4140 Chrome Plated Rod Normalized (HRC 15–22)
The 4140 Chrome Plated Rod Normalized (HRC 15–22) is a high-strength steel bar widely used in hydraulic and pneumatic cylinder applications. Known for its balance of toughness, wear resistance, and machinability, this product is designed to meet the demanding requirements of engineering projects. By combining the advantages of 4140 alloy steel with chrome plating and normalizing treatment, it ensures exceptional surface finish, improved fatigue resistance, and a hardness range of HRC 15–22.
Brand:EAST AI
Material:4140
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 to be spread on rod surface and each rod to be packed in paper roll and then in wooden case,can be customised according to customer requirements
Roughness:≤0.2u
Product Description
Advantages of 4140 Chrome Plated Rod Normalized (HRC 15–22)
The 4140 Chrome Plated Rod Normalized (HRC 15–22) offers a range of advantages that make it a preferred choice for hydraulic cylinder manufacturers and engineering contractors:
Superior Mechanical Properties
4140 alloy steel provides higher tensile strength and toughness compared to CK45 or ST52, making it suitable for heavy-duty applications.
Enhanced Surface Finish
Chrome plating ensures low friction, high wear resistance, and extended service life in hydraulic systems.
Controlled Hardness
Normalized heat treatment gives a hardness range of HRC 15–22, providing a balance of machinability and durability.
Corrosion Resistance
The chrome surface layer protects against rust and environmental degradation.
Dimensional Accuracy
Precision grinding ensures accurate tolerances for smooth cylinder operation.
Versatility
Widely applicable in hydraulic cylinders, pneumatic systems, lifting machinery, and construction equipment.
Production Process of 4140 Chrome Plated Rod Normalized (HRC 15–22)
The manufacturing of 4140 Chrome Plated Rod Normalized (HRC 15–22) follows strict procedures to guarantee quality and consistency:
Raw Material Selection
High-grade 4140 alloy steel is carefully sourced.
Peeling and Straightening
Surface defects are removed, and the rod is straightened to meet alignment standards.
Normalizing Heat Treatment
The rods are heated and air-cooled to refine the grain structure and achieve uniform hardness (HRC 15–22).
Centerless Grinding
Achieves precise diameter tolerance and smoothness.
Hard Chrome Plating
A uniform chrome layer is applied for surface protection and wear resistance.
Polishing and Finishing
Final polishing enhances the surface roughness to meet hydraulic system requirements.
Inspection and Testing
Each rod undergoes mechanical, dimensional, and surface quality checks before dispatch.
This process ensures every rod meets the strict demands of engineering projects.
Applications of 4140 Chrome Plated Rod Normalized (HRC 15–22)
The 4140 Chrome Plated Rod Normalized (HRC 15–22) is suitable for various industries where durability, strength, and reliability are essential:
Hydraulic Cylinders
Main piston rods in construction machinery, excavators, and forklifts.
Pneumatic Cylinders
Applications requiring lightweight but strong components.
Industrial Machinery
Press machines, lifting equipment, and automated systems.
Agricultural Equipment
Hydraulic arms and implements in tractors and harvesters.
Marine Applications
Corrosion-resistant piston rods for offshore machinery.
Mining Equipment
Heavy-duty piston rods used in hydraulic drilling rigs and loaders.
This wide application range makes it an attractive stock option for distributors and suppliers.
Product Details of 4140 Chrome Plated Rod Normalized (HRC 15–22)
Parameter | Specification |
Material | 4140 Alloy Steel |
Condition | Normalized |
Hardness | HRC 15–22 |
Surface Coating | Hard Chrome Plated |
Surface Roughness | Ra ≤ 0.2 µm |
Tolerance | f7 / h8 |
Chrome Layer Thickness | 20–30 µm |
Straightness | ≤ 0.2 mm/m |
Diameter Range | Ø 6 mm – Ø 350 mm |
Length | Up to 8000 mm |
These specifications ensure compatibility with a wide range of hydraulic and pneumatic systems.
Factory Stock of 4140 Chrome Plated Rod Normalized (HRC 15–22)
Our factory maintains a large inventory of 4140 Chrome Plated Rod Normalized (HRC 15–22) in various diameters and lengths. This enables:
Quick Delivery
Stock availability shortens lead times for urgent projects.
Flexible Order Quantities
From bulk distributor orders to small engineering requirements.
Customized Sizes
Cutting and machining services available upon request.
Distributors and stockists benefit from reliable supply and consistent quality, ensuring that end-users receive the products they need without delays.
Quality Testing of 4140 Chrome Plated Rod Normalized (HRC 15–22)
Every 4140 Chrome Plated Rod Normalized (HRC 15–22) undergoes a series of inspections to ensure compliance with international standards:
Hardness Testing
Verifying HRC 15–22 range after normalizing treatment.
Salt Spray Test
Ensures corrosion resistance of the chrome plating.
Ultrasonic Testing
Detects internal cracks or defects.
Surface Inspection
Checks for chrome uniformity and roughness levels.
Straightness Check
Ensures proper alignment for hydraulic system function.
Dimensional Measurement
Confirms tolerance compliance (f7 / h8).
These strict testing procedures guarantee reliability and long service life.
Certificates for 4140 Chrome Plated Rod Normalized (HRC 15–22)
Our 4140 Chrome Plated Rod Normalized (HRC 15–22) is supplied with recognized certifications, providing trust and assurance to distributors, stockists, and engineering companies:
Material Test Certificate (MTC)
Confirms chemical composition and mechanical properties.
ISO Quality Management Certification
Ensures standardized production control.
Third-Party Inspection Reports
SGS, BV, or other organizations upon request.
GL Approval (Germanischer Lloyd)
Certification for marine and offshore applications.
These certificates strengthen confidence for global distribution and engineering use.
