St52 Machined Steel Hollow Bar
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:St52 machined steel hollow bar
Manufacture method: machining, deep hole boring, drilling
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.

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.
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