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"Dick" wrote in message
...
Help an old mind come to the correct conclusion G.

The situation is (2) steel straps side by side and fully in contact with a
bolt hole at each end . One is 4130 with about 80,000 psi tensile and the
other a heat treated 4130 to a 124,000 psi tensile strength.

Is the combination strength 80,000 or 124,000 or
204,000 psi tensile??

Thanks, Dick



GOD NO

Tensile strength is stated in PSI per unit area, usually a square inch.
If you think about this for a minute, ask the question.
How can 2 pieces of metal, one that will carry at most
124KSI, carry 204 KSI if each of them will have failed
way before reaching that load??
You can't add them up. You need to look at the applied
load, figure the differences in elongation and what it will
do to the joint. This isn't particularly hard, you just need to
look at the charts and do the math. There are many good
books out there......