Solder Butt Joint Calculator and Formulae

Solder Joint Design Calculations

Solder butt joint equations and calculator for stress intension, stress in shear, tensile stress in brazed joint.

Solder butt joint equations for stress intension,

Preview Solder Butt (End to End) Joint Strength Calculator

Allowed Joint stress in tension loading equation:

σA = SU / kT

Tensile stress in joint loading equation:

σ = F / ( b · s )

Minimum thickness of connected parts (solder line):

smin = F / ( b · σA )

Strength of solder line check:

σ ≤ σA


SU = joint strength in tension of solder [psi, MPa],
kT = tension safety coefficient (typically 2 or greater),
F = transferred force [lb, N],
b = width (minimum) of connected lumber [in, mm],
s = thickness (minimum) of connected parts (in, mm].


Kent's Machine Engineers Handbook, 12th Edition Design and Production, 1950 Colin Carmichael

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