Steel rod

for machiningconstructionfor general purposes

Product Overview
The CK45 chrome-plated rod in normalized condition (HRC 15–22) is engineered for hydraulic and mechanical applications requiring a balance of strength, ductility and a corrosion-resistant finish. Manufactured to industrial standards, this rod suits distributors, stockists and engineering contractors seeking consistent mechanical properties and superior surface quality.

Key Product Attributes

• Material: CK45 (equivalent to SAE1045 / EN C45)
• Heat Treatment: Normalized
• Hardness Range: HRC 15–22
• Surface Treatment: Hard chrome plating (20–30 μm layer, customizable)
• Surface Roughness (Ra): ≤ 0.2 μm
• Straightness Tolerance: ≤ 0.2 mm / 1000 mm
• Outer Diameter Range: 8 mm – 350 mm
• Length Range: Up to 8 m standard (custom cut available); stock examples up to 6 m; max listed 15 m
• Tensile Strength: 600 – 750 MPa
• Yield Strength: ≥ 340 MPa

Advantages

• Balanced hardness and machinability — HRC 15–22 delivers moderate strength while retaining good machinability.
• Corrosion and wear resistance — Hard chrome layer (20–30 μm) protects against rust and surface abrasion.
• High straightness accuracy — ≤ 0.2 mm/1000 mm for reliable alignment in hydraulic systems.
• Fine surface finish — Ra ≤ 0.2 μm ensures smooth sealing and low friction in piston assemblies.
• Consistent mechanical properties — Normalized treatment promotes uniform grain structure and reproducible performance.
• Versatile applications — Suitable for hydraulic cylinders, construction and agricultural machinery, lifting equipment and material handling.
• Custom dimensions — OD 8–350 mm with cut-to-size service available.

Product Summary (from page list)

• Model: Normalized
• Brand: EAST AI
• Material: CK45
• Length: Max. 15 m (stock examples: up to 8 m or 6 m)
• ID Tolerance: f7 / f8 / g6, etc.
• Straightness: ≤ 0.2 mm / 1000 mm
• Application: Hydraulic cylinders for mobile equipment and industrial machinery
• Packing: Anti-rust oil on rod surface; each rod wrapped then packed in wooden case; customizable
• Roughness: ≤ 0.2 μm

Technical Parameters (table)
Material Grade — CK45 (Equivalent to SAE1045 / EN C45)
Heat Treatment — Normalized
Hardness Range — HRC 15 – 22
Surface Treatment — Hard chrome plating
Chrome Layer Thickness — 20 – 30 μm (customizable)
Surface Roughness (Ra) — ≤ 0.2 μm
Straightness Tolerance — ≤ 0.2 mm / 1000 mm
Outer Diameter Range — 8 mm – 350 mm
Length Range — Up to 8 m (custom cut available); stock up to 6 m; max 15 m
Tensile Strength — 600 – 750 MPa
Yield Strength — ≥ 340 MPa
Applications — Hydraulic cylinders, construction machinery, lifting equipment, agricultural use
Standards — DIN 2391, EN 10305, ISO 9001

Production Process (steps)

• Raw material selection — High-quality CK45 billets.
• Normalizing heat treatment — Ensures uniform grain structure and stable mechanical properties.
• Peeling / turning — Achieves accurate dimensions and removes surface defects.
• Straightening — Guarantees tight straightness tolerances for hydraulic use.
• Grinding & polishing — Prepares a smooth surface before plating.
• Hard chrome plating — Applies 20–30 μm layer for corrosion and wear protection.
• Final inspection & packaging — Dimensional, hardness and surface tests; packing per specification.

Quality Inspection

• Dimensional checks (diameter, roundness, straightness).
• Surface roughness measurement (Ra ≤ 0.2 μm).
• Chrome thickness verification (20–30 μm).
• Salt spray tests for corrosion resistance.
• Hardness testing (HRC 15–22).
• Ultrasonic inspection for internal defects.
• Delivery includes test reports and traceability documents.

Applications

• Hydraulic piston rods for mobile and industrial hydraulic systems.
• Construction machinery: excavators, loaders, cranes and lifting equipment.
• Agricultural machinery: tractors, harvesters and sprayers.
• Material handling: forklifts, scissor lifts and automation equipment.
• General engineering: shafts, guide rods and precision mechanical components.

Technical Specifications

• Material: CK45 (SAE1045 / EN C45)
• Heat treatment: Normalized
• Hardness: HRC 15–22
• Chrome plating thickness: 20–30 μm (customizable)
• Surface roughness: Ra ≤ 0.2 μm
• Straightness tolerance: ≤ 0.2 mm / 1000 mm
• Outer diameter range: 8–350 mm
• Length: up to 8 m (custom cut); stock examples up to 6 m; max 15 m
• Tensile strength: 600–750 MPa; Yield strength: ≥ 340 MPa
• Standards: DIN 2391, EN 10305, ISO 9001