E355 Honed Tube For Hydraulic Cylinders — Specifications, Tolerances & Applications

E355 honed tubes are precision‑engineered seamless steel tubes manufactured from high‑strength E355 carbon steel, optimized for performance in hydraulic cylinders and high‑pressure fluid systems. They are cold drawn and honed (or skived & roller burnished) to ensure ultra‑smooth internal surfaces, tight dimensional control, and long service life. These tubes are ideally suited for heavy‑duty machinery, construction equipment, material handling systems, and industrial hydraulics.

Material & Mechanical Properties

Steel Grade: E355 (EN 10305‑1) / equivalent ST52‑3 BK+S material

Heat Treatment: +SR (Stress Relieved, normalized)

Tensile Strength (Rm): ≥ 580 MPa / ≥ 600 MPa depending on supplier finish and process

Yield Strength (Rp0.2): ≥ 435 MPa / ≥ 490 MPa typical

Elongation: ≥ 10 % minimum

Dimensional Range

Inside Diameter (ID): ~30 mm – up to ~500 mm (varies by producer)

Outside Diameter (OD): ~40 mm – ~480+ mm

Wall Thickness: ~2 mm – ~40 mm depending on size and customer spec

Length: Standard 3 m – 9 m (cut‑to‑length options available)

Inner Diameter (ID) Tolerance - ISO System

Precision honed tubes are typically supplied in tight tolerance classes (based on ISO fits):

Typical tolerance values (ID range example H8):

30–50 mm: +0 /+0.039 mm

50–80 mm: +0 /+0.046 mm

80–120 mm: +0 /+0.054 mm

Larger diameters scale accordingly

Surface Roughness & Finish

Inside Surface Roughness: Ra ≤ 0.2 – 0.4 µm (ultra‑smooth honed finish)

Straightness: Typically ≤ 1 mm per 1 000 mm length

Outside Surface: Smooth cold drawn finish, ready for further processing if needed

High Dimensional Accuracy - excellent tolerance control for ID and wall thickness.

Ultra‑Smooth Internal Bore - low roughness for superior sealing and reduced friction.

Enhanced Durability - cold drawing and stress relieving improve strength and service life.

Wide Size Availability - broad diameter and length options for diverse applications.

Compatibility with Seals & Pistons - ideal bore quality for O‑rings, U‑cups, and piston seals.

E355 honed tubes are widely used as cylinder barrels and precision components in:

Hydraulic cylinders (construction, agriculture, industrial machinery)

Pneumatic cylinders and actuators

Lift equipment, forklifts and aerial platforms

Material handling machinery

Heavy‑duty industrial presses and automation systems

Manufacturing Standards: EN, DIN, JIS, ASTM compatibility for global markets.

Inspection: ID/OD measurement, surface finish, straightness, and tolerance verification.

Packaging: Oiled inside/outside, plastic end caps, bundled or crated for export.

Q1: What is an E355 honed tube?
A: E355 honed tube is a precision cold‑drawn seamless steel tube made from E355 carbon steel (EN 10305‑1 / ST52‑3 equivalent), with an ultra‑smooth internal bore achieved by honing or skiving & roller burnishing. It is designed primarily for hydraulic cylinder barrels and other high‑pressure applications.

Q2: What are the key mechanical properties of E355 honed tubes?
A: Typical properties include:

Tensile Strength (Rm): ≥ 580–600 MPa

Yield Strength (Rp0.2): ≥ 435–490 MPa

Elongation: ≥ 10 %

Hardness: HB 170–220 depending on heat treatment

Q3: What diameters and wall thicknesses are available?
A: Standard ranges:

Inside Diameter (ID): 30 mm – 500 mm

Outside Diameter (OD): 40 mm – 480 mm

Wall Thickness: 2 mm – 40 mm
Custom sizes can also be manufactured according to customer requirements.

Q4: What tolerances are offered?
A: Tolerances depend on ISO classes:

H7: High precision

H8: Common for hydraulic applications

H9: Standard tolerance
Example H8: ID 30–50 mm → +0/+0.039 mm; ID 50–80 mm → +0/+0.046 mm.

Q5: What surface finish is provided?
A: Inside surface roughness Ra ≤ 0.2–0.4 µm for minimal friction and seal compatibility. Outside is smooth cold‑drawn finish, ready for further machining or plating.

Q6: What applications are E355 honed tubes used for?
A: Common uses include:

Hydraulic cylinders for construction and industrial machinery

Pneumatic actuators and presses

Lift and handling equipment

Material handling systems and automation

Q7: Can the tubes be chrome-plated?
A: Yes. The ID can be chrome-plated after honing to increase corrosion resistance and extend service life.

Q8: What's the difference between honed and SRB (skived & roller burnished) tubes?
A: Honing uses abrasive stones to smooth the bore, while SRB mechanically skives and rolls the ID for even tighter tolerances, smoother surface, and improved fatigue resistance.

Q9: What is the standard length for E355 honed tubes?
A: Standard lengths are 3 m – 9 m, but custom cut lengths are available to meet specific project requirements.

Q10: How are the tubes inspected for quality?
A: Inspection includes:

Dimensional measurement (ID, OD, wall thickness)

Straightness

Surface roughness

Mechanical testing (tensile, yield, elongation)

Visual and NDT (optional) verification

Q11: Are E355 honed tubes suitable for high-pressure hydraulics?
A: Yes, with proper wall thickness and surface finish, E355 honed tubes are widely used in high-pressure hydraulic cylinders and meet global standards for strength and durability.

Q12: Can you supply export packaging for these tubes?
A: Yes. Tubes are oiled, capped, bundled, or crated to prevent corrosion and damage during shipping. Custom export packaging is also available.

How To Cooperate With Us?

Your Trusted Supplier of E355 Honed Tubes for Hydraulic Cylinders

Our address

Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province

Phone Number

+86 15769214734

E-mail

office@dongmjd.com