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Kevin S.





Joined: 25 Aug 2009

Posts: 54

PostPosted: Thu 10 Dec, 2009 5:22 pm    Post subject: Question About Sword Quality Article         Reply with quote

http://www.myArmoury.com/feature_bladehardness.html

I have tried contacting the person who wrote the article, but he hasn't responded.
You guys should know the answer, which is why I am asking it here.

When the author wrote things like .43 for the carbon content, did he meant .43% or 43%?


thank you very much for your help.
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Ken Nelson




Location: central Wisconsin, USA
Joined: 01 Apr 2007
Reading list: 12 books

Posts: 55

PostPosted: Thu 10 Dec, 2009 5:37 pm    Post subject:         Reply with quote

0.43%

Carbon in Steel is counted by points, 100 points of carbon = 1.00% carbon in the steel by weight

It actually takes very little carbon to make a huge difference in steel.

Also, many steels use the carbon points to define themselves, for example 1060, 1075, 1095. All three are simple steels, with only carbon, and a little manganese as the alloying elements. the last two numbers are the points of carbon, so they would be 0.6%, 0.75% and 0.95% respectively. Higher carbon meand higher hardness, but also more brittle.

Ken

"Live and learn, or you don't live long" L. Long
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Justin King
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Location: flagstaff,arizona
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PostPosted: Thu 10 Dec, 2009 5:47 pm    Post subject:         Reply with quote

Steel has a carbon content of less than 2.20% (IIRC), anything with a higher carbon content is cast iron. I am not sure but I think 47% may be a physical impossibility.
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Jared Smith




Location: Tennessee
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PostPosted: Thu 10 Dec, 2009 9:12 pm    Post subject:         Reply with quote

Justin King wrote:
I think 47% may be a physical impossibility.


I would guess that such a thing would have to be a carbon fiber composite with some metal matrix. It could make a low weight structure, but not much of a spring steel.

Absence of evidence is not necessarily evidence of absence!
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Kevin S.





Joined: 25 Aug 2009

Posts: 54

PostPosted: Thu 10 Dec, 2009 11:48 pm    Post subject:         Reply with quote

thank you very much guys, that was helpful.
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Craig Johnson
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Location: Minneapolis, MN, USA
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PostPosted: Fri 11 Dec, 2009 11:52 am    Post subject: Weird         Reply with quote

Hi Kevin

I sent the message below on the 10th via the PM system. Not sure why it did not get to you.

Please let me know if you have any further questions.

Best
Craig


___

Hello Kevin

Here are the two standard ways to decipher VPH Vickers Plate Hardness or Vickers Pyramid Hardness. The later was the one I was referencing. It is the same as VH.

The carbon content is .4 of a percent, 40 percent carbon would be beyond any type of usability. Cast Iron is between one and three percent. The steels that some time go over one percent are hyperelctoid (not spelling that right) and need special techniques to achieve this.

Please let me know if you have any further questions.

Best
Craig
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Kevin S.





Joined: 25 Aug 2009

Posts: 54

PostPosted: Fri 11 Dec, 2009 12:15 pm    Post subject: Re: Weird         Reply with quote

Craig Johnson wrote:
Hi Kevin

I sent the message below on the 10th via the PM system. Not sure why it did not get to you.

Please let me know if you have any further questions.

Best
Craig


___

Hello Kevin

Here are the two standard ways to decipher VPH Vickers Plate Hardness or Vickers Pyramid Hardness. The later was the one I was referencing. It is the same as VH.

The carbon content is .4 of a percent, 40 percent carbon would be beyond any type of usability. Cast Iron is between one and three percent. The steels that some time go over one percent are hyperelctoid (not spelling that right) and need special techniques to achieve this.

Please let me know if you have any further questions.

Best
Craig


sorry for bothering you twice then, Blush . Thank you for your answer, Craig.
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