Thread: Soft Aluminium Alloy

They use a tester that is basically bouncing a ball bearing on the surface. The harder the material the higher it bounces. Probably has a proper name but I'm not sure what it is.

Steve

Leeb rebound hardness.

Leebs still marks/indents the surface maybe not as much as the other indent types though .

Originally Posted by steveG

They use a tester that is basically bouncing a ball bearing on the surface. The harder the material the higher it bounces. Probably has a proper name but I'm not sure what it is.

Steve

Thanks , i`ll see what the net can tell me about rebound or ball rebound but i guess they still mark the surface .

I read of head surfaces been tested but never a mention of where the bolts mate .

Seems the destructive types are accurate but not much help if you still what to use the piece .

Its a small ball bearing, generally if you are having a head tested you will get it skimmed after is passes or bin if it doesn't.
When i had my tdi head done last year you couldn't see or feel where the tester was used.

Can be done digitally now
Cylinder Head Hardness | Southside Cylinder Heads, Engine Reconditioning Australia

Originally Posted by Tombie

Can be done digitally now
Cylinder Head Hardness | Southside Cylinder Heads, Engine Reconditioning Australia

Still Leeb though so marks the surface , from searching diamond tipped how ever they read .

That`s a good link , it says they only test in 3 places .

Originally Posted by loanrangie

Its a small ball bearing, generally if you are having a head tested you will get it skimmed after is passes or bin if it doesn't.
When i had my tdi head done last year you couldn't see or feel where the tester was used.

Did you see them test your head ?

Do you know how many places they checked ?

Did they give you a figure as to why or why not to use the head ( most likely converted to brinell scale ) or did they say it was good or not without explanation .