DIY chest plate MKIII

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Precision
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DIY chest plate MKIII

Postby Precision » Tue Jun 26, 2012 6:10 pm

we just got some much better steel for MKIII version.

I am so excited. My local sheet metal vendor had 304 stainless and 316L stainless at roughly 40% less than I could get it online (in small quantities) without even factoring in shipping costs.

a 10"x12" sheet was $10 for the 304 and $20 for the 316L at 14 ga (.0747"). I haven't put it on the micrometer, but I think the stuff I got is much more like 12ga (.1046)

We are going to do the sandwich idea again. The 316L will be in the middle and the 304 will be the final stopper.

More testing photo's in a couple of weeks.

The new design is roughly 1.5 inches thick or about an inch thinner than MKII.

Does anyone know the true brinell for these two steels.
I am finding 304 listed as anywhere between 115 and 175
with 316L listed as anywhere from 170 to 265.
Those are some pretty big spreads and I don't see any mention of partial hardening like 301 stainless has. 301 stainless (or similar in high carbon) is what we really wanted but not paying the price ($100 per square foot) for full hardened 301.
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Re: DIY chest plate MKIII

Postby Aglifter » Tue Jun 26, 2012 6:33 pm

Stainless varies tremendously in quality - if its ChiCom, who knows what you actually are getting...
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Re: DIY chest plate MKIII

Postby Precision » Tue Jun 26, 2012 6:54 pm

Aglifter wrote:Stainless varies tremendously in quality - if its ChiCom, who knows what you actually are getting...


There is that. I don't know where this is sourced from.
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Re: DIY chest plate MKIII

Postby Combat Controller » Tue Aug 14, 2012 11:28 am

I bet this will fit in a vest though....

Still, if you can do it for $20 then you are really on to something! I can't wait to hear more. I wish I had the time to play around with stuff these days...
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Re: DIY chest plate MKIII

Postby Precision » Wed Aug 15, 2012 2:31 am

CombatController wrote:I bet this will fit in a vest though....

Still, if you can do it for $20 then you are really on to something! I can't wait to hear more. I wish I had the time to play around with stuff these days...



We are currently defeating 7.62 x54 steel core without needing an additional spall liner although we are now where near 5#. At a cost of about $30 for non-scrounged items
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Re: DIY chest plate MKIII

Postby Steamforger » Fri Feb 13, 2015 3:09 am

Necro'ing for the purposes of leaving this here.

TL;DR/DW- matrix of thin sheet steel, fibreglass, and marbles held with epoxy defeats multiple shots from AK 47.

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Re: DIY chest plate MKIII

Postby Precision » Fri Feb 13, 2015 4:52 am

Just goes to show, they can ban "armor" but any fool with a little bit of knowledge can kludge together functional armor from household products.

My design is way more durable then that stuff, but that would take minutes (minus set time) to make.

the only real issue would be the weight penalty vs commercial armor.
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Yogimus
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Re: DIY chest plate MKIII

Postby Yogimus » Fri Feb 13, 2015 9:00 am

One I have seen work well was a 3 layer "BB" with the balls neatly arranged, with a backer and a steel front

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Re: DIY chest plate MKIII

Postby randy » Fri Feb 13, 2015 2:37 pm

Yogimus wrote:One I have seen work well was a 3 layer "BB" with the balls neatly arranged, with a backer and a steel front


Add a sheet of C4 to the backer and you have a emergency/kamikaze claymore ready to go! :mrgreen:
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Re: DIY chest plate MKIII

Postby Lokidude » Sun Feb 15, 2015 7:46 am

Precision wrote:
Aglifter wrote:Stainless varies tremendously in quality - if its ChiCom, who knows what you actually are getting...


There is that. I don't know where this is sourced from.


Almost guarantee it's Japanese. At least as of 5 years ago, almost all stainless, excepting the real specialty and niche stuff, came from Japan.
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Re: DIY chest plate MKIII

Postby HTRN » Sun Feb 15, 2015 11:21 pm

I thought Carpenter was the 800 lb gorilla among stainless manufacturers?

And Oh, Target Man is selling raw AR500 plates for 50-70 bucks. A coating of bedliner does nicely for a spall liner.
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Re: DIY chest plate MKIII

Postby Combat Controller » Sat Feb 21, 2015 6:02 pm

HTRN wrote:I thought Carpenter was the 800 lb gorilla among stainless manufacturers?

And Oh, Target Man is selling raw AR500 plates for 50-70 bucks. A coating of bedliner does nicely for a spall liner.


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Re: DIY chest plate MKIII

Postby toad » Sun Feb 22, 2015 7:37 am

I'm thinking about the Chinese laminated paper armor fore and aft breast plates. It was paper then lacquer then paper over a mold. It was water proof and actually stronger than the available metal armor of the time.
Perhaps shim stock instead of sheet metal could be used in a somewhat similar manner for chest plates??

http://www.midwayusa.com/Product/119479/cherry-red-surface-hardening-compound-1-lb

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Re: DIY chest plate MKIII

Postby Netpackrat » Sun Feb 22, 2015 8:09 am

Toad, all that stuff does is create a very thin layer of surface hardness... aka case hardening. That's not going to do you any good for armor.
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Re: DIY chest plate MKIII

Postby Yogimus » Sun Feb 22, 2015 9:50 am

lacquered layers are pretty good if you add in a few solid sheets.


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