Aluminum Piston Material sources?

Help Support HMEM:

raym 11

Well-Known Member
Joined
Jul 21, 2007
Messages
147
Reaction score
0
Thanks for the article
Kenny. I need all the help I can get.
My latest build was the VAL (#15&16 Model Engine Builder). Photo in issue #20.
It has a 1.124 bore. I used 4032 and allowed .0015 clearance using the criteria atwww.eriperformace.com. The engine turns ~9k .
I often build less demanding engines and try different materials as a test platform. Only one to destruction so far. ;D What a hobby!! ::)

Ray M
 

1Kenny

Well-Known Member
Joined
Jul 9, 2007
Messages
538
Reaction score
2
Here is what Alcoa says about the 4032. It has pictures of the grain too.

http://www.alcoa.com/gcfp/catalog/pdf/alcoa_deltalloy_4032.pdf

I have had a few beers with one of the engineers at KB. He has told me that he has run as little as .0005 clearance with the hypereutectic pistons with a 4" bore on an air cooled engine. To do that, the bore needs to be straight and round using vertical boring. Gravity pulls the stone down and will oblong the bore when done horizontally. The bore needs to be smooth. Almost like it is polished with so lite of a 60 degree cross hatch your mind will question if that is right.

Kenny
 

Kaleb

Senior Member
Joined
Jan 3, 2010
Messages
272
Reaction score
27
I am using an aluminium piston in my steam engine build, and I go to a shop called Bearfast, which deals in general tooling and industrial supplies, for all my brass and aluminum. A 300mm length of approx. 12mm diameter aluminium bar can be had there for about AU$5.
 

Latest posts

Top