AISI 1050 HRc 50-55 material substitute 1

[hodge1]

Hello,
I have been watching this forum for months and find it very informative. I finally need some help and thus my post.

I am making a bearing race and the print calls for AISI 1050 HRc 50 to 55. I am having trouble finding AISI 1050 in 6" diameter and I am looking for a material substitute with similar properties.

I thought about using AISI 1045 and heat treat to HRc 50 but have been told that this is a bad idea due to brittleness.

Any suggestions would be much appreciated.

 

[dbooker630]

SAE 1045 would typically be tempered at 375-400F for the hardness range noted. You would probably want the manganese on the high side, .80-.90% Mn to ensure improved quenching response. Can you induction harden this part?

 

[JoeyV87]

X38CrMoV5-3, when hardened (~1040°C, oil quench), would give you the right properties. As above, Mn, C and Cr towards the top end.

 

[hodge1]

I see no reason why this part could not be induction hardened. The part is fairly thin walled.

Does X38CrMoV5-3 have any galling issues?

 

[JoeyV87]

In short: good question! I'll look into that if I get time in the next day or two

 

[hodge1]

Take your time and thanks for the help.

 

[unclesyd]

I would look at 52100 steel for bearings. Check with suppliers like Sullivan Steel Service for your material as they usually have drops for one offs or small lots.
They also carry other steels that can substitute for your steel.

http://www.52100steel.com/products.html