ST52 Chrome Plated Tube
ST52 Chrome Plated Tube
ST52 chrome plated tubes are precision-engineered tubes made from high-strength ST52 steel with a hard chrome-plated surface. These tubes are widely used in hydraulic and pneumatic systems where durability, corrosion resistance, and smooth operation are critical.
Advantages
1. Exceptional Wear Resistance:The hard chrome plating (20-50μm thick) provides a surface hardness of 800-1000 HV (Rockwell C 65-70), significantly reducing wear from friction and abrasive particles.Extends the service life of hydraulic cylinders, minimizing frequent replacements.
2. Superior Corrosion Protection: The chrome layer acts as a barrier against moisture, chemicals, and oxidation, making these tubes ideal for harsh environments (marine, industrial, and agricultural applications).More cost-effective than stainless steel while offering comparable corrosion resistance.
3. Low Friction & Smooth Surface Finish: The polished chrome surface (Ra 0.1-0.4μm) ensures smooth piston movement, reducing energy loss and improving efficiency.Enhances seal performance, preventing leaks and reducing maintenance needs.
4. High Strength & Load-Bearing Capacity: ST52 chrome plated tube is made from ST52 steel, which has a high yield strength and tensile strength.Suitable for heavy-duty applications in construction, mining, and industrial machinery.
5. Cost-Effective & Low Maintenance: Longer lifespan than unplated or painted tubes, reducing downtime and replacement costs.
6. Versatility: Suitable for a wide range of applications, including hydraulic cylinders, pneumatic cylinders, and precision engineering components.
Material Composition
| Element | Composition |
|---|---|
| Carbon (C) | ≤ 0.22% |
| Silicon (Si) | ≤ 0.55% |
| Manganese (Mn) | 1.00 – 1.60% |
| Phosphorus (P) | ≤ 0.025% |
| Sulfur (S) | ≤ 0.025% |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength | ≥ 355 MPa |
| Tensile Strength | 490-630 MPa |
| Elongation | ≥ 22% |
Delivery Conditions
| Designation | Symbol | Description |
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming and thus have a rather high resistance to deformation. |
| Cold finished (soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation.Appropriate further processing allows a certain degree of cold forming(e.g.bending,expanding). |
| Cold finished and stress-relieved | BKS | Heat treatment is applied following the last cold forming process.Subject to appropriate processing conditionsthe increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK | The last cold forming process is followed by annealing in a controlled atmosphere |
| Normalized | NBK | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
Delivery Condition: SR,BK, BK+S, GBK, NBK
ID Size : 20mm – 1500mm
Length: max 16m
Chrome Thickness: 20-100Micron
Type: Seamless, Hot Rolled, Cold Rolled, Cold Drawn
Straightness: ≤ 0.5/1000
Roughness: 0.2-0.4 u
Tolerance EXT: DIN2391, EN10305, GB/T 1619,GOST 8731,GOST 1050,GOST4543
Tolerance INT: H7,H8,H9
Protection: Anti-rust oil on inside and outside surface, plastic caps in both ends.
Packing: Bundle with steel strip and PE sheet or Plywood case
