Jack hammer bit steel?

Raymond Richard · Jul 14, 2004

I've got a 2' long by 1 1/4" 6 sided bit I had forgotten I had. Any idea as to what the steel it? I was thinking maybe S-7 but the spark is way different......

Larry S. · Jul 14, 2004

not sure if this is any help:http://www.lametalsmiths.org/news/jack_hammer_bitts.htm

Larry S.

powells85 · Jul 14, 2004

According to this it's either L6, A6, or S7.

Raymond Richard · Jul 14, 2004

Larry, Thanks! I had found a name on the bit and it was a Brunner & Lay. I could make it out just a little and now I know what it says. I'll do a search for Brunner & Lay Moil Points and see if they can tell me what the steel is. I'm guessing maybe a 1050 or lower.......

ragnoor · Jul 14, 2004

Ray, I am thinking it is S-5, which is an oil quench steel.

Ken Beatty

Raymond Richard · Jul 14, 2004

Ken, Do you know what the alloy break down is on S-5 & 6? I'll see if I can find it. I'm positive it isn't S-7 since it was very simple to anneal plus the spark is totally different. Didn't think to compair it to L-6..... A-6 I would think is air hardening. After I annealed it it cut fine with my portaband.

etp777 · Jul 14, 2004

http://www.sousacorp.com/TS-Comp.htm

S5, S6 and a whole bunchof otehrs. You were right at Carbon range if they're s5/s6, around .5, same as 1050

Raymond Richard · Jul 15, 2004

Wasn't able to find the alloy break down for the S-5. Maybe Mete can if he's around.....

etp777 · Jul 15, 2004

It's on that link I posted Ray. Third section, Shock Resisting Tool steels, S1-S7(cept for S3)

Fox · Jul 15, 2004

Here ya go, Ray:

Carbon max 0.65
Mn 1.0
Si 2.25
Cr 2.0
Mo 1.35

Raymond Richard · Jul 15, 2004

I got the page bookmarked now, Thanks!

DaQo'tah Forge · Jul 15, 2004

well....so?....will it make a good knife or what?

Raymond Richard · Jul 15, 2004

I plan on using it for hawks. I've never tried forging it before, I may change my mind once I start. Should be perfect for hawks. I'll have to fiddle around with the heat treat.....

mete · Jul 15, 2004

S5 - nominal comp - .55C, .85Mn, 2.00Si, .25Cr, .20V, .40Mo,..Cr and V are optional. Forge 1850-2050F, Anneal 1400-1475F, Harden1600-1700F, Oil quench, Temper 300-800F.

Raymond Richard · Jul 16, 2004

Mete, What kind of hardness will I get with a 800 degree draw? Also thanks for the recipe!

mete · Jul 16, 2004

S5 temper - 400F-58Rc, 500-55, 600-52, 700-47,800-43.

Raymond Richard · Jul 16, 2004

Thank you!