Jump to content
I Forge Iron

Scrap Metal Composition List


Recommended Posts

Remember these are not "rules" but merely suggestions! So don't make a claim that you can't prove. (Not all leaf springs are 5160, almost no jackhammer bits are S series, etc; better to tell a client "forged from an old leafspring or jackhammer bit" than to say 5160 only to find it wasn't...)

Link to comment
Share on other sites

From my files: Grant, Sun 09 Oct 2005

JACKHAMMER bits have a hole down the center and go in a percussion drill (jackhammer). Paving breaker
bits are solid and go in a paving breaker. Yeah, I know, most people call 'em jackhammers. Having owned
a company for 18 years that produced millions of them probably makes me a little pickier than most. For
me, if a customer ordered a 1" x 18" jackhammer bit, I had better send the right thing.

As an aside to this, I've had just about every bit made spectrographed and never found one made from a
tool steel. The largest manufacturer (Brunner & Lay) uses a modified 1045 for all their bits.
Vulcan used to use 1078 (a high silicone 1080) but have changed to a boron steel in the last few
years. Most others (Delsteel, Pioneer, Ajax, Tamco) use either 1078 or 9260. I Had good success using
8640. You only have to remember that B&ampampL is water quench and the others are oil when you use them
to make other tools.

Me: S series would make a great bit and it's suggested as a use in Machineries Handbook. *however* it would be several
times more expensive than a plain steel bit and harder to repoint when worn as the heat treat is fancier too.
Just like stainless steel would make great car bodies---but save for the Delorean you don't see it used because of the cost!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...