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Vintage Steel Specification
Anzaniste:
I have an Alford and Adler (British) swivel pin drawing from 1924 which in the material specification box it shows “ubas” (the “u” could possibly be an “a”).
In the main body of the drawing it says “Case harden to usual C.H.S. specification”
I have a good idea what steel to use for the application but I would love to know what “ubas” actually stands for.
Has anybody out there got the answer?
David Jupp:
Google revealed a couple of refernces to ubas steel in products - apparently produced by Acid Open Hearth, with low levels of 'metalloids' to avoid shortness/piping.
My guess is it was a brand name used by a particular steel maker, probably didn't actually stand for anything.
Lew_Merrick_PE:
Anzaniste -- I don't remember the details (not having run across the ubas designation in many years), but I believe that David is right about it being a currently sexy process designation from many years ago.
Low carbon (i.e. < .30% carbon or lighter carbon content than 1X30 such as 1030) steel is what is normally case hardened. Unless the part is under either repeated impact loading or an abrasive slide loading you can probably just use a tool steel (silver steel on your side of the pond) pin that you heat treated directly. The main advantage of case hardening a part is that you get a very hard surface without the brittleness associated with full-hard, fully-hardened parts.
Fergus OMore:
I have an odd note which might be relevant. It comes from the drawing for L.H.Sparey's Collet set described in his Amateurs Lathe book.
'Make collets from collet steel or Nickel Steel, such as from Old Car Back Axles' Somewhere( but where) he uses lorry half shafts.
My own cherished possession is a prize bar made by my father from a Swedish windypick blade.
Pre-WW2, of course.
doubleboost:
--- Quote from: Fergus OMore on April 06, 2012, 07:48:56 AM ---I have an odd note which might be relevant. It comes from the drawing for L.H.Sparey's Collet set described in his Amateurs Lathe book.
'Make collets from collet steel or Nickel Steel, such as from Old Car Back Axles' Somewhere( but where) he uses lorry half shafts.
My own cherished possession is a prize bar made by my father from a Swedish windypick blade.
Pre-WW2, of course.
--- End quote ---
I have a 5 foot bar that was once a hard rock drill it is hexy with a hole through the centre
Has served me well for a good few years
John
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