A corrugated mark that is at an angle to the rolling direction and is symmetric with respect to the center line of the width of the shape appears cold rolled coil.
arc
The edge of the shape appears cold rolled coil has a discontinuous small-scale side wave shape.
Side wave
The edge of the shape appears cold rolled coil has a continuous wave shape.
1/4 wave
The undulating wave shape appears on the surface at 1/4 of the width direction of the steel strip.
It is generally caused by a large local elongation.
Medium wave
The middle of the width direction of the shape appears cold rolled coil is wavy and extends along the rolling direction.
Thickness deviation
Chemical composition % of the ladle analysis of grade SC2
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Al(%) | Ti(%) |
| Max 0.01 | Max 0.03 | Max 0.03 | 0.02 | 0.02 | — | Max 0.20 |
Width deviation
Due to the tension and the like, the width of the local portion of the steel strip is greatly different from the width of other portions.
Coronal
The shape appears cold rolled coil is thick in the middle and thin on both sides.
Wedge plate
The shape appears cold rolled coil is thick on one side and thin on one side.
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