DIN2391 ST52 Precision Seamless Honed Steel Pipe

Precision Seamless Hydraulic Cylinder H8 Honed Steel Tube

honed tube |SRB /honing tube

The hydraulic cylinder tube is the main part of the hydraulic cylinder.The inner hole of the hydraulic cylinder tube usually precision processed by boring,reaming,rolling or honing.By these process can ensure the piston,sealing elements and the support elements move smoothly,then ensure the sealing effect and reduce the abrasion.The hydraulic cylinder tube will bear big pressure,so need high strength and stiffness.

(honing tube) precision tube.
Main materials: 20#, Q235, 20G, 35#, 45#, 16Mn, Q345, 40Cr, 27SiMn, 12Cr1MoV, 10CrMo910, 15CrMo, 35CrMo, 42CrMo.Widely used: engineering machinery, metallurgical machinery, plastic machinery, opening and closing machinery, mining machinery, road construction machinery, textile machinery and other industries.1. Cold rolling 2. Cold drawing 3. Honing.

SRB tube (skived rolled burnished)

1, the processing time is greatly shortened. The pipe that honed 30 minutes before is rolled out in a few minutes.
2, the surfurface hardness of the roller is harder than the surface of honing, and it also improves the service life.

3, the finish of the processing surface is improvedace h.
4, the processing cost is saved. After honing and grinding, the grinding is made of mud. The remaining materials are filamentous and can be recovered later.

Hydraulic cylinder tube is a kind of after cold rolledprocessing of a kind of high precision steel tube. Precision seamless steel tube wall inside and outside are without oxidation layers, under high pressure without lea, high precision, high finish, cold bending deformation, flaring, flattening without cracks, etc. It is mainly used to produce pneumatic or hydraulic components products.

The difference between precision steel pipe and Mild seamless pipe:

1. The seamless steel tube with obvious difference is that dimensional accuracy can be up to 0.1mm.

2. High precision steel pipe diameter surface finish, the customer without processing can be used directly and ordinary seamless steel tube to the customer and lather, polishing processing.

3. The smaller outer diameter.

4. High precision to do small batch production surface quality

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

3.  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: 25-35days 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 3MT)
Price item: FOB, CFR, CNF, C&F, CIF
Origin: China
Third party inspection: BV, SGS, Lloyds. The Expense needs to stand by clients.

About our service:

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

2. Payment：30% deposit, 70% balance before shipment. L/C at sight.

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!