L-angle
Carbon steel
Equal angle (hot-rolled)ISO 657-1 (JIS G 3192)An angle whose two legs are the same length. It is the most common and the easiest to obtain, and is the place to start when you are unsure.Unequal angle (hot-rolled)ISO 657-1 (JIS G 3192)An angle whose two legs differ in length. Choose it where the mounting face is narrow, or where you want more section performance in one direction.Unequal angle with unequal legs and thicknesses (hot-rolled)ISO 657-1 (JIS G 3192)An angle whose two legs differ in both length and thickness. Choose it when neither the equal-leg nor the unequal-leg section fits.
Stainless steel
Equal angle (hot-formed)ISO 16143-2 (JIS G 4317)For structural members that need corrosion resistance. This is the base standard for stainless steel angles.Unequal angle (hot-formed)ISO 16143-2 (JIS G 4317)A stainless steel angle whose two legs differ in length. Choose it where the mounting face is narrow.Equal angle, stainless steel (cold-formed)JIS G 4320An equal-leg angle formed by bending plate. It is thinner and lighter than the hot-formed section.Equal angle (for building structures, hot-formed)JIS G 4321For structural members of buildings where seismic design is involved.Equal angle, stainless steel (for building structures, cold-formed)JIS G 4321For building structures where a thin, cold-formed section is needed.