DIN 2391 seamless honed tube is a kind of precision seamless tubes with perfect internal surface and tight ID tolerance used to produce cylinder barrels. In Changzhou Chengxin,we manufacture hydraulic cold drawn seamless tubes ready to hone, honed tubes, and skived&roller burnished tubes upto 325mm*300mm.

Commodity: DIN 2391 seamless honed tube

Standard specification and material:DIN 2391-2 ST52,ST52.3,ST52.4,EN 10305-1 E355,C45E,25CrMo4,34CrMo4,42CrMo4, ASTM A519 SAE1020,SAE1026,SAE1045,SAE4130,SAE4140, and other carbon steel and alloy steel.

Size range:40mm*30mm-480mm*450mm

Manufacture method: cold rolled, hydraulic cold drawn

Delivery condition: BK,BKW,BK+S,GBK,NBK.

Internal surface treatment method: honing or skiving and roller burnishing

OD tolerance: as per DIN2391-1, EN10305-1, or ASTM A519

ID tolerance of honed tubes or skived and roller burnished tubes: H7,8,H9,H10 or given by customer.

Wall thickness tolerance (eccentricity): +/-5%

Roughness of internal surface(Ra): 0.25um max for skived and roller burnished tubes, 0.4um max for honed tubes

Packing: in bundles tied with steel strips.

Slightly internal and external oil coating.

End plastic caps covering both ends.

Marking: to be confirmed.

Based on our manufacturing facilities, the following services are available:

1. Honing

2. SKiving&Roller burnishing

3. Grinding

4. Machining

5. Welding

6. Threading

7. Polishing

We are ISO9001-2008 certified manufacturer of hydraulic cylinder tubes and cylinder barrels.  

Payment method: 30% deposit,balance before shipment or against copy of B/L or L/C at sight.

MOQ: 4 tons for each size.

Warranty: 1 year after shipment of tubes.

Third party inspection or customer's inspection is acceptable.

Addtional tests or inspections like hardness test,grain size test,metallical phase test,ultrasonic test is available.