DIN 1630 NBK Hydraulic Tube Metric Sizes:DIN 1630 NBK (normalized) seamless steel tubes are typically used for hydraulic and pneumatic power systems.

 

 

   DIN 1630 specifies non-alloy steel grades. Common material grades include St37.4, St44.4, and St52.4.

   St37.4 is suitable for low-pressure applications, St44.4 for medium-pressure, and St52.4 for high-pressure hydraulic systems.

 

 

   The surface of DIN 1630 NBK tubes typically undergoes a specific treatment to ensure smoothness and corrosion resistance.

   Common surface treatments include:

      Phosphating: A layer of zinc phosphate for corrosion protection.

      Oiling: Applied to prevent corrosion during storage and transportation.

      Passivation: Chemical treatment to enhance corrosion resistance.

 

 

   The "NBK" designation in DIN 1630 indicates specific heat treatment processes:

      Normalizing (N): To refine the grain structure and improve mechanical properties.

      Bright Annealing (B): Heat treatment in a controlled atmosphere to achieve a bright, scale-free surface.

      Non-destructive Testing (K): Ensures the absence of defects that could compromise the tubes integrity.

 

 

   DIN 1630 NBK tubes are widely used in hydraulic systems for various applications due to their precision and quality.

   Common uses include:

      Hydraulic Cylinders: Sturdy construction for high-pressure hydraulic cylinders.

      Hydraulic Lines: Seamless tubes ensure smooth flow and reliability.

      Automotive Industry: Especially in applications where precision and strength are critical.

      Machinery and Equipment: Where hydraulic systems are employed for power transmission.

 

DIN 1630 NBK Hydraulic Tubes are precision-engineered seamless circular tubes designed for high-pressure applications in hydraulic and pneumatic systems. These tubes are manufactured from fine-grain steel and undergo normalization to achieve the NBK (Normalized, Soft Annealed) condition, which ensures uniform material properties and optimal mechanical performance. They offer excellent strength, toughness, and resistance to mechanical stress, making them ideal for use in various industries, including automotive, construction, and machinery. DIN 1630 NBK tubes are known for their high dimensional accuracy, smooth internal surface, and reliable performance under demanding conditions.