What temperature do old flat irons go up to?

The temperature of a flat iron varies depending on the specific model and setting, though the general range is between 175 and 400 degrees Fahrenheit. Some websites, such as Overstock, sell flat irons with a maximum heat setting of 450 degrees Fahrenheit.

WebMD cautions against using flat irons at temperatures above 400 F in order to prevent damage to hair. Total Beauty recommends using a heat setting between 250 and 300 F for fine or damaged hair, 300 and 350 F for medium or average hair, and 350 and 400 F for thick or coarse hair. Irons with ceramic, tourmaline or titanium plates are also recommended for even heat distribution.