Downstream processing of stainless coil mainly involves cut-to-length (CTL) and slitting:

1) CTL: uncoil → level → cut to length → stack. Key controls: leveller settings (remove waviness/crossbow), length accuracy, shear burr, surface protection (interleaving paper/film). 2) Slitting: uncoil → rotary slitting → recoil. Key controls: knife clearance (typically 5%–8% of thickness), knife condition, tension and alignment, burr control, edge quality. 3) Shared concerns: incoming flatness and thickness tolerance, surface scratches, coiling tension, packaging and marking.

Suggested quality requirements:

• Length tolerance and diagonal difference for cut sheet. • Width tolerance and maximum burr height for slit coil. • Flatness and edge quality. • Surface grade and permitted defects. • Packaging (moisture and scratch protection) and marking (coil/heat/size).

CTL and slitting amplify defects: poor incoming flatness or wrong knife clearance shows up more clearly in the finished product, so inspect both incoming material and process parameters.