Honed Carbon Steel Tube — Factory Direct Supplier | Huaxia-Steel

Honed carbon steel tubes are precision-machined tubes with a smooth internal surface finish, produced to tight dimensional tolerances for hydraulic cylinders, pneumatic cylinders, and precision mechanical applications. The honing process removes tool marks and improves surface finish, resulting in lower friction, better seal life, and consistent cylinder performance. Huaxia-Steel supplies honed carbon steel tubes in St52, E355, CK45, SAE 1020/1026, and custom grades, with IDs honed to H8/H9 tolerance and roughness Ra 0.2–0.8 µm.

Product Overview

Our honed tubes start as seamless or welded carbon steel tubes that are normalized or stress-relieved, then cold-drawn to close tolerances. The inside diameter is honed using abrasive stones to achieve the required surface finish and straightness. We can supply tubes as honed-only, or pre-skived and roller-burnished (SRB) for even finer finishes. Each tube is inspected for ID tolerance, roughness, straightness, and wall thickness, and is supplied with full material and dimensional certificates.

Specifications

Parameter	Details
Inside diameter (honed)	25 mm – 400 mm
Wall thickness	3 mm – 50 mm
Length	Up to 12 m; cut-to-length available
ID tolerance	H8, H9, or per customer drawing
Surface roughness (ID)	Ra 0.2 – 0.8 µm typical
Straightness	0.5 – 1.0 mm/m typical
Standards	DIN 2391, EN 10305-1, ASTM A519, JIS G3445
Materials	St52.3 / E355, CK45 / C45, SAE 1020/1026, 4140/42CrMo4 on request
Finish	Honed ID, oiled, plastic end caps

Dimensional Reference (selected sizes, St52/E355)

ID (mm)	OD (mm)	Wall (mm)	Weight (kg/m)
40	50	5.0	5.55
63	76	6.5	11.22
80	95	7.5	16.19
100	120	10.0	27.13
125	146	10.5	35.34
160	184	12.0	51.12
200	230	15.0	79.33

These are representative sizes. We can match customer drawings for ID, OD, wall, and tolerance. For chrome-plated rod and piston rod applications, we also supply induction-hardened rods matched to honed cylinder tubes.

Available Grades

St52.3 / E355: Low-carbon, high-strength seamless tube with excellent honing response. The default choice for hydraulic cylinders in Europe and many export markets.

CK45 / C45 / 1045: Medium-carbon steel for higher strength and wear resistance. Common for marine, agricultural, and heavy-duty cylinders.

SAE 1020 / 1026: Low-carbon steels for light-duty and welded cylinder barrels. Good weldability and machinability.

4140 / 42CrMo4: Alloy steel option for high-pressure, high-strength cylinders requiring quench-and-temper treatment.

Manufacturing Standards and Quality Control

Honed tubes are manufactured to DIN 2391, EN 10305-1, ASTM A519, or customer-specific drawings. Raw tubes are inspected for chemistry, mechanical properties, and dimensional accuracy. After honing, every tube is checked for ID tolerance using bore gauges, surface roughness using a profilometer, and straightness on a precision table. Optional tests include hydrostatic testing, ultrasonic testing, and eddy-current inspection.

Chemical and mechanical tests: per heat, per MTC.

Dimensional inspection: ID, OD, wall, length, straightness, ovality.

Surface finish: roughness Ra measured on ID surface.

Visual inspection: scoring, pits, rust, and end condition.

Pressure test: hydrostatic test optional on request.

Applications

Hydraulic cylinder barrels for construction, mining, and agriculture equipment

Pneumatic cylinders and actuators

Telescopic cylinders for dump trucks and trailers

Industrial presses and machine tools

Offshore and marine hydraulic systems

Automotive suspension and steering cylinders

Packaging and Shipping

Honed tubes are protected with rust-preventive oil and fitted with plastic or steel end caps to keep the bore clean. They are bundled with steel straps and wrapped in waterproof paper or plastic film. Long tubes are loaded in open-top containers or bulk shipment; shorter cut lengths can be packed in wooden crates. We ship FOB, CFR, CIF, or DAP according to customer requirements.