MEMBER ITEMS FOR SALE
Custom Knives | Other Knives | General Items
-------------------------------------------
New Posts | New PhotosAll Photos



Go Back   The Knife Network Forums : Knife Making Discussions > Custom Knife Discussion Boards > Knife Making Discussions > The Newbies Arena

The Newbies Arena Are you new to knife making? Here is all the help you will need.

Reply
 
Thread Tools Display Modes
  #1  
Old 12-09-2019, 11:46 AM
squigly1965's Avatar
squigly1965 squigly1965 is offline
Steel Addict
 
Join Date: Jan 2010
Location: Modesto, CA
Posts: 252
Foil or ATP-641 440c heat treating

I am making some knives from 440c. I have previously sent them out for heat treatment. but have decided to try my hand at it. I have a heat treat oven able to hold temp +- 2degrees F.

After some research Iíve come up with 2 possibilities.
Wrap in 309/321(not sure which) foil or coat in ATP-641.

ATP-641 Seems like it can be used but only found a couple instances of it being recommended. As it would be the cheapest option I would prefer it. I did see somewhere the Brownells antiscale product could cause pitting at temps above 1600F.

If anyone has good/bad experience with ATP-641 on 440c I would appreciate your insight

Thank you for your time
Chris
Reply With Quote
  #2  
Old 12-09-2019, 07:44 PM
jimmontg jimmontg is offline
Guru
 
Join Date: Jan 2016
Location: Now live in Las Cruces NM.
Posts: 1,233
I was appointed the heat treater at a machine shop because I made knives (really, no other reason), but had only ever used O1, D2 and 440C. They had a product for coating carbon steels mostly is what I was told. Apparently the ATP-641 doesn't hold up to long high temp soak times very well. I tried it on a piece of 440C at 1900 degrees and it cracked and it didn't look very good at all on the test piece. Worked great for O1, but not stainless or even A2. I had to use it for machined parts I couldn't wrap and the results were mixed until I set our oven up to take an argon atmosphere. The machinists worried about some of their parts or we sent the parts out, but on some parts some pitting was allowed as cosmetics were not important.

Believe me, if there was a coating material that consistently worked well for stainless heat treaters would be using it instead of the foil wrap which is expensive and labor intensive.
Reply With Quote
  #3  
Old 12-09-2019, 10:03 PM
Bob Hatfield Bob Hatfield is offline
Steel Addict
 
Join Date: Apr 2004
Location: Northern CA.
Posts: 108
Yes the heat treat SS foil is expensive for the initial buy. It comes in a 25 foot roll and you can heat treat up to 50 knives with that roll. when you spread the cost over 50 knives, the cost is very reasonable. I use a 6 inch section for one hunting knife, or you can use a 10 inch section for two knives and be able to heat treat over 50 knives.


__________________
RELH
Reply With Quote
Reply

Tags
440c, a, ca, carbon, coat, coating, degrees, hand, heat, heat treat, heat treating, heat treatment, hunting, hunting knife, knife, knives, made, making, material, shop, stainless, wrap


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Heat treating foil sold by the foot! Don Robinson The Folding Knife (& Switchblade) Forum 0 06-22-2005 09:11 PM
Heat treating foil sold by the foot! Don Robinson The Newbies Arena 0 06-22-2005 09:06 PM
heat treating foil snowblade The Newbies Arena 3 06-16-2005 09:43 AM
heat treating 440c W.B. Cameron Heat Treating and Metallurgy 3 02-06-2005 03:37 PM
Heat Treating Foil ? R. D. Finch Heat Treating and Metallurgy 7 07-08-2004 11:56 AM


All times are GMT -5. The time now is 05:27 PM.




KNIFENETWORK.COM
Copyright © 2000
? CKK Industries, Inc. ? All Rights Reserved
Powered by ...

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
The Knife Network : All Rights Reserved