Artisan Forge

Tube & Pipe Bending Calculator

Precision calculations for professional metal fabrication

Bend Parameters

Units

Outer Diameter (OD)

mm

Wall Thickness (WT)

mm

Bend Radius (CLR)

mm

Bend Angle (α)

°

Material

Die Width

mm

K-Factor

Auto-calculated. Click lock to override.

Flange Lengths (Optional)

Leg Length A

mm

Leg Length B

mm

Calculated Results

Bend Allowance (BA) Length of the neutral axis within the bend

0.00

BA = α × (π/180) × (CLR + K×t)

Bend Deduction (BD) Difference between flange lengths and flat length

0.00

BD = 2 × (CLR + t) × tan(α/2) - BA

Elongation Percentage of stretching on the outer fiber

0.00

Elongation % = (OD / (2 × CLR)) × 100

Elongation within safe limits

Material limit: 22%

Bending Force Force required for air bending

0.00

F = (1.33 × TS × t² × width) / die_width

Suitable for a 20-ton press brake

Total Flat Length

0.00

Flat Length = Leg_A + Leg_B + BD - (2 × CLR)

Safety Notes

Always verify calculations with physical tests before full production
Consider springback - materials may return slightly after bending
Use proper tooling and safety equipment when bending

Bend Visualization

K-Factor Visualization Shows neutral axis position relative to thickness

K-Factor: 0.42

Bend Animation Shows the bending process with neutral axis

Material Properties

Tensile Strength	400 MPa
Modulus of Elasticity	210,000 MPa
Max Elongation	22%

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