Seamless steel tube for hydraulic cylinder is a kind of precision seamless steel pipe with clean and smooth bore used to produce hydraulic cylinder barrels. We manufacture seamless steel tube for hydraulic cylinder including cold drawn seamless steel tube suitable for honing or skiving&roller burnishing,honed tubes, and skived&roller burnished tubes from 40mm*30mm to 325mm*300mm and the steel grade can be DIN2391-2 ST52,EN10305-1 E355,C45E,25CrMo4, 34CrMo4, 42CrMo4,ASTM A519 SAE1020,SAE1026,SAE1045,SAE4130,SAE4140,etc.

Commodity: seamless steel tube for hydraulic cylinder

Type: cold rolled or cold drawn seamless stee tube suitable for honing,honed tubes, skived and roller burnished tubes.

Raw material: high quality hot rolled seamless steel pipe

Standard&steel grade: DIN2391-2 St52,EN10305-1 E355,C45E,25CrMo4,34CrMo4,42CrMo4,ASTM A519 SAE1020,SAE1026, SAE1045,SAE4130,SAE4140,etc.

Size range: 40mm*30mm-325mm*300mm

Manufacture method:hydraulic cold drawn, hydraulic cold drawn + cold rolled.

Delivery condition:

TECHNICAL PRFORMANCE:

1.  For cold drawn seamlss steel pipe suitable for honing:

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

ID tolerance: appointed by buyer. We suggest -0.5mm/-0.8mm for honing, an -0.6mm/-0.9mm for skiving&roller burnishing.

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

Straightness: 0.5mm/1000mm max, 0.8mm/1000mm max, 1.2mm/1000mm max depending on dfferent length and size.

2. For honed tubes:

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

ID tolerance: H8,H9,H10 or appointed by buyer.

Bore roughness(Ra): 0.35um max

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

Straightness: 0.5mm/1000mm max, 0.8mm/1000mm max, 1.2mm/1000mm max depending on dfferent length and size.

3.For skived&roller burnished tubes:

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

ID tolerance: H7,H8,H9,H10 or appointed by buyer.

Bore roughness(Ra): 0.25um max

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

Straightness: 0.5mm/1000mm max, 0.8mm/1000mm max, 1.2mm/1000mm max depending on dfferent length and size.

Packing: in budles tied with stee strips.

Sightly internal&external oil coating for anti-rust protection.

End plastic caps covering both ends.

Marking on each piece of tube: to be confirmed.

Shipping: by containers.

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

1. Internal surface honing or skiving&roller burnishing.

2. External surface polishing

3. External surface machining.

4. Internal threading

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

Payment method: we accept payment methods like T/T, L/C,D/P.

MOQ: 4 tons for each size. Smaller quantities can be negotiated for supply.

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

Third party inspection by SGS,BV or customer's inspection are both acceptable.  

Invoicing: based on actual weight or theoretical weight at buyer's option.