Product Details

hydraulic H8 precision ISO 9001 verified seamless steel pipe carbon tube

What we focus on are:

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

1.Product Name: hydraulic H8 precision ISO 9001 verified seamless steel pipe carbon tube

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

Chemical composition

Steel grade	Chemical composition
Steel grade	C	Si	Mn
20#	0.17-0.24	0.17-0.37	0.35-0.65
45#	0.42-0.50	0.17-0.37	0.50-0.80
16Mn	≤0.2	≤0.5	1.00-1.60
25Mn	0.22-0.29	0.17-0.37	0.70-1.00
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40
SAE1026	0.22-0.28	0.15-0.35	0.60-0.90

Mechanical property

Delivery Condition	Cold drawn+stress-relieved(BK+S)(SR)			Cold finished(hard)(BK)
Steel Grade	Tensile strength (Rm Mpa)	Yield strength (ReH Mpa)	Elongation A5%	Tensile strength (Rm Mpa)	Elogation A5%
20#	≥520	≥375	≥15	≥550	≥8
45#	≥600	≥520	≥10	≥640	≥5
16Mn(Q345B Q345D)	≥600	≥520	≥14	≥640	≥5
25Mn	≥600	≥510	≥15	≥640	≥5
E355(St52)	≥600	≥520	≥14	≥640	≥5

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.

Application

hydraulic H8 precision ISO 9001 verified seamless steel pipe carbon tube 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.

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.

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