CK45 Honed Hydraulic Skived And Roller Burnished SRB Tubes For Hydraulic Equipment
CK45 C20 Q355B E355(ST52) SAE1026 Honed Hydraulic Tube Skived and Roller Burnished Tube (SRB Tubes) for Hydraulic Equipment
Material and Specification
Honed hydraulic tubes, particularly those that are skived and roller burnished (SRB), are essential components in hydraulic equipment. These tubes, such as the CK45, C20, Q355B, E355(ST52), and SAE1026, are known for their impeccable surface finishes and tightly controlled dimensional tolerances. They are ideal for applications that require high pressure and minimal friction. These tubes are manufactured to meet rigorous specifications, ensuring their reliability and durability in demanding environments.
Key Features
- Precision Manufacturing: SRB tubes are processed through skiving and roller burnishing, which provides a mirror-like surface finish and enhances the fatigue resistance of the tubes.
- Tightly Controlled Tolerances: The manufacture of these tubes involves precise dimension control to ensure consistent performance.
- High Corrosion Resistance: Depending on the material, these tubes can offer excellent resistance to corrosion, prolonging their service life.
- Excellent Mechanical Properties: They demonstrate superb tensile strength and toughness, making them suitable for high-pressure environments.
Chemical Composition
Here's a tabular representation of the chemical compositions for these steel grades:
| Grade | C (%) | Mn (%) | Si (%) | P (%) | S (%) | Cr (%) | Mo (%) | Ni (%) |
|---|---|---|---|---|---|---|---|---|
| CK45 | 0.42-0.50 | 0.50-0.80 | 0.10-0.40 | ≤0.040 | ≤0.040 | - | - | - |
| C20 | 0.17-0.23 | 0.30-0.60 | ≤0.40 | ≤0.045 | ≤0.045 | - | - | - |
| Q355B | ≤0.20 | 1.0-1.7 | ≤0.55 | ≤0.030 | ≤0.030 | ≤0.30 | ≤0.10 | ≤0.70 |
| E355(ST52) | ≤0.22 | 1.30-1.60 | ≤0.55 | ≤0.025 | ≤0.025 | - | - | - |
| SAE1026 | 0.22-0.28 | 0.60-0.90 | 0.15-0.35 | ≤0.040 | ≤0.050 | - | - | - |
Mechanical Properties
The mechanical properties of these materials are critical for their performance in hydraulic systems. Below is a summary:
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| CK45 | ≥310 | 570-700 | ≥16 | 156-207 |
| C20 | 290 | 440-580 | ≥23 | - |
| Q355B | ≥345 | 470-630 | ≥21 | - |
| E355(ST52) | ≥355 | 490-630 | ≥20 | 160-210 |
| SAE1026 | ≥275 | 440-670 | ≥25 | 163-220 |
Similar Standards and Steel Grades
To assist in global applications, here is a comparison of these materials to various international standards.
| Standard System | CK45 | C20 | Q355B | E355(ST52) | SAE1026 |
|---|---|---|---|---|---|
| ASTM | AISI 1045 | AISI 1020 | A572 Grade 50 | A513 Type 5 | A519 1026 |
| EN | C45 | C22 | S355J2 | E355 | - |
| GOST | 45 | 20 | - | 20 | - |
| JIS | S45C | S20C | SM490 | - | - |
| GB | 45# | 20# | Q355B | - | - |
Application
Honed SRB tubes find extensive use in hydraulic equipment, including:
- Hydraulic Cylinders: They are the core components, ensuring smooth motion and reduced wear and tear.
- Industrial Machinery: Used in both stationary and mobile machinery, offering reliability and efficiency.
- Automotive Systems: As part of the hydraulic systems in various vehicles, ensuring safety and performance.
- Aerospace: Critical for actuators and landing gear systems where minimal friction and high precision are essential.
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