P & V values for Grey Iron Plain Bearing

[DAVIDSTECKER]

Doe’s any one know of any P, V, and PV numbers for Grey Iron like those for other plain bearing materials such as those for 660 Bronze?
I am primarily interested in Class 20 or 30, but any information would be appreciated.

 

[unclesyd]

I've looked through several books and catalogs and can't get a warm fuzzy feeling about a workable number.

A short consensus of several sources gives a value of 23,000 for nonlubricated steel on cast. Another consensus value for perodic lubrication is 46,000.

Like a lot of materials the CI has startup problems both from the lubrication and friction standpoint. It takes a little lubricant to get it going.
Steel on CI
Light coat of oil them wipe off, no penetration.

[ul]
PSI f
125 .166
186 .300
226 .166
260 .300
298 .333
336 .349
370 .344
385 .347
448 .351
485 .353
523 .354
560 .356
600 .357
633 .358
672 .359
710 .367
785 .403
800 abraded
[/ul]