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Old 04-11-05, 06:28 PM   #1
phantomcow2
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cost of titanium stock

Im interested in making a bolt from titanium in my machining class as my next project. Does anybody know pricing for round titanium stock?
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Old 04-11-05, 06:42 PM   #2
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From McMaster, just a couple of examples:

Titanium Grade 2 Rod 5/16" Diameter, 1' Length
In stock at $16.55 Each

That oughta be enough to machine a 1/2-20 bolt out of.

Titanium Grade 5 Sheet .063" Thick, 24" X 36"
$916.57 Each. Usually ships within 2 weeks.

So what you can do is, get the 24x36 sheet, bend it into octagonal tubes, weld them together, and voila, homemade litespeed!
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Old 04-11-05, 06:45 PM   #3
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Quote:
Originally Posted by slvoid
From McMaster, just a couple of examples:

Titanium Grade 5 Rod 1" Diameter, 6' Length
In stock at $493.30 Each

Titanium Grade 5 Sheet .063" Thick, 24" X 36"
$916.57 Each. Usually ships within 2 weeks.

So what you can do is, get the 24x36 sheet, bend it into octagonal tubes, weld them together, and voila, homemade litespeed!
That's one long bolt!

You might call around to scrap metal places, and see if they have bits and pieces of material lying around. Or a local machine shop.
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Old 04-11-05, 06:47 PM   #4
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Originally Posted by ofofhy
That's one long bolt!

You might call around to scrap metal places, and see if they have bits and pieces of material lying around. Or a local machine shop.
LOL, i revised it, he can order 1ft stock instead of 6ft.
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Old 04-11-05, 06:55 PM   #5
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Don't forget to look up Ti on your feed and speed chart. It is harder than stainless steel, so go slow and pour on the coolant. Get the hardest and newest tools also.
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Old 04-11-05, 07:02 PM   #6
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yea they have tools to cut titanium they have done it before. But the school obviously wont supply that becuase of the price. I only want maybe a 1 foot round stock maybe 1/2 inch in diameter. I will check local shops
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Old 04-11-05, 07:16 PM   #7
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Originally Posted by Shifty
Don't forget to look up Ti on your feed and speed chart. It is harder than stainless steel, so go slow and pour on the coolant. Get the hardest and newest tools also.
Second on the coolant. I almost scrapped out a whole batch of barstock when some maroon used a chop saw without coolant to get the metallurgical samples. It buggered up the microstructure pretty bad.
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Old 04-11-05, 07:19 PM   #8
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I have worked with this guy before, prices are reasonable. http://titaniumjoe.com/
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Old 04-11-05, 07:26 PM   #9
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Quote:
Originally Posted by phantomcow2
Im interested in making a bolt from titanium in my machining class as my next project. Does anybody know pricing for round titanium stock?
phantomcow2 - I see you already have Joe's addy - how about this one http://metals.about.com/od/tubesuppliers/

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Old 04-11-05, 07:28 PM   #10
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Quote:
Originally Posted by ofofhy
Second on the coolant. I almost scrapped out a whole batch of barstock when some maroon used a chop saw without coolant to get the metallurgical samples. It buggered up the microstructure pretty bad.
To get good microstructure, use a diamond wheel with a LOT of oil. Then grind at 100-220 grit for like 30 minutes on the polisher.
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Old 04-11-05, 07:37 PM   #11
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ooh thats right. ANd i just learned they have a polishing machine today. FUn fun
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Old 04-11-05, 08:16 PM   #12
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Quote:
Originally Posted by slvoid
To get good microstructure, use a diamond wheel with a LOT of oil. Then grind at 100-220 grit for like 30 minutes on the polisher.
Yeah, the supplier was cutting the samples for us and mounting and polishing them. Just to save us time as we didn't have a full time tech. I guess they had a new guy or something. It was a huge batch that we would have had to send back.
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Old 04-11-05, 08:17 PM   #13
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I'm not sure why you would need to examine microstructure in a metal shop class, but here's how i usually do it.
Use a diamond disc real slow to get the surface of the sample relatively smooth. Move onto the polisher at 220 grit for about 30 minutes. Then wash and rinse everything as clean as possible. Rinse it with alcohol. Demagnatize if material is magnetic, switch to 1200 grit disc, rinse and repeat. Then move onto cloth discs with 10 micron and then 1 micron. Finally, polish with .01 micron alumina and you now have a telescope grade shiny piece of steel. Etch to reveal grains and now you can see the microstructure.
Whatever you do, keep your sample clean and never ever transfer anything from one stage to another.
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Old 04-11-05, 08:22 PM   #14
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Quote:
Originally Posted by ofofhy
Yeah, the supplier was cutting the samples for us and mounting and polishing them. Just to save us time as we didn't have a full time tech. I guess they had a new guy or something. It was a huge batch that we would have had to send back.
Even if they did it using a chop saw, couldn't you put it inside the polisher and run it for like an hour on 100 larger grit?

Where I used to work, we had a struer like this:
And yea... complete with cheap kitchen timer.
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Old 04-11-05, 09:42 PM   #15
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No auto polisher, and in an FDA controlled environment, the QC folks demanded a separate sample. This was a big stink until they figured out what went wrong on their end. Even after the one sample revealed a good microstructure, we had to take 6 more from different spots in the batch. Overkill since we hadn't had a problem in over twenty years with this supplier. We used to call our QC guy the Dentist, because going to him was like pulling teeth.
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Old 04-11-05, 10:03 PM   #16
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Ooo FDA, you guys get all the funky edible lubes.
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Old 04-12-05, 04:15 AM   #17
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I should take notes
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Old 04-12-05, 06:06 AM   #18
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Ooo FDA, you guys get all the funky edible lubes.
No, that would have been our consumer products division, this was in the professional division (too bad).

But, in college I did have a friend whose father was a scientist with a condom company in Dothan, AL. Now that would have been a good internship opportunity.
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