Boardsort.com

Your complete E-scrap resource website. LEARN - SELL - PROFIT
It is currently Thu Dec 14, 2017 12:42 pm


Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: Stainless steel?
PostPosted: Sat Jan 23, 2016 1:08 am 

Joined: Fri Jul 17, 2015 9:07 pm
Posts: 66
I remember reading somewhere not sure if on this forum that that seperate shielded boards with a coaxial port coming out of it is stainless steel?

If it is how much of a price difference is it from your standard steel pile?


Top
 Profile  
 
 Post subject: Re: Stainless steel?
PostPosted: Sat Jan 23, 2016 1:12 am 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 3586
Location: Low DOS
Stainless 300 (non-magnetic) series is 18-45 cents today
Stainless 400 series runs 5-25 cents
And mu and type 5 and type 8 are all about 60c-$1


Top
 Profile  
 
 Post subject: Re: Stainless steel?
PostPosted: Sat Jan 23, 2016 1:40 am 

Joined: Fri Jul 17, 2015 9:07 pm
Posts: 66
no idea what type 5 & 8 are

How else can you find out if the stainless 400 is indeed stainless and not common steel.


Top
 Profile  
 
 Post subject: Re: Stainless steel?
PostPosted: Sat Jan 23, 2016 2:08 am 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 3586
Location: Low DOS
Type 5 and Type 8 are actually Nickel with carbon steel and other proprietary materials.
I'm pulling on memory here; but I believe 5 are US patented and 8 are international (protected) standard alloys.
Of the 8s are:
https://en.wikipedia.org/wiki/Mu-metal
https://en.wikipedia.org/wiki/Permalloy (Back of MOST hard drive magnets)
https://en.wikipedia.org/wiki/Supermalloy

In the 5s are
https://en.wikipedia.org/wiki/Nickel_titanium (Nitinol)
https://en.wikipedia.org/wiki/Hiduminium
https://en.wikipedia.org/wiki/Chromel
https://en.wikipedia.org/wiki/Nichrome
https://en.wikipedia.org/wiki/Bismanol
https://en.wikipedia.org/wiki/Heusler_alloy


A good place for info:
https://en.wikipedia.org/wiki/Category:Nickel_alloys


Stainless, from a recycling standpoint has nothing to do with "Steel" (unless it's specifically mentioned as Stainless Steel, or Stainless Steel #3xx or #4xx).

Stainless alloys are actually dependant on NICKEL content. The generic term Stainless refers to Nickel, such as stainless chrome for car bumpers or stainless faux gold flatware (most often bell metal, steel, copper, chrome, nickel, and zinc).

Another thing I need to do... get permission from the scribd user to repost the internal (aka private) link to the DOD guide I've used, and passed out to owners/employees at the yards I've used. Really mind blowing how much is out there as far as categories of recycling.

I over sort to begin with (how many people sort the classes of "cast" aluminium eg die cast vs ceramic plaster vs cold vs ... for the few cents to a disme of difference.) But looking at what the DOD does... they list over 20 different stainless categories and over 50 "stainless steel"s as well.


Top
 Profile  
 
 Post subject: Re: Stainless steel?
PostPosted: Sat Jan 23, 2016 2:18 am 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 3586
Location: Low DOS
lucas01230 wrote:
How else can you find out if the stainless 400 is indeed stainless and not common steel.

Starting out; you'll need to get them scanned. In time (and I do honestly mean eventually) you'll learn to recognise stainless steel and other stainless classes by sight clues.
How it reflects light, colours that are refracted, etc.
Some use various grinding wheels (many high volume fast paced yards do as well) and have memorized various spark types from them. The colour of the sparks, the shape, etc. For me, I've just gotten to the point where i've gotten familiar enough with the majority of what I deal with to know 90 some ought percent of the time.
Unless I have a massive (hundreds of pounds) volume of the same thing, I use two methods together personally for anything I doubt off hand.
First: I deeply gouge and file a clean spot dead centre of the piece. If it's still the same finish as the surface (matt vs gloss vs reflective etc) I move on to the next step. If not, into the clean sheet steel pile it goes. Not worth continuing.
Second: compare the colour reflections and refractions under fluorescent tube bulbs vrs LED bulbs of the clean surface and the filed area. And make a determination based on the differences.
When in /real/ doubt, into the clean sheet pile it goes.


Top
 Profile  
 
 Post subject: Re: Stainless steel?
PostPosted: Sat Jan 23, 2016 2:27 am 

Joined: Fri Jul 17, 2015 9:07 pm
Posts: 66
I am so glad you brought up cast aluminum. Ive got a pile and i would love to sort. I got stuff from snowblower engines to those sattelite LNBs. Also im learning that it could be zinc(or some other metal im forgetting) and the like.

Any tips with that?

Also i saw i think it was your post but ive only been to a scrapyard a handful of times because i hoard until i get good prices (except with steel thats just ridiculous to hoard imo). Ive been going to American scrap metal in alsip and after you told me about that other place down 95th ( or was it 87th) ive really reconsidered how well they price and sort their stuff there. I even went as far as contacting a place near Kenosha (family got lakehouse out there).


Top
 Profile  
 
 Post subject: Re: Stainless steel?
PostPosted: Sat Jan 23, 2016 2:46 am 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 3586
Location: Low DOS
The best I can do for aluminium is snap photos and update a thread as I get it. Grading out cast methods isn't really worth it unless you have over a hundred pounds. Taking my privileged rate you're unfortunately not likely to pull most places die cast is 28c clean vs cold cast at 31c
Yes you need to be careful. Many of those "aluminium " pieces can be zinc, magnesium, manganese, or some al/mg alloy.
Engines will usually have iron in them and get classed in aluminium breakage or "old" al.

Editing: most satellite blocks arr magnesium or less often zinc.


Top
 Profile  
 
 Post subject: Re: Stainless steel?
PostPosted: Sat Jan 23, 2016 2:47 am 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 3586
Location: Low DOS
Yard is ABCO metals on 94th. Corner of 95th and Genoa behind the dpt of water.


Top
 Profile  
 
 Post subject: Re: Stainless steel?
PostPosted: Sat Jan 23, 2016 2:53 am 

Joined: Fri Jul 17, 2015 9:07 pm
Posts: 66
Oh man i took my time with those engines i broke them down to the tiniest hex screws. I found a really strong magnet from a water pump. And yeah magnesium that was it.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 5 hours [ DST ]


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to: