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One part at a time...
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Discussion Starter #1
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.
 

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Registered
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2,135 Posts
If its magnetic its a race shaft-so i've been told.
 

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jetboataholic
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Is it magnetic? Cause the higher grade stainless steels are magnetic, I think from 400 series on up. Anything below 400 series is non-magnetic.
 

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Sit N' Spin
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1,423 Posts
I have an aquamet shaft in my pump...I believe they have AQ stamped into the end of the shaft on the splined end.
 

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steelcomp was here
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26,526 Posts
Is it magnetic? Cause the higher grade stainless steels are magnetic, I think from 400 series on up. Anything below 400 series is non-magnetic.
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%

Just some trivial info for anyone interested.:D
 

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jetboataholic
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2,798 Posts
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%

Just some trivial info for anyone interested.:D
A little more info, that is more closely related to the topic at hand.

The Type 630 or 17-4PH stainless steel that is used in the AQ shafts contains about 17% chromium and 4% nickel, thus the name 17-4. It is a Precipitation-hardening Martensitic stainless steel and is magnetic.

17-4PH
C 0.07%
Cr 15.5-17.5%
Ni 3.0-5.0%
Mn 0.8-1.0%
Si 0.3-1.0%
P 0.04%
S 0.03%
Cu 3.0-5.0%
Nb/Cb+Ta 0.15-0.45%
 

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steelcomp was here
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26,526 Posts
A little more info, that is more closely related to the topic at hand.

The Type 630 or 17-4PH stainless steel that is used in the AQ shafts contains about 17% chromium and 4% nickel, thus the name 17-4. It is a Precipitation-hardening Martensitic stainless steel and is magnetic.

17-4PH
C 0.07%
Cr 15.5-17.5%
Ni 3.0-5.0%
Mn 0.8-1.0%
Si 0.3-1.0%
P 0.04%
S 0.03%
Cu 3.0-5.0%
Nb/Cb+Ta 0.15-0.45%
I know 17-4 is used in a lot of underwater hardware like struts and fins, but I didn't know the "AQ" jet pump shafts were 17-4. So you're saying they're not "Aquamet"? Aquamet is austenitic.
 

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jetboataholic
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2,798 Posts
I know 17-4 is used in a lot of underwater hardware like struts and fins, but I didn't know the "AQ" jet pump shafts were 17-4. So you're saying they're not "Aquamet"? Aquamet is austenitic.
My bad, you're right. I was thinking of the "HP" shafts. The A/T and Dominator (late) like Tom pictured are made out of 17-4PH. Sorry about that.

What grade Aquamet are the AQ shafts made of? Because AQ 17 is a precipitation-hardening martensitic stainless steel and is magnetic. Whereas, AQ 19 is austenitic, but slightly magnetic. And AQ 22 is austenitic, and non-magnetic.

Tom, will an A/T HP shaft work in a Berkeley pump?

Thanks.:)hand
 

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546 Posts
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.
 

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steelcomp was here
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26,526 Posts
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.
Pretty much magnetic or not will tell you. Standard shaft is non magnetic, AQ shaft will be.
 

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steelcomp was here
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26,526 Posts
My bad, you're right. I was thinking of the "HP" shafts. The A/T and Dominator (late) like Tom pictured are made out of 17-4PH. Sorry about that.

What grade Aquamet are the AQ shafts made of? Because AQ 17 is a precipitation-hardening martensitic stainless steel and is magnetic. Whereas, AQ 19 is austenitic, but slightly magnetic. And AQ 22 is austenitic, and non-magnetic.

Tom, will an A/T HP shaft work in a Berkeley pump?

Thanks.:)hand
Not sure what grade Aquamet they are. I do know they're magnetic.
 
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