Steel rod

for machiningpolishedhigh-strength

Product Overview
The 42CrMo4 chrome-plated piston rod, induction-hardened to HRC 50-62, is engineered for hydraulic and pneumatic cylinder applications requiring high surface hardness, wear resistance, and dimensional accuracy. Suitable for mobile equipment, industrial machinery and heavy-duty systems.

Key Details

• Model: Induction-Hardened
• Brand: EAST AI
• Material: 42CrMo4 alloy steel
• Maximum Length: 15 m
• ID Tolerance: f7 / f8 / g6, etc.
• Straightness: ≤0.2/1000 mm
• Roughness: ≤0.2 μm
• Packing: Anti-rust oil on surface; paper roll then wooden case; customizable

Advantages

• High Surface Hardness (HRC 50-62): Excellent abrasion and wear resistance.
• Improved Fatigue Strength: Induction hardening increases load capacity and shock resistance.
• Corrosion Protection: Chrome plating reduces rust and chemical attack.
• Dimensional Accuracy: Low roughness and tight tolerances for smooth cylinder operation.
• Long Service Life: Designed for harsh operating conditions.
• Availability: Large stock and flexible sizes to meet distributor and OEM needs.

Production Process

• Raw Material Selection: Premium 42CrMo4 alloy steel.
• Cutting & Rough Machining: Bars processed to required lengths and diameters.
• Heat Treatment (Quenching & Tempering): Core toughness and overall strength improvement.
• Peeling & Grinding: Diameter accuracy and surface preparation.
• Induction Hardening: Surface hardened to HRC 50-62 while maintaining a tough core.
• Polishing: Low-friction surface finish.
• Chrome Plating: Corrosion and wear protection.
• Final Inspection: Hardness, plating thickness, straightness and roughness checks.

Applications

• Hydraulic Cylinders: Construction, mining and heavy machinery.
• Pneumatic Cylinders: Industrial automation and manufacturing equipment.
• Agricultural Machinery: Tractors and harvest equipment hydraulics.
• Marine: Offshore hydraulic systems exposed to saltwater.
• Oil & Gas: Drilling and exploration hydraulic components.
• Industrial Equipment: Presses, lifting systems and precision tooling.

Factory Inventory and Supply

• Quick Delivery: Standard sizes available for immediate shipment.
• Flexible Order Quantities: From small trial orders to bulk distributor requirements.
• Custom Dimensions: Cutting, machining and threading to order.
• Global Network: Supply chain support for international shipments.

Quality Testing and Inspection

• Hardness Testing: Verifies HRC 50-62 surface hardness.
• Chrome Thickness Measurement: Ensures uniform plating.
• Salt Spray Test: Confirms corrosion resistance.
• Straightness Check: Prevents cylinder misalignment.
• Surface Roughness Test: Ensures smooth piston performance.
• Eddy Current & Ultrasonic Testing: Detects internal and surface defects.

Certifications

• ISO 9001 Quality Management System
• ISO 14001 Environmental Management System
• SGS / TUV Inspection Reports
• Material Traceability Certificates (EN 10204 3.1 / 3.2)
• Compliance with European and American hydraulic industry standards

Technical Specifications

• Material: 42CrMo4 alloy steel
• Surface Hardness: HRC 50-62 (surface)
• Chrome Plating: Applied for corrosion and wear protection
• Maximum Length: 15 m
• ID Tolerance: f7 / f8 / g6
• Straightness: ≤0.2/1000 mm
• Surface Roughness: ≤0.2 μm
• Packing: Anti-rust oil; paper roll and wooden case (customizable)
• Typical Applications: Hydraulic/pneumatic cylinders, agricultural, marine, oil & gas, industrial machinery
• Quality Controls: Hardness, chrome thickness, salt spray, straightness, roughness, eddy current & ultrasonic testing