What we focus on are:

--Tight tolerance
--High quality
--Good mechanical property
--Quick delivery
--Best service
--Reasonable price

1.Product Name: cold rolled polished tube EN10305 cylinder seamless pipe

2.Outer Diameter: 30-250mm
3.Wall Thickness: 2-30mm
4.Material Grade: 20# 45# 16Mn 25Mn 27SiMn E355
5.Package: Standard export packing or as client’s request
6.Delivery Condition: BK/BKW/BKS/GBK/NBK
7.Delivery Time: Within 20-30 days after receiving payment or as client’s request
8.Trade Terms: FOB Yantai, Qingdao, or as client’s request
9.Payment Terms: T/T or L/C or as client’s request
10.Supply Ability: 500 metric tons/per month

PROCESS

Equipped with JLB250T hydraulic cold drawn set, LD120 cold rolling set, annealing furnace, strong honed machine, polishing machine, lathe, saws CNC skived and roller burnished machine, kinds of testing machine.

Acid cleaning- Parkerizing

Cold drawn/cold rolled

Annealing furnace—— stress-relieving (+SR)

Straightener—— Straightening/ Leveling

 Straightness inspecting

Dimension inspecting

Sawing

Lathe

Surface Polishing

Hone Or SRB

Package&Shipping

Packaging:

Usually we use plastic bags and bundled ,or wooden cartons outside to sustain long sea trasportation.

Or we can package as client's request totally.

Shipping:

Within 20-30 days after receiving client's payment or as client's request.

Delivery condition

1. NBK(+N)

after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium

2. GBK(+A)

after cold forming, annealing in non oxidizing medium protective gas

3. BK(+C)

the final heat treatment after cold forming, therefore small steel pipe plastically, the plastically degree does not guarantee

4. BKW(+LC)

after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)

5. BKS(+SR)

have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing

Certification

Passing ISO 9001 System, our products are in tight tolerance and high quality control to meet every client's request.

Customer&Supplier

We have regular supplier such as Baosteel, Zhongke innovation, PangangGroup, which assure our high quality material .
Just because the 100% quality guarantee material, all our products are popular at home and abroad, Doosan, Sinotruk, and many foreign companies in Australia, Ukraine, Korea, etc.

Application

cold rolled polished tube EN10305 cylinder seamless pipe are widely used in hydraulic system with precision steel tube, hydraulic press with precision steel tube, shipbuilding with steel tube, engineering machinery, automotive high pressure steel pipe concrete pump, sanitation vehicle, automobile industry, shipbuilding industry, metal processing, and other field.

Service

1.100% quality satisfaction guarantee following with ISO9001 verified

2. professional package which can assure long distance sea transportation

3. delivery in time

4. more than 20 years experience specializing in steel trading line

5.alibaba trade assurance supplier

FAQ

1. What is your terms of delivery?
We accept FOB Yantai, Qingdao or as client’s request.  

2.What’s your main market?

We have contacted with many countries all over the wold such as Korea, Iran, Ukraine, Pakistan and so on.

3.What’s your package?

Usually, we have standard package with plastic bags, or wooden cartons or as client’s request.

4.What about your quality?

Strictly followed by ISO9001 system, all our products are in high quality control and tight tolerance.

We can provide seamless steel pipe, cold drawn/rolled steel pipe, honed/SRB steel pipe, and any other precision steel pipe which can be used for hydraulic cylinder.

 Main products

1.Seamless steel tube

Widely used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. Material is various, mainly STKM-13CT ST52 CK45 and 1020. We can also offer ascustomized seamless steel tube.

ld drawn/rolled steel tube

Grade: 20#  45#  16Mn  25Mn  27SiMn  E355  SAE1026

Standard: GB/T8713  GB/T3639  DIN2391  EN10305  ASTMA519

Range: 30-300mm

Length: 11m(max)

The cold process can change the thickness of tube to meet client's request and offer better mechanical property. 

 3. SRB&Honed steel tube

ID Tolerance: H8  H9

ID Roughness: RA0.4micron(max)

Length: 6m(max)

Inner roughness: Ra0.2-0.8um

Straightness: 1:1000 or customized

This process can improve the roughness of the inner tube to 0.2-0.8um and make inside tube more smooth which can be used for cylinder directly.

If you are intrested in our products, pls feel free to contact us!