Can I put steel strings on my classical guitar?
Sometimes people ask us whether they can change the sound of their classical guitar by changing its nylon classical strings for steel acoustic guitar strings.
The answer is simple: No, don't do it!!
There are several reasons why you should not change nylon strings for steel strings, but the main one is tension - steel strings have considerably more tension that nylon strings and will almost certainly damage your classical guitar, possibly bending the neck. Steel strung acoustic guitars have specially strengthened necks and bodies to cope with the tension of the strings. Also, the fretboard and frets are designed with nylon strings in mind and are not suited to steel strings.
Even if your classical guitar wasn't damaged by the tension of the steel strings, the body shape is designed to give a balanced tone for nylon classical strings and would not give a good sound with steel strings.