Ahoy! So you have some pipe that needs to be bent but you don't have a pipe bender. Well no problem! This instructable will show you how to do it using sand and some creativity.
The pipe shown here is 4130 steel - 3/4" in diameter with a wall thickness of 0.035".
The point of using sand is to support the pipe (keep it round) so that it does not buckle when bent. It worked for me!
Plan ahead - the end closest to the bend will likely have to be cut off and discarded.
Step 1: Pack your pipe
The first thing to do is to plug one end of the pipe. I used a small carriage bolt that fit snugly in the end. The next step is to fill the pipe with sand. I used beach sand. The sand should be nice and compact to stop the pipe from buckling. I used a rod to tamp the sand but what really packed it in was tapping (bouncing) the pipe on a concrete paving stone.