1090 Steel what do you think

T

Treg

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Jun 21, 2006
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Hey guys, I' m having and arguement with my brother about 1090 steel...he say's that it's a useless steel and I say it's a pretty decent steel...what do you think???
 
If you are making a spring, then you are correct. For knives, it is pretty useless. The highest RC you can get out of it is around RC42, which most would agree is a bit soft for a knife.
 
AISI 1090 Steel?
It ought to be fair enough stuff
C____0.85-0.98
Mn___0.60-0.90
P____0.04 (max)
S____0.05 (max)

It should be reasonably close to 1095 in performance.
 
Does looks close to 1095, so on paper it looks like it should be a sound performer. Would certainly be better in some applications than others. Wouldn't want to take it diving.
 
one of our other place brethren is having trouble with the translator engine. :) he's asking about steel is all i can get..can someone translate so we can help him out? 1090 should make a decent blade. several have come out recently in both 1095 and 1070 that are getting positive feedback. Just a guess but properly heat treated and tempered it would be ok. (hey our ancestors did it with a rock!)
 
A.P.F. said:
If you are making a spring, then you are correct. For knives, it is pretty useless. The highest RC you can get out of it is around RC42, which most would agree is a bit soft for a knife.
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RC42??? Where did you get that information? The difference between 1090 and 1095 is negligible. Because of difficulties with getting 1095 a few knifemakers have switched to 1084 and their results are excellent. Anything above 1060 can be used to make a great blade - with the correct heat treatment.
 
JCavSD said:
Does looks close to 1095, so on paper it looks like it should be a sound performer. Would certainly be better in some applications than others. Wouldn't want to take it diving.
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I wouldn't take 1095 diving either unless it had total blade protection with something like Glock's tenifer on it
 
antonio_luiz said:
RC42??? Where did you get that information? The difference between 1090 and 1095 is negligible. Because of difficulties with getting 1095 a few knifemakers have switched to 1084 and their results are excellent. Anything above 1060 can be used to make a great blade - with the correct heat treatment.
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From 'Steel Heat Treatment: Metallurgy and Technologies by George E. Totten

steel.jpg


Conversion from Brinell 388 to Rockwell 'C' scale = RC 41.8 for quenched and tempered.

For Austempered we find a bit more hardness of HB 415 or RC 44.5

If I am in error here, I will stand corrected.

Edit - Anecdotal evidence. Scroll down to post #15
 
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Yes, and 1095 shows similar data.

1090 is very similar to 1095. Both are soft until properly heat treated for cutlery.
 
If you compare 1090 vs 1095 steel compositions there is very little difference, and given the variances in the specs they can have exactly the same composition too.
I'd assume identical heat treat then would give the same 65-66HRC on both steels. 41HRC is not due to 1090s inherit features.
 
Thank's guy for all the replies...I'm gonna put it to the test this week-end and come back with feedbacks...Cheers!!!
 
You guys need lessons in metallurgy !!
Curtor - what does the UN know about knives ? or anything for that matter !
UN - schifoso !
CPM3V - tough chopper blade !!
Isn't the Katana steel about 1070 ?
The similar 1095 has been used for blades for at least 50 years that I know of.
Heat treat , heat treat , heat treat !
 
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