1. Standard: GB/T 3639, GB/T 8713, DIN2391, EN10305, ASTM A519, ASTM A513 2. Grade: C20, CK45, E355, ST52, SAE1026, 4130, 4140, etc. 3. Length: Fixed length, Random length or as requests of customers 4. Application: Hydraulic cylinder, Engineering machinery, Metallurgical machinery, Plastic machinery, Hoisting machinery, Road construction machinery, Textile machinery 5. Inspection equipment: Spectrometer, Ultrasonic and eddy flaw-inspecting system, impact test machine, Universal tensile test machine, Rockwell hardness test machine, etc.
We are committed to working with every customer to share ideas and gather critical information about the fit and performance requirements of your specific application of hydraulic cylinders. If our standard line is not suitable for your application, we can advise you on custom hydraulic cylinders and we have extensive experience in designing them. We strive to develop dynamic, innovative and reliable hydraulic and machining solutions that exceed your expectations.
As a leading hydraulic cylinder manufacturer, we are committed to providing hydraulic cylinders and solutions to meet the needs of a variety of different market segments. Our products are used in a wide range of applications including mining and construction, agriculture and maintenance, load handling, forestry, lifting, recycling, defense, energy and more.
| Working method | Tube ID (mm) | Length (M) | Straightness (mm/M) | Tolerance on ID | Tolerance on WT | ID roughness (μm) |
| Cold drawn | 40-500 | ≤12M | 0.2-0.5 | ± 5% | ≤1.6 | |
| Cold rolled | 40-150 | ≤12M | 0.2-0.5 | ± 5% | ≤0.8 | |
| Cold drawn + Honing | 40-500 | ≤8M | 0.2-0.3 | H8-H9 | ± 5% | ≤0.4 |
| Cold drawn +SRB | 50-300 | ≤8M | 0.2-0.3 | H8-H9 | ± 5% | ≤0.4 |
| Grade | Cold finish | Cold drawn + BK/S | Hardness | Impact value (-20°C) J | |||
| Tensile strength | Elongation 5% | Tensile strength | Yield strength | Elongation 5% | BH | ||
| C20 | ≥550 | ≥8% | ≥520 | ≥400 | ≥15% | 170 | / |
| CK45 | ≥680 | ≥5% | ≥630 | ≥520 | ≥12% | 190 | / |
| Q345B | ≥660 | ≥8% | ≥620 | ≥520 | ≥15% | 190 | / |
| Q345D | ≥660 | ≥8% | ≥620 | ≥520 | ≥15% | 190 | ≥27 |
| 25Mn | ≥640 | ≥8% | ≥620 | ≥510 | ≥15% | 190 | / |
| 27SiMn | ≥780 | ≥5% | ≥700 | ≥580 | ≥10% | 220 | / |
| E355 | ≥700 | ≥8% | ≥650 | ≥580 | ≥15% | 195 | ≥27 |
| Grade | C | Si | Mn | P | S | Cr | Ni | Cu | V | Al |
| C20 | 0.17-0.23 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.25 | / | / |
| CK45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.25 | / | / |
| Q345B | ≤0.20 | ≤0.50 | ≤1.70 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.50 | ≤0.30 | ≤0.15 | / |
| Q345D | ≤0.18 | ≤0.50 | ≤1.70 | ≤0.030 | ≤0.025 | ≤0.30 | ≤0.50 | ≤0.30 | ≤0.15 | ≥0.015 |
| 27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.30 | ≤0.20 | / | / |
| 25Mn | 0.22-0.29 | 0.17-0.37 | 0.7-1.0 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.25 | / | / |
| W355 | ≤0.22 | ≤0.55 | ≤1.60 | ≤0.025 | ≤0.025 | / | / | / | / | ≥0.02 |