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MotorradMike
02-08-2010, 06:09 PM
I thought I read somewhere that these pins were Titanium. Is there an easy way to tell if they are or an Aluminum/Titanium alloy?

http://farm5.static.flickr.com/4005/4335587158_310a2141b4_o.jpg


Mike

RKW
02-08-2010, 06:21 PM
Titanium is supposed to be 50-60% heavier than aluminum. Also, try a small test spot with a file. If aluminum it should be much easier to cut.

MotorradMike
02-08-2010, 06:28 PM
I can file it but it seems harder than 6061.

RKW
02-08-2010, 06:41 PM
Are you planning keeping these and continuing to use them? If not file off a small pile of chips/dust and put a propane torch to it ... titanium *really* reacts/burns brightly.

jc250r31
02-08-2010, 06:41 PM
It looks like Ti to me.

Thruthefence
02-08-2010, 06:49 PM
Purplish color? Looks like it to me, as well.

MotorradMike
02-08-2010, 06:50 PM
Are you planning keeping these and continuing to use them? If not file off a small pile of chips/dust and put a propane torch to it ... titanium *really* reacts/burns brightly.

Cool, I'll try that!


Mike

small.planes
02-08-2010, 06:52 PM
weigh it (accurately) adn measure its volume by displacement of water in a jug.
do the maths and the density will tell you.

Setting fire to it is much cooler tho :D

Dave

MotorradMike
02-08-2010, 07:09 PM
I ground some off and got sparks but not a lot. Could it be a Ti/Al alloy? 6061 Al gave me zero sparks.

I'm saving the fire thing for now. Jen just got home.

I can weigh them accurately but the volume thing will be a challenge.


Mike

luthor
02-08-2010, 07:44 PM
I can weigh them accurately but the volume thing will be a challenge.


Mike

It's quite simple Mike, here's the procedure and it is very accurate provided you have some accurate digital scales that can measure to 1/10g or prefferably 1/100g:

Tare a beaker of water (A).
Weigh sample completely immersed, but suspended in water (B). Hang from a piece of cotton.
Weigh sample resting on bottom of beaker (C).

Density = C - A/ B - A in g/cm³

Titannium and Titanium alloys are between 4.43 and 4.71g/cm³

MotorradMike
02-08-2010, 07:57 PM
I have access to a scale that measures milligrams so I can do that.

At work tomorrow.


Mike

Uncle O
02-08-2010, 08:07 PM
It will spark very bright white against a grinding wheel...

MotorradMike
02-09-2010, 09:02 PM
It's quite simple Mike, here's the procedure and it is very accurate provided you have some accurate digital scales that can measure to 1/10g or prefferably 1/100g:

Tare a beaker of water (A).
Weigh sample completely immersed, but suspended in water (B). Hang from a piece of cotton.
Weigh sample resting on bottom of beaker (C).

Density = C - A/ B - A in g/cm³

Titannium and Titanium alloys are between 4.43 and 4.71g/cm³

Did that. The scale wouldn't stay in milligrams over 100g but I pressed on and got 2.77g/cc.

I guess it's an Aluminum alloy of some sort.

madman
02-12-2010, 11:00 AM
Aluminumn>? Titaniumn? use a Q Tip dip it in muriatic acid (toilet bowl cleaner works) apply to inside of part just a small amount . Aluminumn will dissolve in muriatic. If it fizzled dump into a bowl of water . There you go.