I bought a driveshaft and would like to know if it is an AQ or just stock. It looks a little different from the one I had already that was out of a 12JC-A. The splines are different and so are the ends. Can anyone tell me the differences? Here are pics of the newer one.
The magnetic properties of stainless steel are very dependent on the elements added into the alloy, and specifically the addition of nickel can change the structure from magnetic to non-magnetic. There are different grades of Aquamet as well, with the nickel and manganese being the biggest difference (between AQ 18 and 22)
Here's some comparisons for grins. Notice the big differences between Aq 18 and 22 in the Manganese and Nickel.
316 stainless
C <.03%
Cr 16-18%
Ni 10-14%
Mo 2-3%
Mn <2%
Si <1%
P <.045%
S <.03%
AQ 18
C <.15%
Cr 16.5-19.5%
Ni .5-2.5%
Mo ----
Mn 11-14%
Si <1%
P <.04%
S <.03%
AQ22
C <.06%
Cr 20.5-23.5%
Ni 11.5-13.5%
Mo 1.5-3%
Mn 4-6%
Si <1%
P <.04%
S <.03%
now that we know what the shaft may be made of and that it may be magnetic or not is there a definitive way to easily find out if it is the better shaft. i,ve seen tons of shafts that have no markings, would a hardness test be a better method of telling what the shaft is.
So if the shaft is magnetic it is the good one? I checked the one in my boat, as well and the one in my parts pump and they are both magnetic. Both are dominator pumps. Just dumb luck that they are good, or am I missing something here?sphss
The dominator shafts are a different type of stainless (17-4PH), than the Berkeley shafts (Aquamet). I'd say that since Dominator pumps are a more performance geared pump to begin with, that they only have the one type of shaft, and they're all made out of the good stuff, but I may be wrong.
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