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High Quality 
Mature Technical 
Safe and 
High Strength and Durability
Our ST52 Steel /2 Inch Hydraulic Seamless Tube is engineered to meet the highest standards of strength and durability. With a yield strength of 355 MPa and a tensile strength of 510-680 MPa, you can be confident that our tube will handle your hydraulic applications with ease.
Corrosion Resistance
Our ST52 Steel /2 Inch Hydraulic Seamless Tube is designed to resist corrosion and withstand harsh, corrosive environments. This ensures that your hydraulic systems will function efficiently and reliably for a long time.
Precision Engineered
Our ST52 Steel /2 Inch Hydraulic Seamless Tube is precisely engineered to provide excellent performance in hydraulic systems. We take great care to ensure that our tubes meet the highest standards of quality and are ready to take on any hydraulic application.
Wide Range of Sizes
We offer a wide range of sizes to suit your specific hydraulic application needs. Our ST52 Steel /2 Inch Hydraulic Seamless Tube is available in a variety of lengths and diameters, ensuring that you get products that perfectly fit your requirements.
Applications of Hydraulic Seamless Tube
1. Hydraulic systems in heavy machinery and transportation vehicles.
2. Hydraulic cylinders and pressure vessels.
3. Mining and drilling equipment.
4. Agriculture equipment。
5. Fluid lifting and conveying applications.
Honed tube for hydraulic cylinder | ||
Standard | DIN2391, EN10305, JIS G3445, ASTM A519, GB/T 8713... | |
Material | ST45, ST52, E355, E355SR, STKM13C, SAE1026, 20#, Q235B, CK45... | |
Heat treatment | BK+S | |
Specification
| Outer diameter(mm) | Inner diameter(mm) |
50-300mm | 40-250 | |
I.D Tolerance | H8-H9 | |
Length | 3-9m (Customers usually choose the 4~5.8m) | |
Straightness | 1/1000 | |
ID roughness | RA 0.4micron(max) | |
Technology | Honed & SRB(SKIVED AND ROLLER BURNISHED ) | |
Scope | Honed tube for hydraulic cylinder, swivel crane, injection machine and construction machine application | |
Chemical Component:
Steel Grade | Chemical Composition (%) | |||||
C | Si | Mn | P | S | Cr | |
≤ | ||||||
St45 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.250 |
ST52(E355) | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 | 0.25 |
SAE1026 | 0.22-0.28 | 0.15-0.35 | 0.60-0.90 | 0.040 | 0.050 | / |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 | 0.300 |
20# | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.250 |
Mechanical Properties
Delivery condition | BKS Cold Drawn & Stress-Relieved | ||
Steel Grade | Rm MPa | ReH MPa | Elongation A5(%) |
ST45 | ≥520 | ≥375 | ≥15 |
ST52(E355) | ≥600 | ≥520 | ≥14 |
SAE1026 | ≥600 | ≥510 | ≥15 |
16Mn | ≥600 | ≥520 | ≥14 |
20# | ≥520 | ≥375 | ≥15 |
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