steel question...

[death-bringah]

Wow, man...haven't been here in a while, and everything's all different and cool... :cool:

Anyway, can anyone help me out? I have 2 Spydercos...a yellow-handle (!) fully serrated (!!) catcherman, labelled "AUS-8A", and a "Remote Release", labelled "AUS-8" (same as the catcherman, but with no 'A' after the 'AUS-8')

Are these 2 slightly different steels? :confused: Or 2 slightly different names for the same steel? :confused:

Any help or clues would be greatly appreciated.

my thanx...death-bringah

[Franco G]

2 slightly different names for the same steel.

Franco

[JD Spydo]

Hey "DB" where did you get the yellow handled "Catcherman" I took me 3 years of searching for the serrated and 75/25 versions in yellow. About the AUS-8A ( AUS-8); I have always liked that steel. I have heard that if you "Cryo-quench" it in liquid nitrogen that it becomes extremely tough stuff. However ( other than the fixed blade Bob Lum) I don't see the Great :spyder: Factory using it much anymore. Any body know why? :) :spyder: :) ????

[OutofGum]

That cryo stuff stuff sounds interesting. I know that they toughen up razor blades by dipping them in liquid nitrogen... something about giving it an extra temper or something like that. A google search will find the site.

I may have access to liquid nitrogen... do you have any more info on this? I might wanna try it on my AUS-8 Calypso Jr.

[death-bringah]

Thank you muchly for the :spyder: info.

I found the Catcherman at a website called "Dot's Attic". (I beleive that "Dorothy Ayoob" is the wife of 1 "Massad Ayoob") Another member of this forum posted about how he had found his "holy grail" of Spydercos there. Other members said to check it out.

I had seen the yellow-handle, fully-serrated Catcherman go on ebay for 75 dollars or more, which was more than I could afford. "Dot's Attic" had this 1 for only 32 dollars, so I grabbed it. At the time they also had a Yellow handle part-serrated, but that was about 2 months ago.

If you google "Dot's Attic" you'll find the site...don't know what they'd have left.`

my thanx...death-bringah

[severedthumbs]

That cryo stuff stuff sounds interesting. I know that they toughen up razor blades by dipping them in liquid nitrogen... something about giving it an extra temper or something like that. A google search will find the site.

I may have access to liquid nitrogen... do you have any more info on this? I might wanna try it on my AUS-8 Calypso Jr.


i would recommend not trying this.

[JD Spydo]

I in principle agree with you there severedthumbs. I know what you talking about when you say that you don't recommend cryo-quenching. I will clarify it by saying that if you do elect to do that to any of your blades that it should be done by a pro for sure. There is a lot to know about these exotic methods of metal tempering/hardening. I was in no way encouraging any one to do it themselves. Liquid nitrogen in potentially dangerous and must be handled with extreme care. JD ;) :spyder: :)

[severedthumbs]

yes tempering is a science for sure. if you must harden you blades more than they already are definately consult a pro.

[LJK]

I thought that Spyderco cryo quenched all their blades? Or is it just the newer high end stuff?

[severedthumbs]

depends on the steel

[fret]

Is it Liquid Nitrogen that is used by dermatologists to remove small skin growths such as warts? Is that the same chemical or something different. My dermatologist used some bubbling stuff in a styrafoam cup on a Qtip on my arm to remove a lump. It sounded kind of deadly and he was careful with it. It didn't hurt until a few hours later then the next day it really hurt. Kind of like a burn would feel. Also, my older Delica has AUS-8A on its blade. Why is there an "A" after the AUS-8 if they are the identical steel? Hmmm?

[severedthumbs]

thats it. it is also used to solvate fat from chickens. when you buy fat free chicken you will know it was N(aq) that did it. it is a wonderful solvent for many things.

[Zrexxer]

thats it. it is also used to solvate fat from chickens. when you buy fat free chicken you will know it was N(aq) that did it. it is a wonderful solvent for many things.Liquid nitrogen is used in immersion freezing in the poultry processing industry to increase production efficiency and prevent product from sticking to conveyors etc; but I have never heard of anything about using it to remove fat from chickens. Do you have a reference for that?

[severedthumbs]

yes the reference is my chem4 teacher.

[severedthumbs]

A rapid high-performance liquid chromatographic procedure for separation of the triacylglycerols (TG) of animal fats using refractive index detection is described. A LiChrospher-100 RP-18 (5m) column was used for th eTG-profiling of pork, beef, mutton, chicken and turkey fats. Seperation of fat in processed foods and lard in fat-admixtures is also discussed. TG-separation and checking genuinity and adulteration was achieved isocratically in ~15min. byusing CH3CN/CH2Cl 2(58:42, v/v) at ambient temperature.

best i could do for ya tonight buddy.

[OutofGum]

Science lab has tons of the stuff, its very cheap and it can be taken in a thermos for use in experiments. Always must be used with extreme care. It will give very bad burns with very short contact. Very fun to drop things like balloons, bananas, plastic bags in and see what happens.

[Zrexxer]

A rapid high-performance liquid chromatographic procedure for separation of the triacylglycerols (TG) of animal fats using refractive index detection is described. A LiChrospher-100 RP-18 (5m) column was used for th eTG-profiling of pork, beef, mutton, chicken and turkey fats. Seperation of fat in processed foods and lard in fat-admixtures is also discussed. TG-separation and checking genuinity and adulteration was achieved isocratically in ~15min. byusing CH3CN/CH2Cl 2(58:42, v/v) at ambient temperature.

best i could do for ya tonight buddy.Everything you cite is verbatim from a laboratory method published in 1995 in the Journal of Liquid Chromatography by researchers in Saudi Arabia for the detection of lard in pork products, and has absolutely nothing to do with the processing of chicken for human consumption in this country. I'd still like to see evidence of the usage you claim in processing poultry products.

[zackerty]

Out Of Gum
DO NOT USE LIQUID NITROGEN!!!
I am a knife maker, and I can assure you that it only works after the first heat treat, and BEFORE the tempering phase. No other way to do it.
I have used it, in protective clothing etc etc, and even tried it after the blade was finished, and it did very little, if anything.
What it does, is increase the Rockwell Hardness on the "C" scale a notch or two, and that is a good thing, as toughness seems to improve at the same time.
And of course, if you do it decide to do it anyway, if and when you freeze a body part, and kill the cells forever, it will be too late.
Please be carefull!

[sal]

Spyderco cryo's all of it's blades.

sal

[zackerty]

AND Spyderco knows what it is doing!!!

Sal,...I am really worried about someone getting a Thermos flask of Nitogen, and putting on a pair of leather gloves, and a pair of safety glasses, and dunking steel into it! Room temp anything dropped into Ni, makes it boil immediately. even blades of grass! The vapour that "boils" off can burn you.
Sub zero treatments DO work, and that is why all my blades are sub zeroed.

I converted an old refridgerator to sub my blades, and I stand about 6 feet away when I release the gas into the 'fridge. It still leaks out the vent holes I put in the door to release the pressure, and the vapour that gets out can still "burn" you.

Once again, OutofGum, be careful.
Stu