Aluminium engine hangers.

[billdn]

Some while ago I acquired in  box of bits, some aluminium engine hangers  the triangular ones at front of engine, that connect to front down pipe. While I'm waiting for rebore was having a sort out and thought bet they'd polish nice, and they have. But never seen them before,   they are exact copies of the originals.
In my head aluminium is a strong lightweight metal , would they cope with weight/ stresses etc while in use.
I know not standard but I do like a bit of being.

[McCabe-Thiele (Ted)]

My first thought is there are different grades of alluminium with varying metallurgic specifications.
The original steel ones are pretty thin so I suspect they are more of a steadying mount against vibration & torque movement.
I would expect alloy ones to be substantially thicker - they might have a high Titanium content to compempsate - do you know who made them?

[billdn]

No idea Ted, and they are only as thick as the original metal, which I still have BTW.

[McCabe-Thiele (Ted)]

Are you sure they are not Steel/Titanium defo Alluminium?

[amx1992]

I bought a job lot of 400 bits a couple of months ago and there were some ali front engine brackets, so cant be that uncommon

[K2-K6]

Yes, different strengths of alloy are available.

Commonly referred to in engineering as "Duralumin" being most likely as most workshop would have it available easily.

Quote "After heat treatment and aging, these alloys are comparable to soft steel in strength." from https://www.britannica.com/technology/duralumin indicates it's material strength.

Amusingly used in skis for torsional interlayer and marketed as "Titanal" seems a contraction of Titan-aluminin but often misinterpreted as "Titanium" which the marketing people appear to encourage by association to advance their cost margins. Also a more earthy nickname of "tight-anal" for those wishing to poke fun at it 

[K2-K6]

And the ski product

https://unofficialnetworks.com/2019/12/22/what-exactly-is-titanal-a-look-at-the-metal-that-powers-the-ski-industry/#:~:text=The%20short%20answer%20is%20Titanal,AMAG%20or%20Austria%20Metall%20AG.

Appears a core advertising "falsification" to me, many believe they really are buying titanium which would likely make their products about  3 times as expensive if true. Don't you love tenuous marketing 

[Moorey]

 It was common must have Duralumin engine mounts back in the day for race bikes and building specials like Tritons etc.

[McCabe-Thiele (Ted)]

They sound cool to look at without pics or a polish by Oddjob.