Product Introduction
Hydraulic Cylinder Crane Piston Rod is the piston rod in a crane's hydraulic cylinder. Made from high-strength alloy steel, it's finely processed and surface-treated, like chrome-plating, to increase hardness and wear resistance. It can work stably under high pressure, withstand great force and friction, ensure the hydraulic system's reliable operation, push the piston to move back and forth, and achieve precise lifting control.
Product Advantages
Durability
The Hydraulic Cylinder Crane Piston Rod uses 42CrMo alloy steel with high-frequency quenching, achieving surface hardness over 850HV for superior wear resistance. The hard chrome plating exceeds 20μm with a friction coefficient below 0.15, reducing scratches and wear by 80% during repeated motion. Testing shows less than 0.02mm diameter wear after 100,000 cycles, lasting 3 times longer than standard zinc-plated rods.
Water Resistance
A polyurethane + nitrile rubber sealing system ensures zero leakage under high pressure, blocking water and dust. The 850HV chrome layer with chemical passivation resists salt spray corrosion for over 500 hours, increasing lifespan by 40% in humid environments like ports and mines.
High Pressure & Precision
The piston rod supports diameters from 6-300mm and lengths from 100-1200mm, machined to ISO f7 tolerance with straightness ≤0.2/1000mm for even force distribution under 45MPa pressure. Surface roughness under Ra0.2μm minimizes friction heat, extending operating range to -40°C~150°C and improving stability by 25%.
Long Lifespan
Finite element analysis optimizes stress distribution, increasing fatigue strength by 30%. Hard chrome plating and precision honing maintain straightness within 0.2/1000mm under heavy loads, preventing seal failure and extending maintenance intervals to 2.5x standard rods.
technical specification
|
Product Name |
Hard chrome plated Hydraulic cylinder piston rod |
|
Diameters |
6-300mm |
|
Length |
100mm-1200mm |
|
Steel grade |
DIN CK45 |
|
Tolerance |
ISO f7 |
|
Chrome thickness |
20μm(min) |
|
Hardness of the chrome layer |
850H V(min) |
|
Roughness |
Ra 0.2μm(max) |
|
Straightness |
0.2/1000mm |
|
Mechanical Properties(ck45) |
Yield strength ≥ 20Mpa |
|
Supply condition |
1.Hard chrome plated |
|
2.Induction hardened |
|
|
3.Quenched & Tempered |
|
|
4.Induction hardened with Q&T |
chemical composition
|
Material |
C% |
Mn% |
Si% |
S% |
P% |
V% |
Cr% |
|
Ck45 |
0.42-0.50 |
0.50-0.80 |
0.17-0.37 |
≤0.035 |
≤0.035 |
≤0.25 |
|
|
ST52 |
≤0.22 |
≤1.6 |
≤0.55 |
≤0.04 |
≤0.04 |
0.02-0.15 |
|
|
20MnV6 |
0.17-0.24 |
1.30-1.70 |
0.10-0.50 |
≤0.035 |
≤0.035 |
0.10-0.20 |
≤0.30 |
|
42CrMo4 |
0.38-0.45 |
0.50-0.80 |
0.17-0.37 |
≤0.035 |
≤0.035 |
0.07-0.12 |
0.90-1.20 |
|
40Cr |
0.37-0.45 |
0.50-0.80 |
0.17-0.37 |
≤0.035 |
≤0.035 |
0.80-1.10 |
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