Answers

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  Can hot-dip galvanized steel strip be cleaned?

  Cleaning methods for hot-dip galvanized steel strip generally include: alkaline washing, alkaline immersion, electrolytic cleaning, and hot water rinsing. These cleaning methods can control the total amount of residual oil and carbon on the surface of the galvanized steel strip to a very low level. Moreover, the surface of the galvanized steel strip is also ground during cleaning, which to a certain extent improves the adhesion of the steel strip surface. Therefore, cleaning hot-dip galvanized steel strip is essential.

  
  
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  Can wire and coiled rebar be used interchangeably?

  While both wire and coiled rebar are common metal materials, they differ significantly in shape and application. Wire is typically straight with a smaller diameter, suitable for binding or securing, while coiled rebar is coiled into a disc with a larger diameter, commonly used in construction or machinery manufacturing. Their materials and strengths may also differ. In most cases, it is not recommended to mix wire and coiled rebar. If mixing is absolutely necessary, first confirm that their materials and strengths are compatible, and ensure that the operating environment will not affect performance. For critical components, it is recommended to use specially designed materials to ensure safety and reliability.

  
  
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  Differences between Cold-rolled round bar and Ordinary Round bar？

  1. Cold-drawn round steel (also called cold-drawn round steel, plain round steel) is a high-precision round steel. The material undergoes a "quenching and tempering" process and can be directly used to make shafts without further processing. Ordinary round steel is the common round steel used in construction. It is supplied in a "normalized" heat treatment state, and both its dimensional accuracy and material are of a standard level.
  
  2. Cold-drawn steel allows for local buckling of the cross-section, thus fully utilizing the load-bearing capacity after buckling; hot-rolled steel does not allow for local buckling of the cross-section.
  
  3. The causes of residual stress in hot-rolled and cold-rolled steel are different, resulting in significant differences in their cross-sectional distribution. The residual stress distribution in the cross-section of cold-formed thin-walled steel is bending-type, while the residual stress distribution in the cross-section of hot-rolled or welded steel is membrane-type.
  
  4. Hot-rolled steel has a higher free torsional stiffness than cold-rolled steel, so hot-rolled steel has better torsional resistance than cold-rolled steel.