Specifications

Manufacture method:machining
Material:St52,SAE4140
Delivery condition: as rolled
Size(ID):40mm*280mm
Length:2800mm max

We manufacture both machined hollow bar and cold drawn hollow bar with plain ends for various application like hydraulic cylinders,mechanical structural use,etc.

Commodity:  sae4140 alloy steel hollow piston rod

Manufacture method: hydraulic cold drawn, machined

Size range: 12mm - 400mm (OD), Length: 3000mm max.

Material: ST52 or other carbon steel grades like CK45,S45C, alloy steel like SAE4140, 42CrMo4,20MnV6,etc.

Delivery condition: cold drawn, stress relieved,Q+T,hard chrome plated.

Chemical composition:

Element	C	Si	Mn	P	S
Content (%)	0.21 max	0.55 max	1.60 max	0.025 max	0.025 max

Further treatment:

We can manufacture both cold drawn hollow bar with plain ends and machined hollow bar in accordance with drawings or design.

 

 

FOR COLD DRWAN ROUND BARS (+C):

Size range: 60mm-325mm (Diameter), Length: 12800mm.

OD tolerance:

D<100mm	+/-0.35mm
100mm<D<200mm	+/-0.50mm
200mm<D<325mm	+/-0.75mm

Straightness:

L<3000mm	0.5mm/1000mm max
3000mm<L<5000mm	0.8mm/1000mm max
L>5000mm	1.2mm-2.0mm/1000mm max

 

FOR COLD DRAWN ROUND BARS (+SR):

Size range: 60mm-325mm (Diameter), Length: 12800mm.

OD tolerance:

D<100mm	+/-0.40mm
100mm<D<200mm	+/-0.60mm
200mm<D<325mm	+/-0.80mm

Straightness:

L<3000mm	0.5mm/1000mm max
3000mm<L<5000mm	0.8mm/1000mm max
L>5000mm	1.2mm-2.0mm/1000mm max

Packing: we will ensure seperate seaworthy packing for piston rods.  

Shipping: by containers.

 

External machining or grinding, internal honing, internal threading,hard chrome plating,.

We are ISO9001-2008 certified manufacturer of tubes and hollow piston rods for hydraulic cylinders and hydraulic cylinder barrels.

Payment method: 30% deposit,balance before shipment or against copy of B/L or L/C at sight.

Delivery time: within 50 days.

MOQ: 3 tons for each size.

Trade term: FOB,CFR,CIF,DAP.

Third party inspection or customer's inspection is acceptable.