range: 60mm-325mm with ID upto 300mm or W.T upto 50mm.
4. Standard specification&steel grade:
| EN 10305-1 |
25CrMo4, 34CrMo4, 42CrMo4, |
| ASTM A519 |
4130, 4140, 4145, 4340, 8620 |
| JIS |
STKM 13A, STKM 13B, STKM 13C |
| GB |
20CrMo,30CrMo,35CrMo,42CrMo, |
5. Manufacture method: hydraulic cold drawn
6. Delivery condition:
| BK |
BKW |
BKS |
GBK |
NBK |
| +C |
+LC |
+SR |
+A |
+N |
| Cold rolled |
Cold drawn |
Stress relieved |
Annealed |
Normalized |
7. End finish: plain ends with square cuts,free of burrs.
8. Marking: as per request
9. Standard export packing: in bundles tied with steel strips. Int&ext oil coating. External packing by PVC bags and knit bags.
10. Customized packing and marking are available upon request.
PART II: FREQUENTLY ASKED QUESTIONS
1. MOQ: Generally, Min Order Quantity can be 1 ton/size.
2. Delivery Time: Generally, our delivery time is around 20-35 days depending on availability of raw material.
3. Warranty&Guarantee: Warranty&guarantee period is 6 months since we deliver the tubes, and we are not responsible for quality problem caused by wrong unloading or storage after shipment. We welcome customer's inspection before shipment.
4. Payment Method: We accept payment method like T/T, L/C, or D/P, but it depends on our investigation about customers. We have a solution to evaluate the credit of customers from all over the world, and time and amount of D/P we can release is determined by the evaluation.
5. Quality Control: 90% of the tubes are made from hot rolled seamless pipes. So, quality of raw material determined quality of finished tubes. We purchase raw material from stable suppliers who are leading steel mills, and we inspect the raw material as per the specifications. During our production procedure, there is inspection and quality control in every stage.
PART III: COMPANY INTRODUCTION
We are a manufacturer of cold drawn and honed or skived&roller burnished seamless tubes for hydraulic cylinder barrels. We have facilities covering pickling,cold drawing,heat treating,straightening,automatic saw cutting,non destructive detection,honing and skiving&roller burnishing,OD machining,OD polishing,CNC turning,etc.
FACTORY APPEARANCE:
Audited Supplier 
){kind=link}
){kind=link}