Tensile Strength Test
Tensile Strength Test
(OP)
I am currently working on a renovation project. Building was built in the early 70's with a renovation being done in the early 80's. The owner would like to add some load to an existing steel beam and we were unsure of the strength of the material. The owner decided to cut a piece of the beam and send it to the lab for testing. The lab came back with the following:
Ultimate Strength = 65,500 psi
.2% Yield Strength = 48,300 psi
So, I have been taught to use the .2% yield number which would be 48.3 ksi however, this number is a little odd as it is short of the 50ksi one would expect. Is this normal for these types of tests? I'm inclined to use a value of 48ksi but I am not sure.
Ultimate Strength = 65,500 psi
.2% Yield Strength = 48,300 psi
So, I have been taught to use the .2% yield number which would be 48.3 ksi however, this number is a little odd as it is short of the 50ksi one would expect. Is this normal for these types of tests? I'm inclined to use a value of 48ksi but I am not sure.






RE: Tensile Strength Test
RE: Tensile Strength Test
It is slightly more difficult than the explanation, just wondering what to use based upon the actual test results.
RE: Tensile Strength Test
Since you have no product information, and you do have a 48kis test in hand what assumptions can you make? Are you safe using anything over 45ksi?
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P.E. Metallurgy, Plymouth Tube
RE: Tensile Strength Test
the statement that coupons from different areas of the same beam may yield different results is disconcerting. It is a judgement call, and if you are comfortable with one tensile test, then go for it. You could also do a load test program.
RE: Tensile Strength Test