Calculation of creep relaxation of stresses in flange bolts
Attention!
This calculation is only a simplified estimation, and does not replace a detailed design calculation.
Input data
Material
1.4903 X10CrMoVNb9-1
1.4905 X11CrMoWVNb9-1-1
1.4922 X20CrMoV12-1
1.4961 X8CrNiNb16-13
1.4980 X6NiCrTiMoVB25-15-2
1.4986 X7CrNiMoBNb16-16
1.7335 13CrMo4-4
1.7380 10CrMo9-10
1.7709 21CrMoV5-7
1.7715 14MoV6-3
1.7745 15CrMoV5-10
Chromstahl
Kohlenstoffstahl
Nichtrostender Stahl
Root diameter of a bolt
d
3
mm
Number of bolts
n
B
Design temperature
T
d
°C
Design life
t
DL
h
Required bolting force at the end of life
F
EoL
kN
or
Tensile stress at the end of life
σ
EoL
MPa
Calculate
Results
Required bolting force at the start of life
F
SoL
kN
Tensile stress at the start of life
σ
SoL
MPa
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