w = f/fw
where f = actual force [lbs]
fw = maximum allowable unit force on an equal-leg
fillet weld equal to 1" [lbs/linear inch]
E = joint efficiency based on throat area
Sa = maximum allowable stress of the base metal
I am trying to find the correct value for the allowable stress of a weld (Sa). I am using E70XX electrodes and welding A36 structural steel I beams and angles to a SA-516-70 presure vessel shell.
My questions are as follows:
1) is the value of Sa = 21,000 psi
2) is it correct to assume an E of 1.0?
I have also seen the formula for fw written as follows:
fw = .707*w T
where fw = allowable force on the fillet weld, 1" long
w = leg size of fillet weld
T = allowable shear stress on throat of weld