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Post by Tom K. (ianflaer) on Jul 4, 2010 1:48:08 GMT
I'm well aware of what is on that page, I'm not saying he is definitely wrong but I am saying that there is more to the story then just that and considering the source of the steel is China there is a lot more room for inaccuracies. the whole high speed tool steel thing has been hyped by sellers and the general public does not have a straight answer as to what T10 really is.
now I own and have handled a few T10 swords and I have been happy with all of them and T10 shows hamon really well, so whatever is in it I like it.
I'm not terribly concerned with what is really in it any more, I kind of view T10 as being similar to Hanwei's new "secret steel". we know it's good but we don't know what it really is. in all honesty that's all we really need to know, but in the interest of honesty I figured I'd mention the fact that there is some accademic doubt surounding the steel. heck, if you buy any steel from a chinese foundry it is likely to vary from the AISI standard for it no matter what kind of steel it is, but I digress.
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Post by Deleted on Sept 27, 2010 2:42:14 GMT
If you google "t10 steel," there is an article with the title: "Effects of power ultrasonic treatment on microstructure and mechanical properties of T10 steel." by Qingmei Liu, Qijie Zhaia, Feipeng Qia and Yong Zhang of the School of Materials Science and Engineering, Shanghai University. You cannot get the dissetation without paying $31. However, without clicking the entry, google summary has this to say: It is not 1095 steel because of the .2% silicon listed. But it is not Western W-1 steel either. The carbon, silicon, manganese are similar, but not the other elements. Here are the composition of W-1 steel from Diehlsteel : www.diehlsteel.com/w1.aspxC-1%, Si-.02%, Mn—0.25%, Cr-.15%, Mo-.1%, W-.15%, V-.01%/ If this is true, T-10 has higher impurity than W-1 steel. T-10 has sulfur and phospherous which W-1 does not have. There are three elements missing from T-10 that W-1 has tungsten, cromium, tungsten, and vanadium. As I suspect before, T-10 is the inferior version of western tool steel. In this case, it is the cheaper version of W-1 steel. It doesn't even have tungsten. I am not sure it is even qualified as tool steel without tungsten, maybe just spring steel.
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Post by Deleted on Sept 27, 2010 3:28:00 GMT
Now, I am more confused than before. Having found what I found. I then saw this on Nihonzashi equating T-10 steel to W-1 steel. And Nihonazashi site listed tungsten as an element of T-10. This question will never die, I guess. The quest for the composition of T-10 steel is very frustrating. www.nihonzashi.com/types_of_steel.aspx#AISI_Steel_Chart
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Post by Deleted on Sept 29, 2010 18:20:42 GMT
Copied from a post on SFI today:
The article is "Micro Structure of Laser Processed T10 Carbon Tool Steel." by Xianzhang Bu of the Technology Department, Changchun Institute of Optics and Fine Mechanics.
The composition according to the article:
C = 1% Si = .32% Mn= .36 P = .031 S = .029
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Post by Tom K. (ianflaer) on Sept 29, 2010 19:07:19 GMT
Oogway, can you link to that article?
it seems like we are finally getting a good definition of what T10 steel really is. I notice there is no tungston in it. therefor it is definitely not in the same family as T15 and is likely not a high impact tool steel as has been talked about.
T15 = Carbon, C 1.60 % Chromium, Cr 4.25 % Cobalt, Co 5.0 % Iron, Fe 70.55 % Manganese, Mn 0.30 % Molybdenum, Mo 0.75 % Silicon, Si 0.30 % Tungsten, W 12.25 % Vanadium, V 5.0 %
lots of stuff going on here in T15 not going on in T10, hard for me to buy they are in the same family.
so as long as the above chemestry is right for T10 I think we have finally debunked the idea that T10 is a high speed tungston tool steel (unless that list above conveniently leaves a lot of stuff out)
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Post by Deleted on Sept 29, 2010 19:24:34 GMT
I am the author of the thread in SFI that Oogway refered to. I have the "Micro Structure of Laser Processed T10 Carbon Tool Steel" article in PDF. If anyone want it; pm me and I will email it to you. I won't be able to do it until later tonight since I have it in my personal computer at home.
Anyway, the article by Xianzhang Bu did use the word "tool steel" but he (or she) did not use the term "tungsten tool steel." The terminology used in the article is "carbon tool steel." Looking at the composition, it is more likely in the same family as the 9260 silicon-manganese, which make it a Spring Steel. It has higher carbon content than 9260. If 9260 is 1060 with silicon-manganese; the T-10 is 1095 with silicon-manganese. In fact, the silicon and manganese contents are almost identical, the main different is carbon content.
In short, T-10 is not a tool steel, but a spring steel. But it is definitely not run-of-the-mill 1095 either.
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Post by Deleted on Sept 29, 2010 19:52:23 GMT
I am the author of the thread in SFI that Oogway refered to. I have the "Micro Structure of Laser Processed T10 Carbon Tool Steel" article in PDF. If anyone want it; pm me and I will email it to you. I won't be able to do it until later tonight since I have it in my personal computer at home. Anyway, the article by Xianzhang Bu did use the word "tool steel" but he (or she) did not use the term "tungsten tool steel." The terminology used in the article is "carbon tool steel." Looking at the composition, it is more likely in the same family as the 9260 silicon-manganese, which make it a Spring Steel. It has higher carbon content than 9260. If 9260 is 1060 with silicon-manganese; the T-10 is 1095 with silicon-manganese. In fact, the silicon and manganese contents are almost identical, the main different is carbon content. In short, T-10 is not a tool steel, but a spring steel. But it is definitely not run-of-the-mill 1095 either. If I may ask where did you get this article and who is the author (as in what are his/her credentials?)
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Post by Deleted on Sept 29, 2010 20:08:27 GMT
Sam, The name is Xianzhang Bu of the Technology Department, Changchun Institute of Optics and Fine Mechanics, Chinese Academy of Science. It is in the Journal of Material Science Technology. Here is the link to the abstract: www.jmst.org/EN/abstract/abstract15284.shtmlIf you look to the upper-right of the page there is a link labels: PDF(907KB). Click on it to download the PDF version. I am not sure about the credential of the author. He/she could be a doctor or just a doctoral candidate. But the paper is a legitimate academic paper.
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