Basic Info.
Usage
Hydraulic/Automobile Pipe, Machinery Industry, Mining, Special Purpose
Bore Treatment
Honing, Skiving&Roller Burnishing
Bore Roughness
Ra0.25um Max
Transport Package
Standard Export Packing or Customized Packing
Specification
40mm*30mm-580mm*500mm
Product Description
PART I: PRODUCT INTRODUCTION
1. Description: Honed tube is a kind of smooth bore steel tube used to manufacture hydraulic cylinder barrels that is the core part of a piece of hydraulic cylinder.
2. Commodity: STKM 13C SAE 1045 AISI 1045 seamless honed steel tube for hydraulic cylinder
3. Size range: 40mm*30mm-580mm*500mm
4. Available steel grade:
SAE/AISI: | SAE1020, SAE1026, SAE1045, SAE4130, SAE4140 |
DIN: | ST52, ST52.3, ST52.4 |
EN: | E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470 |
GB: | 20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn, |
5. Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring
6. Delivery condition:
BK | BKW | BKS | GBK | NBK | Q+T |
+C | +LC | +SR | +A | +N |
Cold rolled | Cold drawn | Stress relieved | Annealed | Normalized | Quenched+Tempered |
7. Bore treatment: Honing, skiving&roller burnishing
8. Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes.
9. End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes.
10. Standard export packing: In bundles tied with steel strips. Int&ext oil coating. End plastic caps. External packing by PVC bags and knit bags.
11. Customized packing and marking can be provided upon request.
12. H8 tolerance:
ID range | Tolerance | ID range | Tolerance |
18< d ≤30 | +0/+0.033 | 180< d ≤250 | +0/+0.072 |
30< d ≤50 | +0/+0.039 | 250< d ≤300 | +0/+0.081 |
50< d ≤80 | +0/+0.046 | 300< d ≤315 | +0/+0.081 |
80< d ≤120 | +0/+0.054 | 315< d ≤400 | +0/+0.089 |
120< d ≤180 | +0/+0.063 | 400< d ≤500 | +0/+0.097 |
13. Difference between honed tube and skived&roller burnished tube: In hydraulic cylinder industry, there are 2 solutions for bore treatment: Honing, and skiving&roller burnishing. Honing or skiving&roller burnishing leads to different internal surface image, but both ensure good roughness.
INTERNAL SURFACE CONDITION OF HONED TUBES:
INTERNAL SURFACE CONDITION OF SKIVED&ROLLER BURNISHED TUBES:PART II: FREQUENTLY ASKED QUESTIONS
1. MOQ: Generally Min Order Quantity can be 2-3 tons/size for tubes with OD below 250mm, and 10 tons/size for tubes with OD above 250mm. Sometimes, it depends on steel grade you need. If you need special grade like E410, E470 or alloy steel tube, MOQ should be 10 tons/size at least.
2. Delivery Time: Generally, our delivery time for honed tubes is around 40-60 days depending on the sizes and quantities. It will take us 15-30 days to get raw material. For example, if you need 3 tons of small size honed tubes 50mm*40mm with roughness of Ra0.25um max, it will take us at least 30 days to hone this size.
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 INTRODUCTIONWe are a manufacturer of cold drawn, cold rolled, and hydraulic cold drawn steel tubes with OD upto 356mm since 2002. Covering an area of about 32000M2, we have 12 standard workshops with 2 hydraulic cold drawing benches, 4 chain cold drawing benches, and 2 ERW mills. Our facilities covers all the production procedures from pickling, cold drawing, heat treating, saw cutting, straightening, inspection, packing to further machining &turning, cold drawing die fabrication, and equipment repairation&maintenance.
FACTORY APPEARANCE:RAW MATERIAL STOCK:
HYDRAULIC COLD DRAWING:
MULTI-ROLLER STRAIGHTENING:
STRAIGHTENING BY PRESS:
SAW CUTTING:
LATHES:
HONING:
DEEP HOLE BORING/DRILLING:
SKIVING&ROLLER BURNISHING:
Address:
Xinnan Village, Yaoguan Town, Wujin Dist, Changzhou, Jiangsu, China
Business Type:
Manufacturer/Factory
Business Range:
Auto, Motorcycle Parts & Accessories, Industrial Equipment & Components, Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy
Management System Certification:
ISO 9001
Company Introduction:
Established in 1998, Changzhou Chengxin Metal Products Co., Ltd manufactures small size ERW steel tubes and cold drawn precision steel tubes upto 325mm in OD.
Started as a ERW steel tube manufacturer in East China, we are now mainly serving industries like furniture, electrical bicycle, solar power, etc.
Since 2008, we began to produce hydraulic cold drawn steel tubes that are wodely used in hydraulic cylinder, oil drilling&exploration, machineries, etc. Right now, our main customers are world′s major excavator cylinder manufacturers like KYB, DY Power, etc. Hydraulic cold drawn steel tube has been our main sector since the beginning of investment, and we enjoyed an anual turnover increase of 20%-30% in the past 6 years. Right now, we have been a major manufacturer of cold drawn (and honed or skived&roller burnished) seamless tubes for hydraulic cylinders with size range of 50mm*40mm-325mm*280mm in China.
We have improved our management system and production facilities like skiving&roller burnishing machining, non-destructive detection system, and CNC turning lathe to provide more and better service for our customers.
We are ready to serve more customers from all over the world.