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I need to know how much stronger in percentage it is over steel. Any of you claiming to be engineers know this.
 

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im no engineer, but im sure you would get a better answer if you posted an application.

it is my understanding that it has similar properties to aluminum in terms of fatigue and such? but i could be way off
 

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I thought it was roughly twice as stong for a given mass....

It is also 45% lighter than steel per given mass....

So you can build something out of 1/8" Ti to replace 1/4" steel and it should be just about as stong.

This is all off the top of my head...

Plastics are kinda cool too depending on what you are building.
 

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If your thinking of making links out of it, you better have DEEP pockets!

Titanium 6Al-4V
Round 1.5" solid bar 120.00/ft!


Titanium 6Al-4V
Round 1.75" 160.00/ft
 

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Way better than aluminum in fatigue. Very strong, difficult to fab. Must be welded in an inert atmosphere. 6-4 is the grade you're most likely to come across. Difficult to machine, like stainless you gotta keep your tools sharp.

How much strong than steel? Which steel, mild or Aermet?

http://www.timet.com/6-4frame.html

Roughly 2/3 the weight of steel (alum. is roughly 1/3 weight of steel) Modulus of elasticity is also roughly 2/3 of steel (and alum. has roughly 1/3 rigidity of steel).

So you can build something out of 1/8" Ti to replace 1/4" steel and it should be just about as stong.
Scary generalization.:eek:
 

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I always though titanium was weaker then steel, but was usueful because you could use large enough pieces to have strength increase and weight reduction. I will try to look this up tonight when I help my friend with physics
 

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This site has allot of info on Ti. but it is mostly about using it in marine applications ans doesn't really cover your question but it gives allot of info about strees, thermal and corrrosion. http://www.mmi-marketing.com/tico/paper.pdf
 

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Not sure if this helps due to the application, but I broke my leg last year and now have a titanium rod in my shin. The doctors said it was 200% stronger than steel, but I do not know if that is very accurate or they were just giving me a number.
 

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I think one of the big reasons they use titanium in bodies is that it doesn't corrode.

I have a watch made out of it, it looks nice that's about all I know about Ti
 

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The strongest Titanium, 611, has a tensile strength of 150,000 or so. The strongest steel goes up to 300,000
 

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DemoMike said:


I had to settle for a Ti bottle opener.
LOL My sunglasses are Ti :D 250.00 but way cool
 

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Let me give you another instance.

My steel (chromemoly) road race frame (bicycle) cost 1100 for roughly 4.2 pounds (with fork)

A Ti one exactly like it in dimensions (without fork) would be around $3500.00

That's without components or wheels.

Titanium is generally more flexible than steel. I.E. it is less rigid than steel. However it's strength to weight ratio is very high.



j
 

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Mieser said:


It is also 45% lighter than steel per given mass....

Huh? So if I have a given mass of steel, say 1kg, and a given mass of Ti, also 1kg, the Ti is somehow 45% lighter than the steel? Interesting theory....
;)
 

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"TIMETAL 551 is not normally regarded as weldable" Anyway it also says that the highest tensile of 551 is 203,000 still not even close to the strongest alloy steels.
 

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I hate cutting 6AL4V:flipoff2:
 

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Go knock yourself out with numbers at these links....

A good source of material properties.
http://www.matweb.com/search/SearchSubcat.asp


Specific info on Ti 6-4
http://www.matweb.com/search/SpecificMaterial.asp?bassnum=MTP641

Low carbon "Mild" steel (1020)
http://www.matweb.com/search/SpecificMaterial.asp?bassnum=M1020A

Good Stuff.
http://www.matweb.com/search/SpecificMaterial.asp?bassnum=M434AV

If these number don't mean anything to you, don't worry about titanium. As the general theme above states...pound for pound, titanium is not generally stronger. The benefit is its specific strength (strength over density) is typically better.
 

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87YJ said:



If these number don't mean anything to you, don't worry about titanium. As the general theme above states...pound for pound, titanium is not generally stronger. The benefit is its specific strength (strength over density) is typically better.
Bingo.

In the bike world, you have to do a lot of funky tubing shapes/draws with varying thicknesses to even come close to the rigidity of steel.

Ti is great for CNC shiat, but sucks for tube IMHO.

j
 

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About all i could tell you is that the chit is $$$$ & it they love to put that stuff in airplanes.
Oh yeah its a pain in the ass to weld also.
just my $.02
 
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