Steel rod

tubularfor general purposescorrosion resistant

Overview
The ST52 Chrome Plated Rod Induction And Hardened (HRC 50-62) is a hydraulic piston rod engineered for heavy-duty mechanical and hydraulic systems. Manufactured from ST52 seamless steel, it is precision ground, chrome plated and induction hardened to provide a hardened surface (HRC 50-62), low surface roughness and improved corrosion resistance for demanding industrial, mobile and marine applications.

Key product details

• Model: Induction And Hardened
• Brand: EAST AI
• Material: ST52 seamless steel
• 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 applied to rod surface; each rod packed in paper roll and then in wooden case; customizable
• Surface roughness: Ra ≤ 0.2 μm

Advantages

• High surface hardness: Induction hardening achieves HRC 50-62 for superior wear resistance.
• Superior corrosion resistance: Chrome plating delivers a smooth, rust-resistant finish suitable for outdoor and marine environments.
• Excellent fatigue strength: Induction-hardened layer increases fatigue life under dynamic loads.
• Dimensional accuracy: Precision grinding ensures tight tolerances for hydraulic systems.
• Cost-effective performance: Extended service life reduces maintenance and replacement frequency.
• Versatility: Suitable for hydraulic cylinders, material handling, construction, agricultural and marine equipment.

Production process

• Raw Material Selection: High-quality ST52 seamless steel bars chosen for machinability and strength.
• Rough Turning & Straightening: Machining and straightening prepare bars for precision grinding.
• Peeling & Grinding: CNC grinding to achieve required tolerances and surface finish.
• Induction Hardening: Surface heated by induction then quenched to form hardened layer (HRC 50-62) with tough core.
• Chrome Plating: Uniform chrome layer applied for corrosion resistance and smooth finish (typical plating thickness 20–30 μm).
• Polishing: Final polishing to achieve mirror-like surface roughness (Ra ≤ 0.2 μm).
• Quality Inspection: Dimensional, hardness, adhesion and corrosion tests to confirm compliance.

Applications

• Hydraulic cylinders for mobile and industrial systems (lifting, pushing)
• Construction machinery: excavators, loaders, bulldozers, cranes
• Agricultural equipment: tractors, harvesters, ploughing machinery
• Material handling: forklifts, lifting platforms, hoists
• Marine & offshore equipment: corrosion-resistant components for seawater conditions
• Industrial automation: hydraulic/pneumatic presses and manufacturing machinery

Quality testing

• Hardness testing to verify surface HRC 50-62.
• Chrome thickness measurement (typical 20–30 μm) to verify plating uniformity.
• Salt spray testing to validate corrosion resistance.
• Ultrasonic testing to detect internal defects.
• Straightness check to ensure deviation within 0.2 mm per 1000 mm.
• Surface inspection to detect pitting, cracks or pinholes.

Certificates

• ISO 9001:2015 Quality Management System
• Material Test Certificate (EN 10204 3.1 / 3.2)
• Third-party inspection reports (e.g., SGS / BV)
• Salt spray resistance and hardness & plating reports

Technical characteristics / specifications

• Model: Induction And Hardened
• Brand: EAST AI
• Material: ST52 seamless steel
• Surface hardness: HRC 50-62 (induction hardened)
• Chrome plating thickness: typically 20–30 μm
• Max. length: 15 m
• ID tolerance: f7 / f8 / g6, etc.
• Straightness: ≤0.2 mm per 1000 mm
• Surface roughness: Ra ≤ 0.2 μm
• Packing: Anti-rust oil on surface; paper roll then wooden case (customizable)
• Typical applications: heavy-duty hydraulic cylinders, construction machinery, material handling, agricultural and marine equipment