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steel
Steel is an alloy of iron and other elements, primarily carbon, that is widely used in construction and other applications because of its high tensile strength and low cost. Steel's base metal is iron, which is able to take on two crystalline forms (allotropic forms), body centered cubic (BCC) and face centered cubic (FCC), depending on its temperature. It is the interaction of those allotropes with the alloying elements, primarily carbon, that gives steel and cast iron their range of unique properties. In the body-centred cubic arrangement, there is an iron atom in the centre of each cube, and in the face-centred cubic, there is one at the center of each of the six faces of the cube. Carbon, other elements, and inclusions within iron act as hardening agents that prevent the movement of dislocations that otherwise occur in the crystal lattices of iron atoms.
The carbon in typical steel alloys may contribute up to 2.1% of its weight. Varying the amount of alloying elements, their presence in the steel either as solute elements, or as precipitated phases, retards the movement of those dislocations that make iron comparatively ductile and weak, and thus controls its qualities such as the hardness, ductility, and tensile strength of the resulting steel. Steel's strength compared to pure iron is only possible at the expense of iron's ductility, of which iron has an excess.
Steel was produced in bloomery furnaces for thousands of years, but its extensive use began after more efficient production methods were devised in the 17th century, with the production of blister steel and then crucible steel. With the invention of the Bessemer process in the mid-19th century, a new era of mass-produced steel began. This was followed by Siemens-Martin process and then Gilchrist-Thomas process that refined the quality of steel. With their introductions, mild steel replaced wrought iron.
Further refinements in the process, such as basic oxygen steelmaking (BOS), largely replaced earlier methods by further lowering the cost of production and increasing the quality of the product. Today, steel is one of the most common materials in the world, with more than 1.3 billion tons produced annually. It is a major component in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons. Modern steel is generally identified by various grades defined by assorted standards organizations.
AR500 steel plates. Selling complete set. Front and back 10x12, and both side plates 6x6. All plates are steel curved plates with the coating. Rates III+
Plates where purchased 6/1/2018 and have a 20 year life. I paid $500 after shipping. Selling for $250 in person only
ARMOR THREAT...
Fair condition 20 round magazine for M1A. All steel, fully functional, moderate wear on the finish. No brand name or any other markings.
I would trade for Ruger 10/22 mags
This knife was never used and only dropped once. At which point it put a gash in my leg ! This is a made in the USA CARBON V. This knife was hand polished and had cutlery protectant applied while stored. It was stropped but not sharpened. Still very sharp and put my Randall model 14 to shame...
Right before July 1st I acquired a CETME and a bunch of mags in a trade. I considered keeping them all, but I'd prefer to have some cash to offset some of the costs of other recent acquisitions.
These are Spanish surplus 20 round steel CETME magazines. They appear to be in good working...
About a year old. Lightly used. Its opened up the belly of 2 or 3 brookies and that's it.
It has BOS 5160 carbon steel blade.
Has a little patina forming on rear bolster, but other than that its flawless. No nicks or dings.
$40
For sale is a Security Six in Stainless with 6” barrel. Serial number puts the date of manufacture in 1985. I am the second owner of this revolver and it is in great condition. Lock-up is tight and it is accurate. Comes with an additional set of Pachmayr grips. Asking $500.
Up for sale Cold Steel Rawles Voyager, partially serrated blade. OD Green, 5.5" long blade, tanto point. This was a limited run of Voyagers, so more a collector's item, but it is basically your regular XL voyager. Full disclosure: I have it for like a year and a half. I carried it a lot, but it...
Hello Everyone,
I am selling my less than a year old Ruger Mark IV Target pistol. I bought it new last September and put about 100 rounds through it. It shoots fantastic and it feels great in the hand, quality piece. This is the stainless steel model with a bull barrel and adjustable rear...
07/21/19 - It appears to be available again
07/01/19 - Pending sale
Here's something you won't see around very much as they haven't made them in quite a while. Never used, sharpened, etc. - as new condition. Asking $50.00. They generally go for a lot more when/if you can find them.
I have a question for the community. What is it about steel case ammo that is so bad for your weapons? I'm fairly new to reloading and when I look at the components, it seems to me that if you compare say Wolf .223 Gold (brass casing) to Wolf .223 steel case the only notable difference is the...
Recently moved to a new area and I am just now looking into membership at the nearest outdoor/Indoor range which is about 50 miles away. I will attend an orientation and get a membership as soon as I can. In addition to recreational shooting I would like to try one or more of the competitions...
Comes with original case and manual. Has 2.2" barrel, 9m/m caliber Serial # 18-081xx.
Like new condition. Fired 10 times.
Can meet at Canby Rod & Gun Club for transfer, or will ship FFL to FFL.
Asking $285.00 + $20.00 shipping. Buyer to pay transfer fee.
A friend purchased this but...
07/21/19 - Price lowered again - $30.00
06/26/19 - Okay, here's a deal... $35.00
Here's something you don't see every day, especially since they don't make them anymore. You know you need one, right? :D
It's in brand new condition what with never having been used on the battlefield against...
As the title states
New, but I bought it as an "open box"
It doesn't look like it's ever been used.
I'm selling it because what showed up is not what they stated in the ad, then they never replied when I tried to return it.
Yours for $35
Hey, all, I haven't seen an online presence for the speed steel shoots at ARPC, so I'm going to start putting stuff up here, unless someone tells me there's already something I just haven't found yet.
First off, thanks to ARPC and the discipline director for making it happen, these shoots...
I have two 40rnd mint steel mags in 7.62. Pretty sure they are Romy. Asking $90 shipped for both. PayPal gift or add 3%. Will have pics up later tonight. Both Have a few stamps on each mags. Never used, just scratches from storage.