EASTAI is a professional manufacturer specializing in a wide range of components for hydraulic and pneumatic cylinders, including cylinder tubes, seamless carbon steel, hard chrome piston rods, induction hardened chromed shafts, and SAE4140 hard chrome bars. Our products are designed to meet the diverse needs of industries such as heavy machinery, hydraulics, mining, and agricultural machinery. EASTAI is committed to delivering superior mechanical properties for various applications through specialized treatments like induction hardening, quenching, and tempering.
Induction Hardened Piston Rod
Induction hardening significantly enhances the mechanical properties of ferrous and alloy components, particularly in high-stress areas. This process involves heating the outer surface of the piston rod using a copper coil and alternating current, bringing it to a temperature above the transformation range, followed by immediate tempering to achieve the desired hardness. Typical materials for this process include 1045, 20MnV6, 4140, and 4340.
The result is a piston rod with increased hardness, wear resistance, and fatigue life, making it ideal for use in components such as gears, crankshafts, and drive shafts, where these properties are critical. EASTAI provides a wide range of sizes for induction-hardened piston rods, from 6mm to 255mm.
SAE 4140 Quenched and Tempered Piston Rod
The quenching and tempering process strengthens materials by heating them to extreme temperatures and then rapidly cooling them using water, air, oil, or inert gases like nitrogen. This process is particularly suited for alloy components like 4140 and 4340 steel. It enhances the toughness, ductility, and abrasion resistance of the piston rods, making them less brittle and more suitable for demanding environments.
SAE 4140 quenched and tempered piston rods are highly recommended for construction applications, such as dump trucks and mining equipment, due to their superior strength and abrasion resistance. EASTAI offers these piston rods in sizes ranging from 10mm to 200mm.
Specification Overview
To better compare the features of our induction hardened and quenched and tempered piston rods, here is a consolidated specification chart:
| Feature | Induction Hardened Piston Rod | SAE 4140 Quenched and Tempered Piston Rod |
| External Diameter Accuracy | f8 | f7, f8 |
| Surface Roughness | max Ra 0.2μm | max Ra 0.2μm |
| Hard Chrome Thickness | <Φ22.225mm: min 15 μm, ≧Φ24mm: min 20 μm | <Φ22.225mm: min 15 μm, ≧Φ24mm: min 20 μm |
| Surface Hardness | EASTAI 55° ± 2° | min HV 850 |
| Hardened Depth | 0.5mm – 1.5mm | – |
| Straightness | <Φ20mm: max 0.25/1000mm, ≧Φ20mm: max 0.2/1000mm | <Φ20mm: max 0.25/1000mm, ≧Φ20mm: max 0.2/1000mm |
| Roundness | tolerance × 1/2 | tolerance × 1/2 |
| Standard Length | 2M – 6M | 2M – 6M |
| Standard Size | Φ6 ~ Φ255 (Φ1/4” ~ Φ10”) | Φ10 ~ Φ200 (Φ1/4” ~ Φ10”) |
| Steel Grades Available | JIS S45C, S55C, SAE1045, DIN CK45, 20MnV6, JIS SCM440 | JIS G4105(SCM440), SAE4140, DIN 42CrMo4, EN 42CrMo4, EN19 |
| Custom Treatments | Available upon request | Induction Quenched and Tempered, 42CrMo4 QT, Induction Hardening 4140, EN19 |
Applications in Different Industries
Both induction hardened chromed shafts and SAE4140 hard chrome bars are widely used across various industries due to their enhanced durability and resistance to wear and corrosion. These components are particularly valuable in:
- Heavy Machinery: Ideal for gears, crankshafts, and drive shafts that endure high stress and frequent usage.
- Construction Equipment: Used in hydraulic cylinders, dump trucks, and other machinery that requires high strength and abrasion resistance.
- Mining Industry: Perfect for components exposed to harsh environments, including heavy loads and corrosive conditions.
Why Choose EASTAI for Your Hydraulic Needs?
EASTAI has established itself as a leader in the hydraulics market by consistently providing high-quality induction hardened piston rods and SAE 4140 quenched and tempered piston rods. Our products have successfully captured significant market shares in the mechanical, construction, and mining industries, owing to their unmatched durability, performance, and reliability.
We remain committed to manufacturing and innovating high-quality hydraulic components to meet our customers’ evolving demands. Choose EASTAI for your hydraulic solutions and experience unparalleled quality and service.
If you find this information helpful, please feel free to contact us at: jeff@east-ai.cn.
