Learn more about bend allowance for your manufacturing sourcing needs in China.

Learn more about minimum bend radius for your manufacturing sourcing needs in China.

Learn more about springback for your manufacturing sourcing needs in China.

Guide / Sheet Metal Bending

Sheet Metal Bending

Bend allowance calculation, K-factor, springback compensation and press brake tooling

Bend Allowance

BA = (π/180) × (R + K×T) × A. K-factor: R < T → 0.30; R > 4T → 0.50. Steel: 0.35-0.45; Al: 0.33-0.42.

Mild steel: 0.5T, hard steel: 1.0T, Al 5052: 0.5T, Al 6061: 1.5T. Bend perpendicular to grain.

1-3° (mild steel), 2-5° (6061-T6). Coining (>8× tonnage) eliminates springback.