Commodity: ASTM A519 roller burnished cylinder tube

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

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

Manufacture method: cold rolled, hydraulic cold drawn

Delivery condition: 

Internal surface treatment method: honing

OD tolerance: as per EN10305-1

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

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

Bore roughness(Ra): 0.35um max.

Chemical composition:

Mechanical properties:

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.

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

1. Internal honing or skiving&roller burnishing

2. External surface polishing

3. External surface machining

4. Inernal threading

We are ISO9001-2008 certified manufacturer of hydraulic cylinder tubes including cold drawn seamless precision steel tubes suitable for honing, honed tubes, skived and roller burnished tubes, as well as cylinder barrels.

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 years aftre receipt of tubes.  

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

Third party inspection or customer's inspection are both acceptable.