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!}

It really depends entirely on your application—load, shaft hardness, corrosion resistance, all that. But if you're just looking for a solid starting point, most internal circlips are made from spring steel like C67 or C75S, often with a phosphate or zinc coating. I've had good luck with those for general use.For detailed grade info and size ranges, I usually check the spec tables here . They break down the material options pretty clearly for both metric and inch sizes. Should help you narrow it down.And honestly, if you're still unsure, just call a supplier and give them your working load and groove dimensions—they'll point you to the right alloy.

I’ve run into the same question when replacing worn internal circlips on older tools and small machinery. Material choice really depends on the job — stainless is nice for corrosion resistance, but spring steel usually holds up better when you need more snap and strength. I’ve also found it helps to check the groove size before buying, since an m3, m4, or m6 circlip can look similar but won’t fit right. For anyone sorting through sizes, I keep a few common options handy and use this circlip collection as a reference. A good pair of circlip pliers makes the install much less frustrating too.