Why CK45 chrome hollow bar become the new favorite in hydraulic cylinder manufacturing industry?

 In the field of OEM hydraulic cylinder manufacturing, material selection directly affects product performance and service life. Recently, the material of CK45 Chrome Hollow Bar (chrome-plated hollow bar) has attracted widespread attention in the cylinder industry. What are the unique advantages of this alloy steel treated with a special process? 

1. Technological breakthroughs in CK45 chrome plating process
Traditional carbon steel bars have problems such as easy rust and insufficient wear resistance. CK45  Hard Chrome Bar and Hollow Bar uses vacuum chrome plating technology to form a dense chromium layer of 8-12μm on the surface, and its Rockwell hardness (HRC) can reach 58-62, which is more than 3 times higher than ordinary steel in wear resistance. This unique metal surface treatment process enables it to maintain excellent dimensional stability under high temperature and high pressure environments.

2. Analysis of the six core advantages

Lightweight design: The hollow structure is 40% lighter than solid bars, especially suitable for transmission parts of automation equipment

Precision tolerance control: outer diameter tolerance ±0.05mm, inner hole roundness error ≤0.01mm

Corrosion resistance enhancement: Passed ASTM B117 salt spray test, corrosion resistance time exceeds 2000 hours

Excellent cutting performance: Specially optimized carbon content (0.42-0.50%) improves processing efficiency

Multi-functional adaptation: supports turning, milling, grinding and other processing methods

Cost-effectiveness advantage: Reduces procurement costs by more than 25% compared to stainless steel materials

3. Display of typical application scenarios
After a certain automotive parts manufacturer adopted the Chrome Plated Hollow Bar with a specification of φ50×5mm, the life of its hydraulic tappet products increased from 80,000 times to 150,000 times. The following areas are particularly outstanding:

Injection molding machine guide column and ejector system

Food machinery conveyor shaft

Hydraulic cylinder piston rod assembly

Precision measuring instrument bracket

Look for JIS G4051 standard certification

Pay attention to the chromium layer bonding test report (should be ≥15MPa)

Require suppliers to provide material spectrum analysis

Prefer fine grinding and polishing surface treatment process

CK45 chrome hollow bar

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