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Honed Tubes for Hydraulic Cylinders: Material, Specification, Key Features
Introduction
Honed tubes are an essential component in hydraulic cylinders, used extensively in various industries for their durability and high-performance qualities. This article explores the material, specification, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades of honed tubes.
Material and Specification
Honed tubes are primarily manufactured from low carbon steel, such as ST52.3, E355, and SAE 1020. These materials have excellent machinability and can withstand high internal pressures. The tubes undergo precision honing, resulting in a smooth interior surface finish with tight dimensional tolerances.
The standard size range of honed tubes varies widely, usually starting from an internal diameter (ID) of 40mm and going up to 500mm. Wall thicknesses typically range from 5mm to 50 mm. However, specific requirements can be met through customization.
Key Features
Honed tubes offer several key features that make them highly desirable for hydraulic cylinder applications:
Superior Surface Finish: The honing process ensures a surface finish of Ra ≤ 0.2 microns, providing reduced friction and enhanced sealing capabilities.
High Straightness: Honed tubes exhibit excellent straightness, enabling precise and stable cylinder operation.
Tight Tolerances: These tubes are manufactured to stringent dimensional tolerances, ensuring a perfect fit and ease of assembly.
High Strength: Honed tubes possess excellent mechanical properties, making them capable of withstanding heavy loads and high pressures.
Chemical Composition
The following table presents the chemical composition of commonly used honed tube materials:
| Steel Grade | C% max | Si% max | Mn% max | P% max | S% max |
| ST52.3 | 0.22 | 0.55 | 1.60 | 0.040 | 0.040 |
| E355 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 |
| SAE 1020 | 0.18-0.23 | - | 0.30-0.60 | 0.040 | 0.050 |
Mechanical Properties
The mechanical properties of honed tube materials play a crucial role in their selection and application. The following table showcases the typical mechanical properties of commonly used steel grades:
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
| ST52.3 | 355 | 490-630 | 22 |
| E355 | 355 | 490-630 | 22 |
| SAE 1020 | 275 | 410-660 | 20 |
Steel Grade and Application
Honed tubes are predominantly available in ST52.3 and E355 grades due to their excellent mechanical properties and wide application possibilities. These tubes find extensive use in industries such as:
Hydraulic and pneumatic cylinders
Construction and mining equipment
Agricultural machinery
Material handling systems
Automotive industry
Manufacturing and processing equipment
Possible Alternative Grades
Although ST52.3 and E355 are the most commonly used steel grades for honed tubes, other alternative materials can be employed based on specific applications. Some possible alternatives include:
CK45: Offers excellent weldability and machinability, suitable for general hydraulic cylinder applications.
4140: Known for its high strength and wear resistance, ideal for heavy-duty applications.
316 stainless steel: Provides superior corrosion resistance, suitable for pneumatic and hydraulic applications in corrosive environments.
We can easily state with absolute certainty that for such good quality at such charges we are the lowest around for DIN2391 Seamless Steel Hydraulic Honed Tube. The company will be based on honesty, quality as life, innovation and development as the guide, and customer satisfaction as the goal of continuous efforts. Welcome new and old customers at home and abroad to visit, cooperate and guide. We are fully aware that the construction of the corporate culture should not be a mere formality, but should be carried out, as it will have a direct impact on the future of the business.
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