Black Aluminum Screws

Black Aluminum Screws has unique advantages in thermal management. The thermal conductivity of its base material is about 205 watts per meter per Kelvin, which is much higher than the 16 watts of stainless steel. It can effectively conduct the heat accumulated at the connection points to the heat sink fins or shell quickly. At the same time, the emissivity of the black anodized film in the infrared band is as high as 0.92, which means that the screw itself can serve as an auxiliary radiation heat dissipation surface. In the actual measurement comparison of outdoor LED lamps, modules using this screw reduced the steady-state temperature rise in the core area by about six degrees Celsius compared to ordinary steel screw solutions. This thermal characteristic not only delays the thermal oxidative aging of the sealing ring, but also keeps the resistance of the contact surface stable, because the thermal resistance of each screw is only one-twentieth of that of steel products of the same specification, which is especially suitable for high-heat flux density working conditions inside high-power drives and car chargers.

 

 

From the perspective of reliability in long-term vibration environments, after one hundred thousand cyclic load tests, the preload retention rate of black aluminum screws still reaches more than 95% of the initial value. This is due to the low yield ratio and uniform plastic deformation ability of aluminum, which can effectively buffer the loosening trend caused by fretting wear. According to the destructive test on the M6 ​​specification sample, its guaranteed load is about 10.9 thousand Newtons, which is enough to meet the clamping needs of most thin-walled frames and plastic substrates. During actual installation, the lubricating coating can stabilize the thread friction coefficient in the range of 0.1 to 0.15, significantly reducing the torque dispersion. The color difference ΔE value of the black coating after 500 hours of accelerated UV aging is less than 1.5, proving that its appearance durability can meet the requirements for decoration and camouflage in year-round outdoor displays or marine climate environments.

 

 

 

 

 

JOYEAR provides high-volume, highly efficient export solutions for industrial components to clients worldwide. Our custom metal products are expertly crafted. If you send us your design files, whether they are digital drafts or prototypes, our talented team will precisely create tangible parts that satisfy your requirements.

★ Our product range includes:

► Materials: Carbon steel / Mild steel / Structural steel / Stainless steel / Aluminum / Copper, etc.

► Forms: Sheets / Profiles / Tubes / Round bars / Flat bars / Square bars, etc.

 

 

Obtain drawings from clients or produce drawings based on their samples or specifications.

The drawings, product raw materials, surface treatment, and other details are attested to by both parties.

 

 

 

 

Provide a quote, ensure that the order quantity is accurate, and include all relevant details,

such as the terms of payment, the terms of trade, the type of packaging, etc.

 

 

 

Follow the original drawings and samples exactly when producing the goods.

It was carefully packaged and delivered to the clients following a final inspection.

 

 

 

 

 

 

 

 

 

 

 

 

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