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micrograin material which has an average grain size of .8 microns. Depending on the application, some endmills may be manufactured with a grain size of .5 microns. Most of the saws that i have seen have had a grain size of 2-5 microns. Saws are generally made from a 6% Co mixture, while endmills are generally made from a 10% cobalt mixture (ie 10%Co, 90%WC). Other elements (refractory carbides) may be added to control grain growth during sintering (Cr3C2,TiC, TaC, etc), but this is usually kept at 5% of the binder (Co) content for endmills...any higher and you run the risk of compromising the
Transverse Rupture Strength. R. Duffield
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AlTiN, DLC etc., and you can get real fancy with the proprietary blends and colors; but the important thing here is that these coatings are there to improve chip evacuation with a lower coefficient of friction than the tool material itself, increase temperature resistance (with faster chip evacuation and creating a barrier between workpiece and the tool), and decrease the amount of wear the tool takes. It would be more economical to just use the existing coating systems than to take what is one of the densest metals in the world and powder it to below 1 micron to try to deposit a thin film of it over a steel drill tip.
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607:; I removed it, since trivia sections suck. (Except maybe for articles on episodes of television shows, where nobody cares. :-) What is worth adding to the article is that tungsten carbide has been/is used as a neutron reflector, but I have no idea how to put in any more than "tungsten carbide has been used as a neutron reflector", which is a bit lacking. If anyone has more details (besides the lame "there once was a criticality accident involving tungsten carbide"), do add.
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The problem is that would require some published source to say the use had become common... which just isn't... commonly done. Usually there will be publishing when it becomes possible... then maybe when it is practical... then sometimes it will be mentioned more often but that won't let us say "and
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In short: not all cutting tools are solid carbide, not all cutting tools are coated, and not all solid carbide cutting tools are coated. And as I understand, machine tools refer to the equipment that actually makes use of the carbide cutting tools (for example, the lathe for your triangular insert is
1073:
I am honestly unclear whether machine tools are solid carbide or just a coating, perhaps the article should clarify. If I have a small triangular "carbide insert" for a turning tool, is that a solid hunk of tungsten carbide-cobalt composite? If I have a "carbide" endmill, is the whole thing including
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Yes that is true, silicon carbide is somewhat harder than tungsten carbide, silicon carbide has about 2400 compare to tungsten carbide of 1800 in Knoop hardness, so as to exclude the possibility of cutting. But in addition to diamond cutting or "shaping" tungsten carbide, it is done with cubic boron
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The powder associated with manufacture and grinding carbide is toxic, causing heavy metal poisoning. Once the piece has completed all grinding and polishing it is safe. Tool grade tungsten carbide uses Cobalt to bind the tungsten grains together. Since cobalt is toxic, nickle is used as a binder in
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Jewelry pieces made primarily of tungsten carbide (and other binding metals) have been available for a while now, but the links to the material safety data on this page suggest that tungsten carbide may be toxic through skin contact. Am I misinterpreting something, or do these hazard warnings apply
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which seems to suggest that it can be produced by high temperature reaction of tungsten oxides with a carbon dioxide/monoxide mixture. This one in particular mentions the inclusion of hydrogen in the gas mixture, but several other patents do not. I'm not sure of the exact industrial method that is
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Various sources on the internet show that SC is equal to or harder than WC.... but I'm rubbing a piece or SC emmery cloth from
Germany on a polished WC part right now and its not putting a single scratch on it. I've also tried cutting WC with a few differnt brands of SC lapping paste and it doesn't
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Tungsten carbide armour piercing rounds were invented and used long before the Second World War. Some pre-war weapons only used tungsten carbide AP rounds, such as the French mle 37 APX gun of 1937. This weapon was considered a military secret, as its performance so far exceeded the 1930s average.
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Yes, it is. It seems very weird that a ionic compound would have an organic prefix, but the same occures with
Manganese (IV) Oxide, it is more commonly known as manganese dioxide. Assume that ditungsten carbide refers to the lower oxidation state, tungsten 2+ and mono refers to the higher oxidation
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Since the size of the particles has already been answered, I'll just elaborate and say that for high precision technologies, sizes below 0.2 microns is not uncommon. And don't be fooled by the reflective appearance of the tools - in the industry that is just called a "bright" surface finish and it
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Those patents are currently being fought over in court and are highly questionable. There is prior art and it was an obvious concept... Trew
Tungsten has not won a single case, although several have been settled for very small sums. Further, I don't see why they should be cited because they may or
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Use of tungsten carbide rounds by 37mm cannon on Stukas is a somewhat redundant use since standard AP rounds would also be effective against the top profile of all vehicles, armoured or soft. Similarly an ace close support pilot would be able to achieve better result with the less effective round,
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Tungsten carbide was a brittle material but that was compared to steel. Much of the armor piercing work was done by Dr. Irwin Rudy of
Pacific Hardmetals in Forest Grove, OR. Use of Nickel instead of Cobalt made a much tougher part. Also the way the force is directed has a tremendous effect.
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Tungsten carbide is very brittle. It is a dense material, with density around 15 g/cc, but not nearly as dense as tungsten or depleted uranium, which are in the 18-19 g/cc range. Pure tungsten and the "heavy metal" compositions of cemented tungsten bound with sintered nickelbronze are still very
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I do not know of any tools with "just a coating of tungsten carbide on top". Knowing how these tools are made, I can't imagine a cost-effective way to deposit tungsten carbide onto HSS (the alternative to carbide). Your standard coatings for carbide tools are things like TiN, TiCN, TiAlN, AlCrN,
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Most of your endmills are C2 solid carbide. Saws can be either solid carbide, or be of steel with carbide 'tips' inserted on each cutting surface. Some endmills are coated with TiN (that gives them a golden yellow color), which will decrease tool wear. Your higher quality endmills are made of
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The choice
Germany faced in the late-war period was to use its available tungsten carbide for machine tools used in weapon production, or to fire it off as armour-piercing rounds. They chose the former course, and tungsten carbide rounds, called "AP40" or "Arrowhead" in some German usage, became
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should be made much more clear in this article. As far as I am aware, monolithic tungsten carbide is almost never used to make anything, only cemented carbide is used. The applications section of the article does not seem to make this distinction clear enough, with the Sports usage and
Surgical
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I'd advise not adding the cost. Tungsten itself might tend to be a bit more stable than other commodities in the medium-term but actually the cost tungsten carbide is highly dependent on cobalt. Cobalt has always been an erratic commodity due to its limited sourcing, and with the advent of
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The "In fiction" section adds nothing to our knowledge of tungsten carbide; if they are of interest to anyone at all, it would be Monty Python fans or Halo fans, not tungsten carbide users. Tungsten carbide is probably mentioned thousands of times in fiction of various sorts, why would an
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I work at a place that makes Pump Seals for the nuclear industry - We polish many different materials using many different abbrasives. I can tell you for sure that SILICON CARBIDE WILL NOT CUT TUNGSTEN CARBIDE. SC lapping paste and SC 'sand'paper will not scratch our WC parts.
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After reading the page about tungsten carbide guitar slides I'm questioning if this an important use of this material. The main advantage seems to be their hardness which prevents them from beeing scratched by the steel wound guitar strings. Why is this significant?
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If you have a small triangular carbide insert, you probably have some manufacturer's proprietary mix of tungsten, carbon, cobalt and their special spices (in less than 1% amounts) which has been pressed together in a mold, sintered, ground if required, and coated if
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the shank one big piece of tungsten carbide-cobalt composite? What about a "carbide" saw blade? Are any of these tools made with just a coating of tungsten carbide-cobalt on top of some other material? Or are they available in either coated or solid versions?
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Found a toxicological profile for tungsten made by the U.S. Department of health and human services (august 2005). It talks mainly about the use of tungsten carbide for machining but it also talks about ammunition on pages 22 and 31 I found it here:
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In the structural drawing of WC or tungsten carbide, it looks to me as if there are five bonds from each carbon (gray atoms in drawing), which stands at odds with all of my learning that carbon has a total of four bonds per atom. What gives?
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right, all i wana do is find out if i were to commission a tungsten carbide knife, would it cut the mustard. i was informed that it's "hardness" would be around 81 HRA. as you can tell, i'm not too aux fait with this malarky. any help?
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can be achieved on large grains just as easily and is no indication of the grain size. The only way to truly tell is to take samples under a microscope, and destructive material tests for a more thorough analysis.
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If they're sold as "solid carbide", the cutting tools used in machine tools are almost entirely made of tungsten carbide. Coating is an option you can have to prolong tool life, increase material removal rate
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This section in particular sounds awkward due to the addition of the last paragraph which intentionally conflicts with other information. This info needs to be integrated, and preferably be properly sourced.
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Also, how big are the particles of WC in the composite? I would think they must be really small, because carbide tools are sometimes fairly reflective, and big grains would give a more matte appearance.
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AP rounds cab be capped for ballistic purposes, and also to enhance the penetration of tungsten carbide cores, by prevention of shattering. Hence "APCBC" for armour piercing capped ballistic capped".
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Portugal was one of Nazi
Germany's few neutral and accessible source of tungsten ore, and even today the national bank is reputed to have in its vaults a few gold bars stamped with the swastika.
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hard, but more malleable and ductile and less prone to shattering on impact with armor. As far as I am aware, "heavy metal" is in common use today in AP projectiles, but tungsten carbide is not.
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We have two interstitial compounds known colloquially as tungsten carbide- but only one article with one chembox. It would be better if this article was split into two separate ones (for WC and W
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627:, / Corrosion Induced by Low-energy Radionuclides: Modeling of Tritium and Its Radiolytic and Decay Products Formed in Nuclear Installations By Gilbert Bellanger Published by Elsevier, 2005
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Not to long ago i watched a video on youtube about the .50 BMG, one of the marines in the video refered to the M-2(?) armor peircing round as having a tungsten carbide core. just a thought.
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If you have a carbide end mill (and it's not a "brazed carbide end mill") the whole thing including the shank one big tungsten carbide rod that's been formed to your specification.
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I do not see the legitimacy of this website. They do not update their information and there are no pictures or proof a validity. Not to mention much of the text is duplicated
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encyclopedia mention any of them? How does one decide which fictional mentions are encyclopedic and which aren't? I think this section should be deleted, any other opinions?
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Could some informed person improve the historical part of this article so as to indicate the approximate dates when some of the uses discussed became common? Thanks.
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1760:(160 - 200 nΩ⋅m , depending on binder content; units on that site are in μΩ⋅cm). In the text of the article I see a figure of 200 nΩ⋅m, which is a bit weird).
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1217:. I think people are likely to be confused about this, as I am/was. Furthermore, the picture in the infobox is of (I think...) cemented carbide, not TC.
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The reference is to the Kittel (7th edition) Wiley -India edition- the isbn is correct (isbn-10 81-265-1045-5) - unless there is a misprint in my copy!
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That section was added here some 3 years ago, while the above page says "addtime:2010-10-13 15:21:58", thus I believe they've copied WP text.
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Hi, is the ISBN for reference 10 really correct. The reference is
Introduction to Solid State Physics by Charles Kittel (7th ed)
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In other languages tungsten-carbide is called 'vidia' from German expression "vie diamant" (like diamond) - Valdez from
Hungary
1688:, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
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Think of how many students would be spared the subliminal urge to go to the toilet during metallurgy or manufacturing courses.
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I’m not sure a tornado ever forced straw through a board but I do have picture or piece of plywood forced through a tree.
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At any rate, I don't have time to argue or change it myself, so you guys can discuss it and change it when you have time.
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SEE for example: Under the Cloud: The Decades of Nuclear Testing By Richard Lee Miller Published by Two-Sixty Press, 1986
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The article seems to be stating that bulk tungsten carbide has been used to fashion AP rounds, but I wonder about this.
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I made a boo-boo on the references, and i don't know how to fix it i was trying to get the jewelry citation to go to
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to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
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This material is not composed of carbon rings and carbon acts much like a metal in alloys in it. djb
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I removed the copyrighted material and warned the user with {{subst:nothanks|Tungsten carbide}}. —
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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before doing mass systematic removals. This message is updated dynamically through the template
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http://www.matweb.com/search/DataSheet.aspx?MatGUID=e68b647b86104478a32012cbbd5ad3ea&ckck=1
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smartphones and now EVs, there is no way we can keep the price on this wiki remotely accurate.
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the machine tool, but the insert is the cutting tool). But to address the other questions:
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may not hold a valid patent in one country for one use of one kind of this entire metal.
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should be cited for the tungsten carbide ring source for he has several patents on it.
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1607:, "External links modified" talk page sections are no longer generated or monitored by
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If you found an error with any archives or the URLs themselves, you can fix them with
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http://www.carbideprocessors.com/pages/carbide-parts/tungsten-carbide-properties.html
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What is electric resistivity of Tungsten carbide? I have seen various figures from
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Last edited at 01:19, 3 July 2009 (UTC). Substituted at 09:21, 30 April 2016 (UTC)
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http://www.sapub.org/global/showpaperpdf.aspx?doi=10.5923/j.cmaterials.20120203.04
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seems to have grabbed information directly from hardmaterials.sandvik.com (like
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so this may be worth explaining. I expected to find some words on this in the
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is understood in way too many countries to mean water closet (i.e. restroom,
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And could not find the listed ISBN. Please check if this needs correction.
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at high temperatures. I can't yet find a reference for exactly how high.
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Also, "TC" is not a good name either, since T is not a chemical symbol (
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I found this ISBN for it: ISBN-10: 0471111813 ISBN-13: 978-0471111818
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http://www.mustadhoofnails.com/subcat/40/product/1369/page/0/road_nail/
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http://www.tungstenchina.com/product/Tungsten-Carbide-Products-763.html
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http://www.wesltd.com/divisions/hardmetal/html/Tungsten-carbide.html
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Carbide is extremely strong in compression but weak in tension.
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because it talks about the cobalt in Tungsten carbide jewelry.
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show some alloys with Cu, but I couldn't decipher units used.
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The bulk of information regarding the Applications comes from
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https://www.generalcarbide.com/assets/pdf/GCDesignerGuide.pdf
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When you have finished reviewing my changes, please set the
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http://www.forevermetals.com/jewelry-tungsten-carbide-ring/
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and of course they didn't restrict their attacks to T-34s.
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for additional information. I made the following changes:
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There was a "trivia" section here mentioning the death of
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redirects here without explanation. In other languages,
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http://www.goodfellow.com/E/Tungsten-Carbide-Cobalt.html
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C) with a disambiguation page for tungsten carbide. --
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Knowledge level-5 vital articles in Physical sciences
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cut the WC parts either. Only diamond works for us.
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Silicon Carbide is NOT harder than Tungsten Carbide.
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415:, a collaborative effort to improve the coverage of
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237:, a collaborative effort to improve the coverage of
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This is a core article in the WikiProject Chemicals
1772:says it is similar to tool steel and carbon steel.
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https://www.azom.com/properties.aspx?ArticleID=1203
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Electric resistivity and speed of sound in the box?
1617:using the archive tool instructions below. Editors
1201:The article doesn't make much distinction between
733:, so someone should take a further look at that.
582:The method most commonly used in the industry is
1519:http://www.metal-pages.com/metalprices/tungsten/
110:, which aims to improve Knowledge's coverage of
1684:, and are posted here for posterity. Following
1453:How can it be inorganic if it has carbon in it?
1814:section, but there is nothing. What to write?
1603:This message was posted before February 2018.
818:http://www.atsdr.cdc.gov/toxprofiles/tp186.pdf
1848:Knowledge vital articles in Physical sciences
1780:page 16 says 200 nΩ⋅m. It is very confusing.
1732:it became common by x date". Just generally.
1678:The comment(s) below were originally left at
690:Is this "Ditungsten Carbide" business legit?
569:http://www.freepatentsonline.com/7108831.html
8:
1231:It seems to me that the distinction between
1923:Knowledge articles that use British English
1863:B-Class vital articles in Physical sciences
1209:. Much of the uses section on;y relates to
1170:WC structure drawing has five carbon bonds?
1557:I have just modified one external link on
1396:, "John", can, crapper) and since CW as "
1069:Are machine tools solid carbide or coated?
686:71.113.22.200's "Ditungsten Carbide" edits
493:, which has its own spelling conventions (
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1768:shows other values too (530 - 800 nΩ⋅m).
1517:Currently $ 42/kg for 3-4 micron powder,
561:Why isn't this explained better then ????
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1213:but is presented as though it is about
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1457:Isn't that the definition of organic?
938:tungsten carbide jewelry. R. Duffield
1903:High-importance Metalworking articles
1592:to let others know (documentation at
1154:No, but it may be nonstoichiometric.
934:only to the substance when powdered?
874:increasingly rare from 1943 onwards.
525:, this should not be changed without
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409:This article is within the scope of
320:This article is within the scope of
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96:This article is within the scope of
1888:Mid-importance Engineering articles
1782:2A02:168:F609:0:C38D:4039:F7BF:4885
1255:Hardness Error in Opening Paragraph
49:It is of interest to the following
1913:High-importance Materials articles
1873:High-importance chemicals articles
1418:is called Wolfram in chem-speak).
1240:instruments ignoring it entirely.
540:How do you make Tungsten Carbide?
340:Knowledge:WikiProject Metalworking
14:
1686:several discussions in past years
1561:. Please take a moment to review
343:Template:WikiProject Metalworking
251:Knowledge:WikiProject Engineering
1893:WikiProject Engineering articles
1878:B-Class WPChem worklist articles
1843:Knowledge level-5 vital articles
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1681:Talk:Tungsten carbide/Comments
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423:and see a list of open tasks.
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245:and see a list of open tasks.
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1309:Reference 10, ISBN not found
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999:http://www.trewtungsten.com/
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1438:Given that it's the actual
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942:one article - two compounds
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1554:Hello fellow Wikipedians,
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725:Armor-piercing ammunition?
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36:level-5 vital article
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257:Engineering articles
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521:. According to the
1674:Assessment comment
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536:Preparation
488:written in
248:Engineering
239:engineering
195:Engineering
1832:Categories
1459:ScienceApe
1392:, toilet,
1364:Axiosaurus
1342:wp:sofixit
1056:Jmeden2000
952:Axiosaurus
700:state 4+.
632:0080445101
625:0029216206
554:Physchim62
1649:this tool
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1537:Ermendrud
1522:Majermike
1219:Efcmagnew
1197:cunfusing
1121:Ermendrud
929:Toxicity?
658:this page
584:sintering
499:travelled
426:Materials
417:Materials
389:Materials
123:Chemicals
113:chemicals
70:Chemicals
39:is rated
1697:Regards
1655:Cheers.—
1475:unsigned
1416:Tungsten
1390:washroom
1323:unsigned
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717:Sparohok
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171:worklist
1795:Borium?
1734:Shajure
1712:History
1665::Online
1582:checked
1563:my edit
1346:Shajure
1141:Dojarca
1009:Greg995
968:jewelry
798:Tomwalz
779:Kyanite
702:Kyanite
662:Splarka
515:analyse
507:defence
458:on the
364:on the
275:on the
150:on the
41:B-class
1812:Naming
1804:borium
1800:Borium
1590:failed
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591:Veddan
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550:carbon
503:centre
495:colour
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1808:boron
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