aluminum vs steel

[smartin1]

I'm a little confused and i would appreciate if someone could enlighten me on how there are some claims of certain manufacturers that the strength or load bearing capacities of aluminum I beams can surpass steel I beams? is that false advertising or can that statement ring true?

Please help.

[RocketSci5KN]

Could well be true; it all depends on the alloys and dimensions of the I beam itself.

[smartin1]

Could well be true; it all depends on the alloys and dimensions of the I beam itself.

can you provide any examples to clarify?

[Astronuc]

Example of high strength Al alloys - http://www.vtol.org/f65_bestPapers/structuresAndMaterials.pdf

It depends on the alloy, composition, heat treatment (annealed vs cold worked, stress-relieved), and component geometry.

One can find annealed steels or cold-worked steels, as well as high strength steels.