Specifications

1.Raw material:20#.45#,Q345,16Mn,25Mn,27SiM
2.ID:50-250mm
3.Supply condition:BK+SDin2391 cold drawn seamless honed high precis

Commodity name: Stress relived multi using cold drawn ck20 tube

 

Yantai Xinpeng Steel Pipe Co,.Ltd. is one of the best suppliers of the precision tube and hydraulic cylinder tube in North of China. Since 2002 Cold drawn machine set importing, Xinpeng become a big precision steel pipe manufacture with 500Mt month productivity in the next 12 years.

Products widely used in the hydraulic cylinder of the heavy machinery, Cranes, excavator, forklifts and the Petrol industry.

1. Hydraulic Cylinder Tube------Main products of Xinpeng,

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 work and get the mechanical property of the clients need and extended the life of the hydraulic cylinder.

1. SRB tube ----- used in Elevatorbuffer and Hydraulic Cylinder .This kind tube have a better roughness inner the tube, ra0.2-0.4um and can use directly in the hydraulic cylinder tube. Range: ID 50-250mm and Length can work at most 6M.
2. Cold finished tube---- Widely Used. Processing range 30-300mm, biggest length is 11M.

Xinpeng Have passed ISo9001 verified from 2008; each tube of ours is strictly in quality control that can assure the product quality of Xinpeng.

Parameter:

 

1.Raw material:20#.45#,Q345,16Mn,25Mn,27SiMn,42CrMo,etc cold drawn seamless pipes

2.ID:50-250mm

 

3.ID tolerance:H8,H9   

 

4.Surface roughness:Ra 0.02—0.4μm

 

5. Final supply condition:cold drawn and stress-relieved(BK+S)

 

6. Machining allowance:0.5-1.5mm

 

7.Wall thickness:10%×ID

 

Xinpeng Have passed ISo9001 verified from 2008; each tube of ours is strictly in quality control that can assure the product quality of Xinpeng.

Technique Parameter

 

For Honed /SRB tube standard Tolerance

ID size	ID deviation (mm)
	H7	H8	H9	H10
30	+0.021     0	+0.033   0	+0.052   0	+0.084   0
>30~50	+0.025     0	+0.039   0	+0.062   0	+0.100   0
>50~80	+0.030     0	+0.046   0	+0.074   0	+0.120   0
>80~120	+0.035         0	+0.054   0	+0.087     0	+0.140   0
>120~180	+0.040     0	+0.063   0	+0.100   0	+0.160   0
>180~250	+0.046     0	+0.072   0	+0.115   0	+0.185   0
>250~315	+0.052     0	+0.081   0	+0.130   0	+0.210   0
>315~400	+0.0527   0	+0.089   0	+0.140   0	+0.230       0

Material Range of Yantai Xinpeng

Steel Grade
DIN	1629	ST 37 / 44 / 52
	1630	ST 37.4 / 44.4 / 52.4
	2391-2	ST 35 /  45 / 52
EN	17204	C22 – Ck 22 – Cm22 – C35 – Ck 35 – Cm 35 C45 -  Ck 45 – Cm 45 – 34 CrMo4
	17210	C15 – Ck 15 – Cm 15 – 16MnCr5
	10305-1	E215/235/355/255
GB	3639	10#, 20#, 16Mn, 45#
ASTM	A 519	1010 1020 1035
	A179-A450	A450
	A822-A450	A450
BS	BS 6323	CFS3 CFS4 CFS5   CFS6 CFS7
NFA	49310	TU 37 b TU 52  XC

 

Delivery conditions:  

Precision tubes are delivered in following conditions 

BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after last cold forming process.
BKW (+LC)  Cold finished/soft 
After last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are stress relieve annealed.
GBK (+A) Annealed.
After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized.
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere. 

Tests: 100% eddy current test, chemical and mechanical inspection, size checking and others

 

 

Management System Certification:

 

Production Process:

• Pretreatment :  Acid cleaning- Parkerizing

 

• Cold drawn/Cold rolled

• Annealing furnace—— Stress-relieving (+SR)

• Straightener—— Straightening/ Leveling

•  Straightness Inspecting

• Dimension Inspecting

 

• Sawing off not good parts

 

• Lathe

• Surface Polishing

 

Application:

 

widely used in hydraulic system with precision steel tube, injection molding machine with precision steel tube, hydraulic press with precision steel tube, shipbuilding with steel tube, EVA foaming, hydraulic machinery, hydraulic cutting machine, shoe making machinery, hydraulic equipment, high pressure tubing, hydraulic tubing, card sets of joints, pipe joints, rubber machinery, forging machinery, casting machinery, engineering machiner...

 

 

 

 

 

 

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