Brass K-Factor
Brass K-factor is setup-specific. Alloy, temper, grain direction, bend radius and tooling determine where the neutral axis falls.
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Brass is not one material
Cartridge brass, naval brass and other copper alloys do not share one bend response. Temper and grain direction matter strongly.
Coupon workflow
- Cut a strip from the production sheet.
- Bend it with the production tooling.
- Measure the flat length and outside legs.
- Solve K and reuse only for that setup.
Formula
BA = theta * (R + K * t)
Related pages
- Sheet-metal K-factor calculator - back-solve K from a measured bend allowance or coupon.
- Bend allowance calculator - use a known K-factor to calculate bend allowance.
- Bend deduction calculator - convert between outside dimensions and flat length.
- What is K-factor? - neutral-axis explanation and formula context.