Hydraulic Cylinder Tube
With strictly chosen raw material and fully traceable quality assurance system, we ensure physical performance, dimensional accuracy, surface finish, and quality stability of each piece of hydraulic cylinder tube delivered to the end user.
1.High Strength, uniformed mechanical property.
2.High precision, strict tolerance of H8 for honed (SRB) tubes.
3.High concentricity, minimized wall deviation.
4.High straightness, up to 0.1mm/m.
5.Smooth surface condition, roughness under Ra 0.4um.
6.Wide diameter range, OD from 20-400mm, wall thickness from 0.8-25.4mm.
1.Construction Hydraulic Cylinders
2.Agriculture Hydraulic Cylinders
3.Multistage Cylinders
4.Mining Cylinders
5.Forklift Hydraulic Cylinder
6.Material Handling Cylinders
7.Forestry Cylinders
Grade | C | Si | Mn | P | S |
ST37-2 | ≤0.24 | 0.17-0.37 | ≤0.6 | 0.035 | 0.035 |
45# | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 |
ST52 | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 |
1026 | 0.22-0.28 | 0.15-0.35 | 0.60-0.90 | 0.04 | 0.05 |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 |
Grade | Application | Delivery | Yield Strength | Tensile Strength | Elongation | Hardness | Impact Energy |
ST37-2 | Cylinder barrel | +SR | 420 | 550 | 12 | 170-210 |
|
45# | Cylinder barrel | N/+SR | 480 | 620 | 15 | 190-230 | 30 (20℃) |
T52 | Cylinder barrel | +SR | 520 | 600 | 17 | 190-230 | 27 (-20℃) |
1026 | Cylinder barrel | +N/+SR | 520 | 600 | 17 | 190-230 | 30 (20℃) |
27SiMn | Hydraulic Prop | QT/+SR | 720 | 860 | 12 | 230-280 | 30 (20℃) |
Standard | GB/T3639 , ASTM A519, ASTM A513, DIN2391, EN10305-1, EN10305-2 | |
Delivery status | Stress Released Annealing (+SR), | |
OD Tolerance | OD< 40 mm | +/-0.1mm |
40 to 100 mm | +/-0.15mm | |
100 to 200 mm | +/-0.2mm | |
200 to 300 mm | +/-0.25mm | |
300 to 400 mm | +/-0.3mm | |
WT Tolerance: | OD<100mm | +/-5% |
OD>100mm | +/-7.5% | |
DOM tubes have better wall thickness variance +/-2.5% | ||
Straightness | <0.3/1000mm | |
ID Tolerance | ISO H8 for honed/SRB tubes | |
ID Roughness | Ra ≤0.4um for honed/SRB tubes | |
Length | 5.0-5.8m to fit into a 20 foot container | |
Tolerance for fixed length | LG<500mm | +2mm |
500 to 2000mm | +5mm | |
2000 to 5000mm | +10mm | |
5000 to 7000mm | +20mm | |
Stenciling | Mill name + specification + delivery status + Steel Grade + Size + Heat No | |
Rust prevention | Inside Of The Tube To Be Sprayed With Rust Inhibitor To Protect Against Rust. | |
Tubes end | Ends To Be Capped Off To Prevent Any Contamination Of The Inner Bore | |
Packing | Hexagonal packing，wrapped with plastic sheets inside and woven cloth outside of the package | |
No. | OD | ID | WT | No. | OD | ID | WT |
1 | 32 | 25 | 3.5 | 34 | 108 | 80 | 14 |
2 | 35 | 25 | 5 | 35 | 110 | 90 | 10 |
3 | 40 | 30 | 5 | 36 | 110 | 100 | 5 |
4 | 42 | 32 | 5 | 37 | 112 | 100 | 6 |
5 | 42 | 35 | 3.5 | 38 | 114.3 | 88.9 | 12.7 |
6 | 43 | 35 | 4 | 39 | 114.3 | 101.6 | 6.35 |
7 | 50 | 40 | 5 | 40 | 120.7 | 101.6 | 9.525 |
8 | 60 | 50 | 5 | 41 | 121 | 100 | 10.5 |
9 | 63 | 50 | 6.5 | 42 | 125 | 100 | 12.5 |
10 | 60.8 | 50.8 | 5 | 43 | 127 | 95.25 | 15.875 |
11 | 63.5 | 50.8 | 6.35 | 44 | 130 | 100 | 15 |
12 | 65 | 55 | 5 | 45 | 133 | 110 | 11.5 |
13 | 70 | 60 | 5 | 46 | 135 | 120 | 7.5 |
14 | 73 | 63 | 5 | 47 | 139.7 | 114.3 | 12.7 |
15 | 75 | 60 | 7.5 | 48 | 146.1 | 95.25 | 25.4 |
16 | 76 | 63 | 6.5 | 49 | 152.4 | 127 | 12.7 |
17 | 76.2 | 63.5 | 6.35 | 50 | 160 | 130 | 15 |
18 | 83 | 70 | 6.5 | 51 | 170 | 140 | 15 |
19 | 88.9 | 76.2 | 6.35 | 52 | 180 | 150 | 15 |
20 | 90 | 75 | 7.5 | 53 | 190 | 160 | 15 |
21 | 90 | 80 | 5 | 54 | 194 | 160 | 17 |
22 | 93 | 80 | 6.5 | 55 | 196.9 | 165.1 | 15.9 |
23 | 95 | 80 | 7.5 | 56 | 200 | 180 | 10 |
24 | 100 | 90 | 5 | 57 | 203 | 170 | 16.5 |
25 | 105 | 90 | 7.5 | 58 | 210 | 170 | 20 |
26 | 101.6 | 88.9 | 6.35 | 59 | 219 | 180 | 19.5 |
27 | 102 | 80 | 11 | 60 | 225 | 180 | 22.5 |
28 | 102 | 90 | 6 | 61 | 235 | 200 | 17.5 |
29 | 102 | 85 | 8.5 | 62 | 240 | 220 | 10 |
30 | 104 | 90 | 7 | 63 | 245 | 200 | 22.5 |
31 | 105 | 90 | 7.5 | 64 | 273 | 220 | 26.5 |
32 | 105 | 85 | 10 | 65 | 299 | 250 | 24.5 |
33 | 108 | 90 | 9 | 66 | 273 | 250 | 11.5 |
