The surface quality of0.72～0.82C φ5.5 mm wire for steel cord af tyre produced by different producers at home and abroad was tested and examined. The results showed that surface of wire produced at moet producers has no de- carburized  layer  and  average  thickness  of  oxidizing  scale  layer  was  ≤7.7  μm  with  thickness  difference  ≤1.13  μm

in which the Fe

3

O

4

content was equal to FeO content to be available to remove scale of surface

and only there wa decarburi- zed  layer with  depth  0.05～0.10 mm  for wire produced  at very  few  of producers

and  average  oxidizing  scale  layer was 12.47  μm  with  thickness  difference  ≤1.84  μm.