Fred-
A number of steels will work for your application, as already mentioned by others. I suppose a great deal of what you end up using depends upon the tools/resources you have available. Some of the old saw blade steels are great as they are. For those who don't want to worry about quenching and tempering, hardened steels can be cut and ground out, but care must be taken not to heat up the steel, which can cause the hardness to be lost. Just go slow and have a little "dunk tank" with water nearby to keep sticking the steel in to cool it as you go. On the other hand, if you have a torch setup and want to, you could certainly quench and temper your points without much difficulty at all.
Some may not agree with this, but I've heard of guys using soft steel (hasn't been quenched and tempered) for their points. Just because it hasn't been hardened doesn't mean it won't take an edge. That being said, when you hit a rock or something else hard, it will obviously damage that edge. But, a sharp point only HAS to be used once on that critter and cut nicely, that one time to get the job done. If it did it's job and your arrow is still useable, check and see if the head is too and just put another edge on it. I haven't done it that way, but can understand the logic behind it. Just my $.02
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Jeremy