Can somebody give me advice on how to remove old steel casement windows. I'd like to install replacement windows by myself. But, the brochures from manufacturers of replacement windows only explain how to remove sash and sliding windows made of wood or aluminum. The job seems somewhat more complicated when dealing with steel casement windows. Do I need to remove the steel frame attached (imbedded?) to the wall opening, or just the swinging sashes and hinges? Is a reciprocating saw with a bimetal blade the tool needed? I thank you in advance.

You typically need to remove the window sash and frame.

First remove the sash by loosening the hardware.

Once the sash is removed, you will typically need to use a pry bar to get in behind one vertical frame jamb and pry it out to a point where it can be cut with a bi-metal blade on a sawzall or with a hack saw..

Once cut, remove this jamb then repeat for other jambs or just pry out.

Only then install the replacement window.