• Announcements

    • Alan Longmire

      IMPORTANT Registration rules   02/12/2017

      Use your real name or you will NOT get in.  No aliases or nicknames, no numerals in your name. Do not use the words knives, blades, swords, forge, smith (unless that is your name of course) etc. We are all bladesmiths and knifemakers here.  If you feel you need an exception or are having difficulty registering, send a personal email to the forum registrar here.  
Sign in to follow this  
Followers 0
matt ross

found 3 jackhammer bits at the pawn shop. should i pick them up?

5 posts in this topic

from what i understand jackhammer bits are usualy high manganese wich sucks for hamons. should i pick these up anyway? i think they were 7 bucks each but i could talk him down to 5 im sure. :rolleyes:

Share this post


Link to post
Share on other sites

They're usually 1045 with added silicon for toughness. Dunno about hamon, but they make good hardy tooling. I always snag 'em when I see 'em for cheap.

Share this post


Link to post
Share on other sites

The breaker hammer bits that I have are within the range for 1045, as Alan said, and as described in that link above. Grant Sarver suggested they might be something like 15B40, which is .4% carbon with a tiny amount of boron to improve hardenability. (He used to make these bits and had a bunch of his competitors' products tested.) That could be; the boron content in 15B40 is so low that it might have been written off as "trace" on the test results I got. (My bits don't have enough Mn to be 15B40, but they could be a similar proprietary alloy.)

 

For $5 each, they're probably worth buying. With the Mn and possibly B, I wouldn't expect them to make good hamon. (Is "hamon" the plural of "hamon"?) But you could use them to make tooling, small hammers, etc.

Share this post


Link to post
Share on other sites

Depends a lot on the manufacturer and from what time period. As a general rule, Brunner & Lay have been using a modified 1045 for as long as I can remember. Twenty years ago most of the others were using 1078. During the last twenty years people have experimented with many low alloys. Last I saw Vulcan was using 15B40. Some others like DelSteel and Pioneer were using 9260 in their premium line, 1078 for the rest. My own "Apex Alloy" was 8630. I've been away from it for ten years so some things may have changed.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0