3:07 pm
NWBA Member
August 16, 2010
5:57 pm
March 18, 2010
Depends on who they came from. I wouldn't bet on it. Junk yard steel rules apply. I've manufactured many similar commodity products and a lot depends on what I can get a good deal on or what I have laying around that would be suitable.
“There are painters who transform the sun into a yellow spot,
but then there are others who, with the help of their art and their intelligence,
transform a yellow spot into the sun.” ~ Pablo Picasso ~
3:19 pm
March 22, 2010
Well andy if you want to make some I have "lots" of 1 5/8" round 4140.... Just the right size for a 1 3/4" table
Actually I think I have 4 or 6 dogs that I am not using as well...
Whatever you are, be a good one.
Abraham Lincoln
5:27 pm
NWBA Member
August 16, 2010
Years back I bought a few acorn table dogs .I was told they were made of 4140.So during a dull moment back in the spring I forged myself a couple chunks that look like they could be alright hammers.I fit handles and used them a bit.Now I would like to harden them.I know I might be wasting my time but I am willing to learn from my mistakes.I got them up to a orange yellow then I bricked up gas forge and went home for the night.I understand next I should heat them up to 500 degrees and quench them in oil.I was hoping to use one of those temperture pens to indicate the 500 degrees.At this point in a perfect world I would have a hardend hammer head .Should I now temper ?......What I would like to figure out is a simple way to harden hammers with the tooling I have.{or can obtian cheaply]I do have some 4130 thats I plan to forge into hammers.So if these dont work out I still want a plan to heat treat my next victims.I got hammer smithing itch.....Thanks for your imput.
10:44 pm
March 22, 2010
Im not an expert Andy but 500 deg is not hot enough... I think 1500-1600 deg is the target range for 4140 When you draw it back I think 400-500 deg will give a good working hammer hardness..
If you want you can come down to the shop someday and we can do it.... I have a optical pyrometer that reads to 2500 deg and a quench oil tub set up ready to go
I have had good results with the hammers I have done out of 4340 but most of the time my 4140 tools I quench just the working end in water and then let the color run back almost to blue ( when the straw first starts to turn blue)
Whatever you are, be a good one.
Abraham Lincoln
5:30 am
May 30, 2010
Andy,
This is just my opinion but having used several different dogs to hold down plate I have found that much like and anvil hold down it just doesn't matter. In fact, I would say that the less it was hardened the better. 4140 is pretty hard like RHC of 28 as forged. I would use it to make some great hammers and use mild steel for the dogs. Just my 2 cents.
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