Steel round rod

for machiningpolishedfor general purposes

Product summary
The CK45 chrome-plated rod Q+T (quenched and tempered, HRC 25–32) is designed for hydraulic and pneumatic cylinder applications requiring balanced hardness, high toughness and precise surface quality. Manufactured from CK45 carbon steel, rods are heat-treated, precision-ground and chrome plated to provide wear resistance, corrosion protection and stable mechanical properties for heavy-duty industrial equipment.

Key information

• Model: Q + T
• Brand: EAST AI
• Material: CK45 carbon steel
• Maximum length: 15 m
• ID tolerance options: f7 / f8 / g6, etc.
• Straightness: ≤0.2 mm / 1000 mm
• Surface roughness: Ra 0.2–0.4 μm (target ≤0.2 μm)
• Packing: Anti-rust oil, paper roll per rod, wooden case; customizable

Advantages

• Balanced hardness and toughness: quenched and tempered to HRC 25–32 for reliable fatigue performance
• Durable corrosion protection: uniform chrome plating improves resistance to rust and environmental exposure
• Low friction surface: fine polishing and plating reduce wear on seals and extend service life
• Consistent machinability: CK45 provides predictable mechanical properties for assembly and machining
• Versatile compatibility: suitable for hydraulic cylinders, pneumatic cylinders and precision machinery

Production process

• Raw material selection: CK45 with controlled chemical composition
• Cutting and straightening to dimensional tolerance
• Quenching and tempering to achieve HRC 25–32
• Precision grinding to tight diameter tolerance and surface finish
• Chrome plating for corrosion and wear resistance
• Polishing and inspection to reach Ra 0.2–0.4 μm
• Final quality checks: straightness, hardness, plating thickness and microstructure verification

Application fields

• Hydraulic cylinders for construction, lifting and mobile equipment
• Pneumatic cylinders requiring extended seal life and smooth operation
• Industrial machinery: presses, machine tools and automation systems
• Material handling equipment such as forklifts and platforms
• Mining and heavy-duty equipment operating in harsh environments

Quality inspection

• Hardness testing to confirm uniform HRC 25–32
• Salt spray tests to verify chrome plating corrosion resistance
• Surface roughness measurement to ensure sealing performance
• Straightness inspection for precision assembly
• Plating thickness measurement for consistent protection

Certifications

• ISO 9001:2015 (Quality Management System)
• GL Approval of Material Manufacturers (AMM) — material compliance verified
• SGS and third-party test reports available

Technical specifications

• Material: CK45 carbon steel
• Heat treatment / Hardness: Quenched and tempered, HRC 25–32
• Commercial model: Q + T
• Brand: EAST AI
• Maximum length: 15 m
• ID tolerance options: f7 / f8 / g6, etc.
• Straightness tolerance: ≤0.2 mm per 1000 mm
• Surface roughness: Ra 0.2–0.4 μm (target ≤0.2 μm)
• Typical applications: hydraulic & pneumatic cylinders, industrial and material handling machinery
• Packing: anti-rust oil; paper roll per rod and wooden case; customizable