Anyone with access to GE EMPIS (Even an old one?)

[rbrooks8]

Hello!

First post is asking for a favor. I'm looking at an old GE material spec, B50T1145. Circa 1964! Apparently a part has gone obsolete and I'm being asked to quote an equivalent replacement, just need to know what it is first. Gut feel is a M50 NIL of sorts, but if someone has access I'd be forever appreciative.

Thanks much!

 

[tbuelna]

M50 NIL (AMS 6278) is a high-performance bearing steel. Is this part used in a rolling element bearing?

 

[metengr]

Is this material specification for a part from a steam turbine, pump or gas turbine?

 

[rbrooks8]

Hello. Yes, it's a bearing. Main shaft for a flight motor. It's one of the primary areas of operation for our company (Bearing manufacturer).

 

[tbuelna]

That 1964 GE spec has likely been superseded. This [link customer.cartech.com/assets/documents/datasheets/CBS-50_NiL.pdf]data sheet from Latrobe for premium aircraft quality M50NiL bar[/url] lists the current GE equivalent as B50TF211. However it might be that the spec you noted is for a specific material form such as a rolled ring.

I'm sure if you gave an aerospace material supplier like Latrobe a call they would be happy to help you find a suitable current equivalent for your quotation effort.