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Mild steel splits into CR, HR and HR P&O, stainless into 304 and 316, and aluminum into 5052 and 6061, so no thickness carries a grade it is not sold in. Gauge thicknesses use MaterialLedger's decimals, which also corrects stainless gauges that used carbon-steel values. Every thickness gets a 60 degree line lead-in (0.15", longer from 1/4" up) and a 0.1" lead-out, with no lead-out on inside cuts, a 0.75 cut-off overtravel and every catalog plate size up to 72x144. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>