hydraulic cylinder precision steel tube

Hydraulic cylinder precision steel tube is a kind of smooth bore precision seamless steel tube used to produce hydraulic cylinder barrels. The main advantages are high purity of material and very smooth bore with roughness(Ra) below 0.4um.

Commodity: hydraulic cylinder precision steel tube

Standard specification&material: DIN2391-2 ST52,ST45,EN10305-1 E355,C45E,25CrMo4,34CrMo4,42CrMo4,ASTM A519 SAE1020,SAE1026,SAE1045,SAE4130,SAE4140,etc.

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

Manufacture method: cold rolled, hydraulic cold drawn

Delivery condition: 

Internal surface treatment method: honing,skiving and roller burnishing

OD tolerance: as per EN10305-1 or DIN2391-1

ID tolerance: H7,H8,H9,H10 or given by customer.

W.T tolerance(eccentricity): +/-5%

Bore roughness(Ra): 0.25um max for skived and roller burnished tube, 0.4um max for honed tube.

Chemical composition requirement of E355 material:

Mechanical properties of E355 tubes:

Packing: tubes will be packed in bundles tied with steel strips. Slightly internal and external oil coating for anti-rust protection. End plastic caps. External packing by knit bags.

Marking on each piece of tube: to be confirmed.

Mechanical stamp on each piece of tube can be provided.

Shipping: by containers.

External machining or external polishing service can be provided.  

End machining service can be provided.

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

Every year,we manufcture 12000 tons of honed seamless tubing for hydraulic cylinder application including cold drawn seamless tubes suitable for honing, honed tubes, and skived and roller burnished tubes.

We have systematc manufacturing facilites including cold rolling machines,hydraulic cold drawing bench,honing machines,skiving and roller burnishing machines,deep hole drilling machines,etc.

Payment: 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 receipt of tubes.  

Trade term: FOB,CFR,CIF,or DAP.

Third party inspection or customer's inspection is acceptable.