[TheForge] 4140 vs 4340

Thu Apr 4 08:30:01 2002

Well I just bought some 4140 after reading this discussion, its for my air
hammer dies. The bar I bought is 38mm square and Im just going to grind it a
little then weld it to the die plate, this bar is already heat treated and
tempered by manufacturer, my question is welding it, does this stuff weld
ok? Id like to keep the factory heat treatment intact so am not sure about
preheat etc, I was going to use 7018 rod.

----- Original Message -----
From: "Dave Brown" <[email protected]>
To: "TheForge" <[email protected]>
Sent: Wednesday, March 27, 2002 7:18 AM
Subject: [TheForge] 4140 vs 4340

> In a recent thread 4340 was mentioned as good die material.  Does anyone
> have an opinion about 4140 for this same application?  Why?  I can get
this
> easier than I can get 4340.
>
> Dave Brown
> Heritage Smithing
> Green Bay, WI
> ABANA, UMBA, GoM, MODA, ARG
>
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