• Happy Thanksgiving to all of you! I hope that you all have something to be grateful for this year and for many years to come

  • The BladeForums.com 2024 Traditional Knife is available! Price is $250 ea (shipped within CONUS).
    Order here: https://www.bladeforums.com/help/2024-traditional/

  • America has reached 250 years, and I am grateful to be here, in the best country in the world. Thank every one of you who helps make this country a better place, those who have gone before and risked it all, and those who've paid the ultimate price to make the United States what we are today.

    Happy Birthday America! Let Freedom Ring for all time!

what grade of foil?

rocketmann

rocketmann

Joined
Dec 24, 2005
Messages
1,254
Guy's I just found out that I have a fastenal store 5 minutes from my house and I see that they offer grade 304, 321 &309 SSfoil. What is recommended for heat treating foil?? BTW it is all 12"X.002"X50'. Thanks alot...louis
 
I used 321 for some time and never had a problem with it to 1950 degrees. Since I am now doing lots of heat treat for others, I use the 309 - just because I should use the best on other peoples blades. I still use the 321 on my own - including this one which is shown right out of the plate quench with no cleaning up at all. (re-posted from an earlier thread)

foiltreat.jpg


I think I read somewhere you were heat treating in a forge. In that environment, I think I'd want the good stuff - at least!
 
thats the scale build up hahah sorta thats all the dirtyer blades get when you plate quench and have a good foil pack
betting no little bit of paper in ther to "burn off the oxagen"
i have not used paper in my foil for a while
 
rocketmann said:
Thanks Rob,,Why is the edge of the blade blue??
Click to expand...

The edge heats up first because it is thin. The paper in the envelope does eat up the oxygen - but paper burns at F 451 degrees - and that's pretty close to oxide forming temperatures. We've been experimenting with the idea of something having a lower flash point than paper. That blue on the edge just came off with the buffer (green compound). No sandpaper touched the blade after heat treat - for a nice mirror polish.

We haven't got it perfect yet - but we've come a long way from blades that ranged between dark grey and indigo rainbows. I haven't seen better out of anything short of a vacuum furnace.

Rob!
 
Louis; Don't buy any I have a whole roll over here. The next time you come over remind me to give you some.:D ;)
 
You must log in or register to reply here.
Back
Top