Commodity: DIN2391-2 seamless honed cylinder tubing

Standard specification&material: DIN2391-2 ST52,ASTM A519 AISI1020,AISI1026,AISI1045,AISI4130,AISI4140, EN10305-1 E355,C45E,25CrMo4,42CrMo4,etc.

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

Manufacture method: cold rolled, hydraulic cold drawn, cold rollled

Delivery condition: 

Internal surface treatment method: honing or skiving and roller burnishing

OD tolerance: as per DIN2391-1

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

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

Bore roughness(Ra): 0.35um max for honed tubes, 0.25um max for skived&roller burnished 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.

External machining or external polishing service can be provided.  

End machining service can be provided.

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.