42CrMo4 4140 Hard Chrome Plated Steel Bar /Chrome Shaft /Hydraulic Piston Rod

• Material: Carbon Steel
• Load: Drive Shaft
• Stiffness & Flexibility: Stiffness / Rigid Axle
• Journal Diameter Dimensional Accuracy: IT6-IT9
• Axis Shape: Straight Shaft
• Shaft Shape: Real Axis
• Appearance Shape: Round
• Journal Surface Roughness: 0.63-0.16μm
• Product Name: Hard Chrome Plated Chrome Rod
• Heat Treatment: None, Induction Hardened, Q+T
• Hardened Depth: 0.5-3.5mm
• Roundness: Dia.Tolerance/2
• Material Grade: Ck45, 20mnv6, 42CrMo4
• Dia.Range: Ø12-Ø320
• Chrome Layer Hardness: Min.800hv
• Material Hardness: HRC15, HRC30, HRC55 Can Be Choice
• Name: Ck45 Hard Chrome Plated Piston Rod for Hydraulic
• Transport Package: Paper Sleeved, Shockproof Membrane, Wooden Case
• Specification: 4m, 5.8m, 6m, 7.5m
• Trademark: ISO F7
• Origin: China
• HS Code: 8483109000
• Production Capacity: 20000tons/Year

Product Description

Main Products
Steel Flat	Steel Plate	Die Steel
Plastic Mold Steel	Alloy Steel	Pre-machined Flat
Die Casting Die	Mold Base	Aluminum Die

Description

Auto Spare Parts Car Accessories Motorcycle Pipe Piston Rod with Gear Shaft
Connecting Stainless Steel Bar  Hydraulic Cylinder Shock Absorber Diesel
Engine Pump

The piston rod is a connecting part that supports the piston to do work. Most of it is used in the motion execution parts of oil cylinder
and air cylinder. It is a moving part with frequent movements and high technical requirements.

FAQ

he 42CrMo4 4140 Hard Chrome Plated Steel Bar, also known as the Chrome Shaft or Hydraulic Piston Rod, is an industrial-grade product designed to meet the rigorous demands of various hydraulic and mechanical applications. Combining the superior properties of 42CrMo4 and 4140 steel alloys with advanced surface treatments, this rod delivers exceptional performance, durability, and reliability.

Material Composition and Properties

42CrMo4 and 4140 Steel Alloys:

• 42CrMo4 Steel: This is a high-strength alloy steel with a chromium-molybdenum composition. The presence of chromium enhances its hardness and corrosion resistance, while molybdenum improves its toughness and resistance to wear. The typical composition includes 0.38-0.45% carbon, 0.9-1.2% chromium, and 0.15-0.3% molybdenum. This combination results in a material that is both strong and resilient, capable of withstanding significant mechanical stress.
• 4140 Steel: Similar to 42CrMo4, 4140 steel is a chromium-molybdenum alloy known for its excellent mechanical properties. It features a balanced mix of carbon (0.38-0.43%), chromium (0.75-1.00%), and molybdenum (0.15-0.25%), making it suitable for high-stress applications. It offers high fatigue strength, impact resistance, and good machinability.

Manufacturing Process

Precision Machining:

• The rods are precision-machined to ensure tight dimensional tolerances and a smooth surface finish. This is crucial for applications requiring exact fit and alignment, such as in hydraulic cylinders and other precision machinery.

Induction Hardening:

• This process involves heating the rod using an alternating magnetic field, followed by rapid cooling (quenching). Induction hardening creates a hard, wear-resistant surface while maintaining a tough, ductile core. This dual-phase microstructure enhances the rod's durability and wear resistance, making it ideal for high-stress environments.

Hard Chrome Plating:

• The final stage of the manufacturing process involves electroplating the rod with a layer of hard chrome. This plating provides a smooth, low-friction surface that is highly resistant to corrosion and wear. The chrome layer typically ranges from 0.0005 to 0.005 inches in thickness, depending on the application requirements. This protective layer ensures long-lasting performance even in harsh operating conditions.

Applications

The 42CrMo4 4140 Hard Chrome Plated Steel Bar is extensively used in various industries due to its robust properties:

Hydraulic Cylinders:

• These rods are commonly used as piston rods in hydraulic cylinders, where they must endure high pressures and dynamic forces. The induction hardening and chrome plating processes ensure the rods can handle heavy loads and friction with minimal wear.

Industrial Machinery:

• In construction and heavy machinery, these rods serve as critical components in actuators and other hydraulic systems. Their strength and durability make them suitable for the demanding conditions of industrial environments.

Automotive and Aerospace:

• Precision and reliability are crucial in these sectors. These rods meet the rigorous standards required for components in high-performance vehicles and aircraft, providing consistent and reliable performance.

Key Benefits

1. High Strength and Toughness: The use of 42CrMo4 and 4140 steel alloys ensures that these rods can withstand high mechanical stresses without deforming or failing.

2. Enhanced Wear Resistance: Induction hardening significantly improves surface hardness, extending the rod's lifespan even under heavy use.

3. Corrosion Resistance: The hard chrome plating provides an effective barrier against rust and corrosion, essential for hydraulic applications exposed to fluids and harsh environments.

4. Precision and Reliability: Manufactured to exacting standards, these rods ensure a perfect fit and consistent performance in all applications, reducing downtime and maintenance costs.

Conclusion

The 42CrMo4 4140 Hard Chrome Plated Steel Bar, also known as the Chrome Shaft or Hydraulic Piston Rod, is an exceptional choice for industries requiring durable, high-performance components. Its advanced material composition, coupled with state-of-the-art manufacturing processes, ensures that it meets the highest standards of quality and performance. Whether used in hydraulic systems, industrial machinery, or high-stress automotive and aerospace applications, these rods provide a reliable solution for the most demanding environments, ensuring long-lasting performance and reduced maintenance costs.