Material Used for Internal Circlips?

Try here, reading a little way down. (I got here by Googling "circlip material")

Spring or harden steel for both internal and external circlips

Thanks

But can you give me details which will be better as there are many grades in spring steel.

That really depends on your application.

If you don't know what the material is that is used to make them, what good will it do you to have the information. Just order the bloody things and use them.

It's steel.

And here's a selection matrix with pictures. _{Have fun!}