How accurate are calculated round bar weights?

Theoretical weights assume nominal diameter and standard density. Actual mill tolerances introduce ±2–3% variation. For inventory valuation, theoretical weight is acceptable. For shipping or load calculation, use actual weigh scale reading.

Does hex bar use the same formula?

No. Hex bar weight = (Width across flats² × 0.866 × 0.222) for steel, per foot. The 0.866 factor accounts for the hexagonal cross-section being 86.6% of the circumscribed circle area. Always use the specific hex formula rather than approximating as round bar.

How do I account for cut-off and saw kerf in length estimates?

Subtract 0.125–0.250 inches per cut for saw kerf plus an additional 0.5–1.0 inch for end cleanup from the original bar length. For high-value materials like stainless or brass, marking and tracking cut-off drops can recover 2–5% of material cost. ⚡ Calculated for Carbide-Tooling.com High-Performance Series. View Catalog →

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