We manufacture both machined E355 hollow bar and cold drawn E355 hollow bar with plain ends for various application like hydraulic cylinders,mechanical structural use,etc.
Commodity:E355 hollow bar
Manufacture method: hydraulic cold drawn, machined
End finish: plain ends or machined and threaded ends.
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.