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Effects of brake fluid on 304 stainless.

Started by Pip, November 04, 2011, 12:08:32 PM

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ducpainter

#15
November 05, 2011, 10:54:39 AM
Quote from: teddy037.3 on November 05, 2011, 10:53:18 AM
well, yeah... but I'd just use my seniority to tell one of the lathe guys to make it for me  [evil]


That's fine...

get it handled. :P
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Pip

#16
November 06, 2011, 07:24:02 PM
Quote from: ducpainter on November 05, 2011, 10:54:39 AM
That's fine...

get it handled. :P

Yeah, what he said! I can mail this off to ya, Teddy.  [thumbsup] ;D
"You can fight a lot of enemies and survive, but not your biology."

Wouldn't fat air be easier to disappear into?

teddy037.3

#17
November 06, 2011, 08:49:53 PM
Quote from: ducpainter on November 05, 2011, 10:54:39 AM
That's fine...

get it handled. :P

Quote from: The Zombie Pip on November 06, 2011, 07:24:02 PM
Yeah, what he said! I can mail this off to ya, Teddy.  [thumbsup] ;D

[laugh] y'all are too much sometimes

corey

#18
November 09, 2011, 01:42:25 PM
Quote from: The Zombie Pip on November 04, 2011, 01:56:44 PM
[cheeky]

Now I'll be digging into metallurgy, to keep from anymore embarrassing newb posts.  ;D

one of my clients at work is a specialty stainless manufacturer, so i've been learning a lot lately.
It's pretty interesting stuff.
When all the land lays in ruin... And burnination has forsaken the countryside... Only one guy will remain... My money's on...

Pip

#19
November 09, 2011, 07:27:00 PM
Quote from: corey on November 09, 2011, 01:42:25 PM
one of my clients at work is a specialty stainless manufacturer, so i've been learning a lot lately.
It's pretty interesting stuff.

Does he wanna do a little pro bono brake piston?  ;D [thumbsup]  [laugh]
"You can fight a lot of enemies and survive, but not your biology."

Wouldn't fat air be easier to disappear into?

teddy037.3

#20
November 10, 2011, 08:05:21 AM
since I've got my machinery handbook right... here... it sayeth:

304 has 18-20% Cr, 8-10.5% Ni, .08% C, 2% Mn, .75% Si, .045% P, .030% S .1% N
316 has 16-18% Cr, 10-14% Ni, same C, Mn, P, S, N, and adds 2-3% Mo

304: low-carbon modification of type 302 for restriction of carbide precipitation during welding.
316: higher corrosion resistance than 302 and 304; high creep strength.  *whatever that means

Speeddog

#21
November 10, 2011, 10:43:00 AM
High creep strength means that the material will not deform permanently (as easily) at high temperatures.

IE, some materials suffer drastically reduced yield strength at elevated temperatures.
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teddy037.3

#22
November 10, 2011, 11:16:00 AM
Quote from: Speeddog on November 10, 2011, 10:43:00 AM
High creep strength means that the material will not deform permanently (as easily) at high temperatures.

IE, some materials suffer drastically reduced yield strength at elevated temperatures.

cool beans

ducatiz

#23
November 10, 2011, 12:01:17 PM
Quote from: ducpainter on November 04, 2011, 01:54:38 PM
...and nickel is pretty corrosion resistant too.

maybe that's why they call it stainless? ;D

only in the US, the EU considers that claim to be false advertising so they have to call it something else, usually INOX from the french "inoxydable"..
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

ducpainter

#24
November 10, 2011, 03:44:17 PM
Quote from: ducatiz on November 10, 2011, 12:01:17 PM
only in the US, the EU considers that claim to be false advertising so they have to call it something else, usually INOX from the french "inoxydable"..
...and certain chemicals are known to cause cancer only in California.

Stainless is close enough for me counselor. :-*
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Langanobob

#25
November 11, 2011, 12:57:26 AM
Quote from: ducatiz on November 10, 2011, 12:01:17 PM
only in the US, the EU considers that claim to be false advertising so they have to call it something else, usually INOX from the french "inoxydable"..

The  legal term found on technical specifications here in the USA is "CRES" (Corrosion RESistant).

teddy037.3

#26
November 11, 2011, 06:09:05 AM
Quote from: Langanobob on November 11, 2011, 12:57:26 AM
The  legal term found on technical specifications here in the USA is "CRES" (Corrosion RESistant).


???
pretty sure CRES =/= all stainless

ducatiz

#27
November 11, 2011, 06:37:30 AM
The point was that there is stainless and then there is "stainless."

304 has a very high chromium content which is what provides the corrosion resistance, as does nickel to a lesser degree.  It's a very common alloy and it's pretty cheap to get and fair for machining. 

You can predict the onset of corrosion by how much chromium it has, but it's a tradeoff with machineability. 
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

Langanobob

#28
November 11, 2011, 09:42:52 AM
Quote from: teddy037.3 on November 11, 2011, 06:09:05 AM
???
pretty sure CRES =/= all stainless

Not sure what =/= signifies  :) but I didn't mean that CRES applies only to 304 or a specific grade of "stainless steel", it applies to all.   I guess my point was that "stainless" steel is not really stainless, only corrosion resistant. Depending on the environment it finds itself in it will nearly all corrode to some extent.

teddy037.3

#29
November 11, 2011, 11:06:00 AM
Quote from: Langanobob on November 11, 2011, 09:42:52 AM
Not sure what =/= signifies  :) but I didn't mean that CRES applies only to 304 or a specific grade of "stainless steel", it applies to all.   I guess my point was that "stainless" steel is not really stainless, only corrosion resistant. Depending on the environment it finds itself in it will nearly all corrode to some extent.

'does not equal'  :)

we were taught that CRES only applies to certain grades of stainless steels... like 302, 303 are not CRES. 304, 316 are CRES. 400 series stainless aren't CRES, either.
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