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Ed Caffrey's Workshop Talk to Ed Caffrey ... The Montana Bladesmith! Tips, tricks and more from an ABS Mastersmith.

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  #1  
Old 06-12-2008, 07:25 PM
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15N20 or?

Hi Ed

I am curious if steel type can be determined by markings on the steel? While I cannot say that I am a fan of using used, unknown steel, I have about 70 pounds of some steel that I suspect to be 15N20 that I got for the asking.

The reason I got it is because I found some markings on the steel that were the same as some 15N20 that I had purchased. The markings are "UDDEHOLM" with 3 circles enclosed in a rectangle before and after. Below that it says "Made in Sweeden"

Are these markings unique to 15N20 or is it just the markings of a Sweedish steel company that makes multiple steel types?


Thanks for any info
Brian


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Old 06-12-2008, 07:52 PM
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http://www.uddeholm.com/p_641.htm Brian, The company has all the data sheets available in pdf formats on the link I have posted. Congrats on the ABS stamp rating. Merle.


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Old 06-13-2008, 09:34 AM
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Hi Merle

Thanks for the info and the congrats.

Take care
Brian


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Old 06-13-2008, 11:19 AM
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Thanks Merle! My answer was going to be "likely", but nothing is 100% for sure. The link Merle provided is a good one to bookmark.


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Old 06-14-2008, 12:23 PM
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I bought some "15n20" from a saw manufacturer that got it from udeholm. The pieces were new with markings you described. I put it into some Damasucs and it had no contrast with the known 1080 I had purchased. I looked at the udehom site and they do sell a 10xx series so i am guessing it was a mix up at the factory. Do a test billet to see if you get any contrast then you can be more sure. better yet send it off for analysis and you would be absolutely sure.


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Old 06-16-2008, 09:25 PM
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Hi Chuck

I made up a billet and it does have good contrast. I would like to be sure though and am researching for a place that will test it.

Brian


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Old 06-16-2008, 11:17 PM
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Good idea. I did a search after this thread. Here is a couple I found, http://www.labinc.com/chemical.htm http://www.astonmet.com/gs/procedures.html

Don't know anything about either but they looked the best of the ones I called up.


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  #8  
Old 06-17-2008, 11:57 AM
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Hey Chuck

Thanks for the links. I contacted labinc and got a reply back already. The cost is $150 per sample with a turnaround of 2 to 3 days.

I have not heard back from the other company yet.

Thanks again
Brian


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Old 06-17-2008, 06:34 PM
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Whoa! That's a lot! Kelly Cupples once gave me a name and price of a lab to check steel, and it was like $35 or so. I wouldn't go sending off $150 until you search some more. I looked and I don't have Kelly's info anymore, sorry.


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Old 06-18-2008, 10:22 PM
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Cool Here is Kelley

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Old 06-18-2008, 10:25 PM
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Cool ok,, so it didn't

Ok,, so it didn't go through,,, send me a message through my web site,, and I'll sent you his e-mail address. Now,, your welcome!! ---Jon ..........(I do a lot of business with Kelley)


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  #12  
Old 06-20-2008, 02:45 PM
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I agree. $150 is a bit high. You can also contact Chuck Bybee at alpha knife supply. He has an outfit that does them also. The more he sends in the lower the cost. I was told about $25/sample but that is not a firm quote. I will be looking also in the near future. With Chuck being sick and Blade etc he has not had time to send out the 4 samples I sent him.

Good Luck and let us know what you find out.


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