Any blacksmiths here? Spring steel.

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Ahall

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I'll put one on the drill press tomorrow and give it the test. I can also pretty much tell hardness by running on a grinder. The sparks are different for a redneck method.
actually not as redneck as you might think
Back in the 1950's several steel companies published literature on how to read the sparks.
Its a bit of an art, but was once an accepted industry technique for classifying material.
 

dennishoddy

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actually not as redneck as you might think
Back in the 1950's several steel companies published literature on how to read the sparks.
Its a bit of an art, but was once an accepted industry technique for classifying material.
I called it redneck but learned how to read the sparks when working in a couple machine shops for around 20 years.
I did the test tonight. 60 Rockwell pocketknife scratched the mower blade, but a drill took a little effort to penetrate it.
Sparks were semi-light in color, not red.
I'm thinking hardness was around the mid 40's.
I do know the standard for a railroad spike is 46 Rockwell. Tested a few on some real testers. (I used to use the spikes to build food plot drags and was curious) Still have a bucket full and they redneck tested about the same.
Probably what is expected? Mower blades can't be a 60 or they would break on impact with rocks but need to be hard enough to endure some damage.
Too soft for a knife blade, so these and a few others go into the steel scrap.
 

2busy

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I called it redneck but learned how to read the sparks when working in a couple machine shops for around 20 years.
I did the test tonight. 60 Rockwell pocketknife scratched the mower blade, but a drill took a little effort to penetrate it.
Sparks were semi-light in color, not red.
I'm thinking hardness was around the mid 40's.
I do know the standard for a railroad spike is 46 Rockwell. Tested a few on some real testers. (I used to use the spikes to build food plot drags and was curious) Still have a bucket full and they redneck tested about the same.
Probably what is expected? Mower blades can't be a 60 or they would break on impact with rocks but need to be hard enough to endure some damage.
Too soft for a knife blade, so these and a few others go into the steel scrap.
I'd be curious what a sickle mower section would test at.
 

Mr.Glock

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