When the joint of the welding lead cold rolled steel coil tape is wound into a steel coil, the full width linear trace of the weld bead on the surface of the welding lead cold rolled steel coil is generally increased gradually, and the degree is gradually reduced.

Single-sided protrusion formed on the surface of the welding lead cold rolled steel coil, point-like, appearing equidistant along the rolling direction, the spacing is about 150mm;

Along the rolling direction of the welding lead cold rolled steel coil is elongated or short coils equidistant, with a spacing of about 150mm;

Along the vertical direction of the steel strip, welding lead cold rolled steel coil is elongated or short strips, and the spacing is about 150mm.

Due to the roll change, the stop roller has a straight line of full width left on the surface of the steel strip, and generally the thickness of the front and rear will be too large.

Quality	GB/T 11253-2007 GB/T 5213-2001	JIS G3141-2005 JIS G3101-2004	EN 10130-2006 EN 10139-1998 DIN 1623-1986	ASTM A1008 / A1008M-05
Drawing Steel	SC1 SC2 SC3	SPCD	DC03/ ST13	DS TYPE A/B
Deep Drawing Steel	SPCE	DC04/ ST14	DDS