Piston rod

Product overview
The 20MnV6 Chrome Plated Rod Quenched and Tempered (HRC 25–32) is a premium-grade hydraulic rod designed to deliver excellent mechanical strength, wear resistance, and dimensional stability. With its quenched and tempered condition, the rod provides reliable hardness levels (HRC 25–32) and enhanced toughness. Its hard chrome plating guarantees excellent surface finish, superior corrosion resistance, and extended service life. This makes it suitable for demanding hydraulic cylinder applications across construction, agriculture, and industrial sectors.

Key product information

• Model: Q+T
• Brand: EAST AI
• Material: 20MnV6
• Length: Max. 15m
• ID Tolerance: f7 / f8 / g6, etc.
• Straightness: ≤0.2/1000 mm
• Application: Hydraulic cylinders for mobile equipment, industrial machinery, and heavy-duty systems
• Packing: Anti rust oil spread on rod surface; each rod packed in paper roll then in wooden case; customizable
• Roughness: ≤0.2µ

Advantages

• High Strength & Toughness — Quenched and tempered treatment ensures HRC 25–32 hardness, balancing durability with shock resistance.
• Excellent Machinability — 20MnV6 material allows easy cutting, threading, and welding while maintaining surface integrity.
• Corrosion Resistance — Hard chrome plating prevents rusting in humid or outdoor environments, extending product lifespan.
• Wear Resistance — Chrome plating reduces friction and wear in heavy-duty hydraulic cylinder operations.
• Dimensional Stability — Maintains precise tolerances under high pressure and load.
• Long Service Life — Lower maintenance costs and reduced downtime.

Production process

• Raw Material Selection — Premium 20MnV6 steel sourced for high purity and reliability.
• Heat Treatment (Quenching & Tempering) — Rods are heat-treated to achieve HRC 25–32, improving toughness.
• Peeling & Grinding — Surface is peeled and ground for accurate dimensions and consistent tolerance.
• Polishing — High precision polishing ensures smoothness and optimal chrome adhesion.
• Hard Chrome Plating — A uniform chrome layer is applied for corrosion and wear resistance.
• Final Inspection — Dimensions, hardness, and surface finish are tested before shipment.

Process table
Process Step — Description
Raw Material Selection — Premium 20MnV6 steel is sourced to ensure high purity, strength, and reliability.
Heat Treatment (Q&T) — Rods undergo quenching and tempering to reach HRC 25–32, improving toughness and durability.
Peeling & Grinding — Surface is peeled and ground for accurate dimensions and consistent tolerance.
Polishing — High precision polishing creates a smooth surface to improve chrome adhesion.
Hard Chrome Plating — A uniform chrome layer is applied, offering superior corrosion and wear resistance.
Final Inspection — Comprehensive tests check dimensions, hardness, and surface finish before delivery.

Applications

• Hydraulic cylinders (excavators, loaders, bulldozers, cranes)
• Agricultural equipment (tractors, harvesters, hydraulic lifting systems)
• Industrial machinery (press machines, injection molding equipment, lifting platforms)
• Transportation (truck tail lifts, bus suspension systems, railway hydraulics)
• Marine & offshore hydraulic systems exposed to harsh seawater conditions

Quality testing & certifications

• Hardness Test — Ensures consistent HRC 25–32 hardness after heat treatment.
• Salt Spray Test — Validates corrosion resistance of the chrome layer.
• Ultrasonic Testing — Detects internal flaws and ensures structural integrity.
• Surface Inspection — Checks for cracks, pitting, or uneven chrome plating.
• Dimensional Test — Confirms ISO tolerance compliance for diameter and straightness.
• Certificates referenced — ISO 9001:2015; Material Test Certificate (MTC 3.1 / 3.2); SGS / TUV inspection reports; GL Approval.

Technical specifications

• Material: 20MnV6
• Surface finish: Hard chrome plating
• Heat treatment: Quenched and tempered (Q+T)
• Hardness (HRC): 25–32
• Max. length: 15 m
• ID tolerance options: f7, f8, g6, etc.
• Straightness tolerance: ≤0.2/1000 mm
• Surface roughness: ≤0.2 µ
• Typical diameters in stock: Ø25 mm to Ø150 mm
• Packing: Anti-rust oil, paper roll, wooden case (customizable)