Pneumatic cylinder and Hydraulic using cold rolling tube

Specifications

Pneumatic cylinder and Hydraulic using cold rolling tube
1. Moq:20Mt
2. fast shipment
3. supply condition : B BKs BKW GBK NB

Commodity name:  Pneumatic cylinder and Hydraulic using cold rolling tube

We offer an extensive range of seamless precision steel tubes. The seamless precision steel tubes can be used for a wide range of precision mechanical spare for car and cylinder accord to standard DIN2391/ EN10305-1/ GB/T3639-2009.

Processing: Cold drawn or cold rolled (Burnish or other requirements can be agreed)

Length: ≤10m

Straightness:0.3~0.8mm/m

Wall Thickness tolerance: ±10%

Inner roughness: 0.8~1.6μm

Dimensional Accuracy:

1. Tolerance on Inner Diameter: H8  H9

2. Tolerance on Wall Thickness:

Diameter: >40 +/-0.2mm

Diameter: 40 <100 +/-0.3mm

Diameter >100 +/-0.5mm

3. Surface Roughness: a=0.3~0.4micron

Length: Random length4.5-6m or as per order confirmation

Mill Test Certification: En10204/3.1B

4. Delivery condition: BKS

 Main products of Yantai Xinpeng Steel Pipe Co,.Ltd

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.

2.SRB tube ----- used inElevatorbuffer 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.

 3. 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.

 

Specifiation: 

Standard	DIN2391, DIN2445, EN10305, GB/T 3639, GB 8713
Grade	ST35(E235), ST37, ST24(E255), ST52(E355), 10#, 20#, 35#, 45#
O.D.	4.0MM-400MM
W.T.	0.5MM-18MM
Surface Treatment	bare, varnished,oiled, anti-corrosion coating as request
Packing	1. bundle packing 2. marking as per customer's requests 3. paint on the pipe as per customer request 4. pipe caps as customer request
Condirion of Delivery	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, threfore small steel pipe plasticly, the plasticly 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 again

hydraulic cylinder tube st52 din2391

Some Demension:

OD x WT	OD x WT	OD x WT	OD x WT
4*0.5	16*0.5	26*1.8	35*9.0
4*0.8	16*0.8	26*2.0	35*10
4*1.0	16*1.0	26*2.2	38*0.5
4*1.2	16*1.2	26*2.5	38*0.8
5*0.5	16*1.5	26*2.8	38*1.0
5*0.8	16*1.8	26*3.0	38*1.2
48*5.0	70*2.8	90*10	130*14
48*5.5	70*3.0	90*12	130*16
48*6.0	70*3.5	90*14	130*18
48*7.0	70*4.0	90*16	140*2.5
48*8.0	70*4.5	95*2.0	140*2.8
48*9.0	70*5.0	95*2.2	140*3.0

Tolerance in Dimension:

OD	GB/T3639(GB8713)	DIN2391(EN10305)	Our Tolerence	Best Quality
4-30mm	±0.10mm	±0.08mm	±0.05mm	±0.02mm
31-40mm	±0.15mm	±0.15mm	±0.05mm	±0.03mm
41-50mm	±0.20mm	±0.20mm	±0.05mm	±0.03mm
51-60mm	±0.25mm	±0.25mm	±0.08mm	±0.03mm
61-70mm	±0.30mm	±0.30mm	±0.10mm	±0.05mm
71-160mm	±0.30mm	±0.30mm	±0.10mm	±0.05mm
Tolerance in WT	±0.12mm	±0.10mm	±0.05mm	±0.03mm
Process	Diameter	Length	Precision	Inner Hole Roughness
Cold Rolled	30-100mm	≤12 m	H8-H10	0.4-1.6
Cold Draw	30-250mm	≤12 m	H8-H10	0.8-1.6
Honing	40-500mm	≤12 m	H8-H9	0.4-0.8
Rolling	40-400mm	≤7 m	H8	0.4
Inner Diameter	H8	H9	H10
30mm	±0.033	±0.052	±0.084	5-30mm
30-50mm	±0.039	±0.062	±0.100	±0.080
50-80mm	±0.046	±0.074	±0.120
80-120mm	±0.054	±0.087	±0.140
120-180mm	±0.063	±0.100	±0.160
180-250mm	±0.072	±0.115	±0.185
250-315mm	±0.081	±0.130	±0.210
315-400mm	±0.089	±0.140	±0.230

hydraulic cylinder tube st52 din2391

Mechanical Properties: 

Condition	Materail Grade	T.S (MPa)	Y.S (MPa)	Elongation(%)
BKS	ST35 (10#)	≥420	≥315	≥14
BKS	ST45(20#)	≥520	≥375	≥12
BKS	ST52(16Mn)	≥580	≥420	≥10
GBK	ST35 (10#)	≥315		≥35
GBK	ST45(20#)	≥390		≥32
GBK	ST52(16Mn)	≥490		≥30
NBK	ST35 (10#)	340-470	≥235	≥32
NBK	ST45(20#)	440-570	≥255	≥30
NBK	ST52(16Mn)	490-630	≥335	≥28

Delivey conditions:

 

• Standard packing with plastic caps and strapped bundles.
• Commercial length 2000~10500mm,custom lengths upon request
• Surface protection

We can supply cold drawn/cold rolled seamless tube,honed tube,hydraulic tube,please feel free to contact us.

 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

Testing

package

 Finished products 

 

 

• Application:

  hydraulic cylinder tube st52 din2391 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 machinery, automotive high pressure steel pipe concrete pump, sanitation vehicle, automobile industry, shipbuilding industry, metal processing, military industry, diesel engine, the internal combustion engine, air compressor, construction machinery, forestrymachinery, etc.

 

About our service:

1. Cargo track service during transporting and feedback service after cargo is loaded on board

2. Flexible terms of payment by

3. Big discount for repeat customers

4. Smooth delivering procedure

5. Payment Terms: T/T , L/C And so on.

If there is any Question, please feel free to send us inquiry.

We will provide the professional Explanation.

We always do our Best!

 

 

Why you choose us as your best choice?

• Our quality is the top five in China. Raw material is mainly from some famous refinery steel mills, such as BAO STEEL, Tianjin, and Chengdu etc, which are the best and largest raw material manufacturers in China.
• we have been through ISO9001:2008 international quality system certification.
• Warranty period for our honed tubes and chrome bars is 2 years. For some special or important customers, the period is 5 years.
• All the orders, records of production and inspection would be kept for 5 years
• High Precision:

Honed tube (Roughness of tube is 0.2μm and straightness is less than 0.15/1000), piston rod (Plating thickness is 10-100 micron. Surface roughness is 0.2μm and straightness is also less than 0.15/1000)

Product details are completely according to International Standard, chrome rod and honed tube must be cut flatly, and no chrome marks on the surface of rod. (Most of domestic mills don’t do this in order to reduce cost)

 

• Delivery time is very fast. The average delivery time is 5-30 days after confirming the orders.
• Package:banding with steel strips, braiding parcel at outside
• Conservation: Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends.

The packaging process and other terms

Transportation: by sea
20' FCL (means the length than 5,800mm)
40' FCL (means the length than 11,800mm)
Bulk cargo (means the quantity is more than 200MT)
With regards to other length or quantity, it should be taken by clients themselves
Delivery time: 10-30days to the dispatch port after receipt of T/T or L/C at sight
Optional: wooden box; caps; vanished coating. Clients should pay for this fee
Payment: T/T or L/C at sight, T/T 100% in advance (the order less than 30MT)
Price item: FOB, CFR, CNF, C&F, CIF
Origin: China
Third party inspection: BV, SGS, Lloyds. The Expense need to stand by clients.

Finished Products