Increased Yield Strength

Calculation of Increased Yield Strength According to DIN EN 1993-1-3, Equation (3.1)

f_{ya} = f_{yb} (f_{u} - f_{yb}) \cdot \frac{k \cdot n \cdot t^{2}}{A_{g}} \leq \frac{f_{u} f_{yb}}{2}

A_g	Gross cross-section area
k	Deformation-dependent numerical value, k = 7 for roll profiling, k = 5 for other profiling methods
n	Number of deflections by 90° in the cross-section with an inner radius of r ≤ 5 ⋅ t (deflections below 90° are to be considered as fractions of n)
t	Design core thickness of the steel material before the cold forming, minus all metallic and organic coatings

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