EDGES
COPPER BASE ALLOYS – Slit, Slit and Edge Rolled, Sheared, Sawed, Machined.
SHEET STEELS OR ALUMINUM SHEET – Mill Edge, Slit Edge or Sheared Edge.
STRIP STEELS and STAINLESS STRIP
No.1 Edge –
A smooth, uniform, round or square edge, either slit or filed or slit and edge rolled as specified, width tolerance +/-,QQ5”.
No.2 Edge –
A natural round mill edge carried through from the hot rolled band. Has not been slit, filed, or edge rolled. Tolerances not closer than hot-rolled strip limits.
No.3 Edge –
Square, produced by slitting only. Not filed. Width tolerance close.
No.4 Edge –
A round edge produced by edge rolling either from a natural mill edge or from slit edge strip. Not as perfect as No.1 edge. Width tolerances liberal.
No.5 Edge –
An approximately square edge produced by slitting and tiling or slitting and rolling to remove burr.
No.6 Edge –
A square edge produced by square edge rolling, generally from square edge hot-rolled occasionally from slit strip. Width tolerances and finish not as exacting as No.1 edge.