Causes of Scratches on Cold Drawn Seamless Steel Tubes

1. Manufacturing Defects: Poor manufacturing processes or equipment maintenance can lead to scratches during the cold drawing process. This might include defects in the drawing dies or improper lubrication.

2. Handling and Transportation: Scratches can occur during handling, loading, unloading, or transportation of the steel tubes. Rough handling or contact with abrasive surfaces can result in surface damage.

3. Storage Conditions: Improper storage conditions, such as stacking tubes without proper protection or exposure to harsh environmental elements, can cause scratches on the surface of the tubes.

4. Tooling Issues: Problems with tooling or equipment used during processing, such as burrs or sharp edges, can cause scratches when the tubes come into contact with these surfaces.

5. Foreign Debris: Presence of foreign debris or contaminants on the surface of the tubes or in the processing equipment can lead to scratches during the cold drawing process.

6. Material Properties: In some cases, the material properties of the steel itself, such as hardness or surface roughness, can contribute to the susceptibility of scratching during processing or handling.