The Minimum Bend Radius Calculator by Material is a practical engineering tool designed to estimate the smallest recommended inside bend radius for sheet metal based on material type, thickness, strength, hardness, rolling direction, and forming method. It helps engineers and fabricators reduce the risk of cracking, excessive thinning, and bend failure while selecting suitable tooling and process settings. The Minimum Bend Radius Calculator by Material is useful for press brake bending, sheet metal design, material comparison, and manufacturing process planning.

Calculator Settings

Material

mm
MPa
MPa
%
Typical range: 0.5t – 1.0t

Geometry & Forming

mm
mm

Material Comparison

Compare 2–6 materials at the same thickness. Select materials below.

Advanced Correction Factors

Strength Correction Ranges

Kadjusted = Kbase × Cstrength. Higher strength increases recommended radius.

Yield Range (MPa) Factor

Material Preset Factors

Edit default K factors for each material preset. Changes apply when you select that material.

Material K Min K Default K Max Parallel Grain
Base Minimum Bend Radius –
Adjusted Minimum Bend Radius –
Bend Radius Factor (R/t) –
Recommended Inside Radius –
Recommended Outside Radius –
Recommended Punch Radius –
Actual Radius Ratio –
Bend Radius Utilization –
Bendability Rating –
Cracking Risk –
Estimated Radius from V-Die –
Rank Material Base K Adj. K Min Inside R Punch R Bendability