Commodity: 4140 hydraulic seamless honed steel tubing

Standard specification&material: EN10305-1 E355,E410,E460,25CrMo4,34CrMo4,42CrMo4,DIN2391-2 ST52,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: rough honing

OD tolerance: as per DIN2391-1

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

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

Bore roughness(Ra): 0.4um max.

Chemical composition requirement of SAE1026 material:

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.

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.