How much stronger are forged rods?

[oldcorollas]

Anyone care to comment on the strength of sintered rods.....the 1UZ is the only engine i can recall using them

i think the ford BOSS290? (the 5.4L) is also using them. (iirc from the motorshow)

powder metallurgy has come a long way.. it would greatly depend on the composition and the processing methods, along with the quality control....
they do use powder metallurgy to make some interesting parts around the place which are arguably under more stress than rods... but it all depends on what it's actually made of...

edit: and apparently

Ford Motor, he said, already averages about 48 pound of PM parts per vehicle, much higher than its competitors, and around 95 per cent of Ford vehicles contain powder forged (PF) connecting rods. It is estimated that more than 500 million PF con rods have been manufactured since 1986!

i guess there are a lot of them...
another source said 60% of all US rods for production cars are from PM

however they also said

"Parts makers must also consider product life cycles, which have compressed from the 'normal' 10-year cycle down to between three and five years. Sales people need to beat the bushes more and develop new applications for PM to stay ahead of the curve."

[Billzilla]

powder metallurgy has come a long way.. it would greatly depend on the composition and the processing methods, along with the quality control....
they do use powder metallurgy to make some interesting parts around the place ...

Yeah, I bought one of these a couple of weeks ago ->



Made on a 3D printer.

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[-==L=a=N=c=E==-]

at work we get our prototypes made up like that. Its quite a wicked process to watch.

similar thing can be done with plastics as well.

[jezza323]

ive seen a jewellery place make wax prototypes like that, they then use the prototypes to make a cast, pour in the gold, done!

pretty interesting

[Billzilla]

ive seen a jewellery place make wax prototypes like that, they then use the prototypes to make a cast, pour in the gold, done!

pretty interesting

How about the other one I bought?



A little harder to make that way.

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[jezza323]

i meant more the 3d printing

but they had lil v6 engine blocks and cubes in cubes in cubes sorta thing, nothing super fancy like that

[JustenGT8]

i think the ford BOSS290? (the 5.4L) is also using them. (iirc from the motorshow)

however they also said

Interesting although the SC'd 5.4 apparently runs different spec rods so the 'tough' ones might not be sintered? If they are, they take heaps so be good to know.

89-95 1UZ rods would be 'old skool' as it's the later ones that go super light and super weak....seen plenty of these break.

[clubagreenie]

early 1uz, 2uz & 3uz/1uzvvti

Ed had some pcs of his argos, Hope the new pistons visibly suit and the rings (esp at $40- EA) fit. $40USD x 3 per poton X 8 = damage to the bank balance

[clubagreenie]

and more info on metal forming

http://www.forging.org/facts/faq3.htm

[celicapain]

correct me if im wrong, but isnt titanium actually slightly weaker than high quality steel? i know that is much stronger by mass, but since most of the force on a con rod comes from controlling the piston(stretch, compress) the mass of the conrod would be less relavant than that of the piston. so you would be better of with quality steel rods and unobtanium pistons(beryliium anyone?) than titanium rods and standard forgies.
we need a metallurgist inda house

[oldcorollas]

it depends onthe titanium and it depends on the steel.
Ti has a higher melting point than steel.
it is lighter, about 55-60% the weight of steel.
strength of Ti-6-4 alloy could be between 800-1100MPa (0.2%) which is pretty strong compared to steels....
http://www.roymech.co.uk/Useful_Tabl.../Titanium.html

it depends on the steel you are comparing it to.

the mass of the conrod is also important for bending.

beryllium? and it's oxidation resistance?
it is lighter than aluminium for sure, but it is very bad for you.

if you are using titanium rods, then you are probably already using very light pistons, and are going for the last 2% of potential... ie, where cost is not really a problem

edit: i spose i should point out again that it is the fatigue strength that is most important.. even if you are talking about low cycle fatigue/overloading..
if you are keen, just find the material designations for each alloy, the search for fatigue results...

[clubagreenie]

/\ Resident in house metalurgist

[jeffro ra28]

The most important part in a titanium rod is the coating applied to them before use!
A while back at work i ordered 4 custom titanium rods, it costs $8000.

[kingmick]

The most important part in a titanium rod is the coating applied to them before use!
A while back at work i ordered 4 custom titanium rods, it costs $8000.

This is something that most people forget{coating}.The other things is that even most race people in Australia do not use titanium Rods{so you might as well talk about taking your car to Mars in the same breath as a street driven car unless you have very deep pockets}.
Valves they uses rod's are very rarely used because of cost.

It is not just the forged that makes it strong, its the design. On a forum like this you are better of listening to the people that use the forged rods if you interested in a power level and have an idea of the use.
No one on here or any other place can tell you how strong they really are unless they use and test them. They can guess, but thats all it will be!
The only way i have or ever will say it, is that a good quality forged rod, gives you more safety margin and less weight if designed properly.