Shop Floor Talk

Shop Floor Talk (https://www.shopfloortalk.com/forums/index.php)
-   Fabrication (https://www.shopfloortalk.com/forums/forumdisplay.php?f=13)
-   -   New Project For allessence? (https://www.shopfloortalk.com/forums/showthread.php?t=51224)

astronut 09-07-2019 02:23 PM

New Project For allessence?
 
Maybe a new project for Jennifer to try or maybe even teach in her blacksmithing school?
https://www.facebook.com/1000heathen...6539094860280/

Lew Hartswick 09-08-2019 07:46 AM

Do you really think there is enough carbon in re-bar to harden it ?? :-)
...lew...

astronut 09-08-2019 07:53 AM

Quote:

Originally Posted by Lew Hartswick (Post 741593)
Do you really think there is enough carbon in re-bar to harden it ?? :-)
...lew...

I doubt it. From what I hear about rebar is that it is mostly made from "trash" metal.

Matt Shade 09-08-2019 09:16 AM

Rebar comes in different grades. There is rebar that has enough carbon to harden like glass (grade 60 IIRC, its mostly recycled rail axles from what I was told).
When I was in college one of the welding labs had a project where you had to forge a cold chisel with the idea being that you would learn forging, heat treating, and dye penetrate testing for quality control.
The quarter that I took it we got drops from a company that made wrenches and everyone got a piece of hex shaped stock. The following quarter they got a load of rebar delivered, the professor told me it made better chisels than the wrench drops.
The run of the mill rebar you pick up at home depot is not hardenable, but there is definitely stuff out there that is. I am always careful to test it when I use scrap stuff because I've gotten a few pieces over the year and had it harden when I didn't want it to.

Shade Tree Welder 09-08-2019 11:38 AM

Quote:

Originally Posted by Matt Shade (Post 741598)
Rebar comes in A LOT of different grades.

Re-bar is not junk steel, alloy vary a lot. I am sure there is a
high carbon grade that would harden well.

https://en.wikipedia.org/wiki/Rebar

LKeithR 09-08-2019 12:03 PM

Quote:

Originally Posted by Shade Tree Welder (Post 741600)
...Re-bar is not all junk steel...

But most of it is...

Fixed that for ya. In all the years that I have been working with steel--50+ years now--I've handled a lot or rebar and I have yet to find any that would make a decent axe or knife. Because I heard about the mythical "high carbon rebar" early on I have sampled and tested many pieces that I've scrounged from various places over the years. I have yet to find one that hardens up enough to be useful. Not sayin' that the good stuff doesn't exist but it's definitely not common...

terry lingle 09-08-2019 12:23 PM

The Mafia used a lot of the best rebar when they lost Jimmy Hoffa:)

I built a large lot of stern hooks for a fish camp out of rebar.
I did not use what the local lumber yard had in stock but contacted the rebar supplier and the rebar engineer selected the best choice for weld-ability and salt water usage.
IIRC it was the same price as the lower grade stocked by my local lumber yard.

Shade Tree Welder 09-08-2019 12:34 PM

Quote:

Originally Posted by LKeithR (Post 741603)
But most of it is...

Re-bar is designed for tensile strength, not machining, not forging, etc.
I bet the Class 75 has a good carbon content but is not common, like you
mention. Also the material made from rail would be hardenable. But again
likely not that common.

It only purpose is to provide something concrete does not have, tensile
strength. Concrete has great compressive strength. So by combining
the 2 you have a very good and inexpensive composite system.

Now go buy some 1065 or 5160 and hammer out your axe. I still think
that is a stupid design as no matter what steel you use, the axe part will
will act like a spring and suck as an axe.

randydupree 09-08-2019 01:09 PM

Thats a great ax,for cutting coonchow.

LKeithR 09-08-2019 04:02 PM

Quote:

Originally Posted by Shade Tree Welder (Post 741610)
...I bet the Class 75 has a good carbon content but is not common, like you mention. Also the material made from rail would be hardenable. But again likely not that common...

Another point to consider is that it is possible to put a decent edge on something made of mild steel...but the edge won't last at all.

Quote:

...I still think that is a stupid design as no matter what steel you use, the axe part will act like a spring and suck as an axe..
Yup, it will be very springy...

Quote:

Originally Posted by randydupree (Post 741613)
Thats a great ax,for cutting coonchow.

Is that anything like poontang? :eek:


All times are GMT -5. The time now is 02:04 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.