temper 4140?

[villainvomit]

Okay....so I had a little time on my hands last weekend and spied a lonely stick of timkin 4142. Feeling the need to make something, I ground and filed out about a 19" blade plus handle. I am guessing this thing is around 28-32 rock and think it can be coerced into a little more.

If I am reading this correctly, timkin's sight says that 4142 as quenched hardness should be between 53-61 for smaller sections. I was unable to dig up a temper chart, but in the heat treat section they showed a temper of 1000 would leave me arount 28-32 again .......Other sites I have found show inconsistent hardness levels versus temp.

Anybody think this thing needs to be tempered at all (after I heat treat it)? Maybe temper @350 as a reliever? Or maybe torch the spine?

Any thoughts would be appreciated.

Note: This piece will not be sold and used only by myself in the backyard.

Clark
VV

 

[Mark Williams]

Try this wildman

http://www.nessteel.com/product3.htm

 

[mete]

Remember that some of these numbers are for large sections. 4140 is best used for hammers and 'hawks. A very nice steel and as a chopper knife wouldn't be too bad. You should be able to get in the high 50s for a blade as it's thin . Just temper at 400 F.

 

[villainvomit]

cool cool !
Thanks fellas!



VV
Clark