Thanks for the comments, the video does not show the same detail of a bright fast moving spark as it does in person. Try yourself and hopefully you will see a difference, it is subtle and needs to be seen through a pair of safety glasses too.
A lot of structural steels are fairly low carbon but have about 1% or a bit more of Mn and and a small amount of Si as well. A rule of thumb for the hardenability of these steels is a carbon equiv content of C+(Mn+Si)/6. So for example a 0.2% carbon steel with 1.1% Mn and 0.4% Si would have a carbon equiv of about 0.45% and be somewhat hardenable. I think that this may be something like what you've got there.
Enjoying your video 101's.. Could I suggest that you warn people about grinding non-ferrous (especially aluminum) on a ferrous style grinding wheel, as that it can cause wheel explosions (if fouled enough) through different rates of metal debris heat expansion. I understand that you did this as a demonstration and I haven't seen all your video's yet, but perhaps you could show grinding wheel dressing to remove fouled areas in its surface. Cheers Garry
Great Video. Now the next thing would be the info regarding which welding technique (stick, wire, tig) & rod would be optimum for these materials. This is the kind of info that really helps, Thanks.
Thank you for this.. I'm wanting to fit some slightly protruding screws onto an RC car chassis to make it spark like you might see an F1 or Indy car do. I'd heard that titanium was the best (you can buy titanium buttons for that very purpose but they're ridiculously expensive, £30 for 4.!!!) but I don't have any at the moment, I do however have some "high tensile" m3 button heads that I might try. Does high tensile equate to high carbon.? Subbed & liked & best wishes from Scotland.
Is it ok to weld different types of steel with a mig welder? Im not sure what kind of steel i have, they could be the same.. they could be different lol buttttt i need them welded together.. any thoughts?
Respected Sir, Can you please tell me which grinding wheel (SiC or CBN grinding wheel) is suitable to surface grind Ti-6Al-4V? and which grit size should I use to do a rough cut, to remove 1mm material with a depth of cut of 0.025 mm per pass and the finishing pass will be carried out?
you know it's not smart to grind aluminum with a AO wheel. it can load up on the wheel and trap heat in that will cause a wheel to explode. not that your little test most likely hurt anything.
You can also dress the wheel to remove any captive alloy. I don't really like grinding wheels (except where the job actually makes them necessary like surface grinding or using my toolpost grinder) so I run 5/8"-11 threaded flap discs on the right-hand thread spindles of my bench grinders. A stack of flap discs lets me segregate them so what I use on aluminum won't be contaminated.
Thank you. I already know some of the basics of spark testing, but I didn't know about the titanium, and anyway, it's always good/ useful to have a refresher. Very informative, and I enjoyed watching it. THANK YOU.
I go by the look and feel of the material. Mild steel feels softer in the fingers and sounds softer when you tap it. Get some tool steel and mild steel next to each other and you can tell mostly what's what. Gets more complicated finding how they were treated, or if they were.
"tool steel", "cro moly", "magnanese steel", "spring steel", chrome plated steel, case hardened? The video is good but please do one just for the many more types of steel and skip the non-ferrous metals. How about a series on tools: chinese screw drivers vs name brands, bolts, sockets, etc.
Mild steel, long cool sparks, carbon steel shorter hot sparks, stainless steel dim cool short sparks, white cast iron lots of reddish orange sparks like carbon steel, gray cast iron short orange sparks, titanium bright white sparks, magnesium occasional greenish white sparks, aluminum no sparks, nickel dim red orange sparks, tool steel bright yellow sparks with forking, carbide dim red sparks on sic wheel.❤
I hear ya... for me, my old eyes need all the different known steels nearby when I do a spark test, cause without instantly comparing, id never pick up the differences. 🙂
i thought this was for different grades of steel not different metals entirely. off to find another video, trying to figure out this steel alloy i am working with
Aluminum alloys containing enough iron to create a change in the way aluminum oxidizes would be rare to see in our field. Most AL alloys are compositions of other elements to alter strength, malleability and thermal properties along with corrosion effects. Aluminum creates an oxide layer in normal atmospheric conditions so fast, most of the time, it is near impossible to remove the layer and affect the AL before the oxide coating reforms. Another thing aluminum has going for it is malleability, it deforms before cracking or splitting. With some grinding wheels, the AL will actually fill the pours and eventually coat the wheel if the conditions are right. Some alloys reduce this, but most of the time the oxide layer prevents the grains separated from the base from becoming incandescent.
You actually can grind aluminum on a bench grinder you just need to be sure you're using the proper wheels. Aluminum oxide which the most common and is usually grey is used for general purpose grinding of steel and if used to grind aluminum will do what is called loading the wheel where it essentially sticks in the grit and stays there and can only be removed by dressing. while silicon carbide (usually green or black) is used for grinding carbide tooling and soft material like aluminum and won't suffer the same loading effects.
That's useful, now I can identify aluminium and copper!!
Imma buy a grindin wheel so I can do that, too.
😂 Genius
Thanks for the comments, the video does not show the same detail of a bright fast moving spark as it does in person. Try yourself and hopefully you will see a difference, it is subtle and needs to be seen through a pair of safety glasses too.
A lot of structural steels are fairly low carbon but have about 1% or a bit more of Mn and and a small amount of Si as well. A rule of thumb for the hardenability of these steels is a carbon equiv content of C+(Mn+Si)/6. So for example a 0.2% carbon steel with 1.1% Mn and 0.4% Si would have a carbon equiv of about 0.45% and be somewhat hardenable. I think that this may be something like what you've got there.
Enjoying your video 101's.. Could I suggest that you warn people about grinding non-ferrous (especially aluminum) on a ferrous style grinding wheel, as that it can cause wheel explosions (if fouled enough) through different rates of metal debris heat expansion. I understand that you did this as a demonstration and I haven't seen all your video's yet, but perhaps you could show grinding wheel dressing to remove fouled areas in its surface. Cheers Garry
That's not true. It's not a bomb.
Great Video. Now the next thing would be the info regarding which welding technique (stick, wire, tig) & rod would be optimum for these materials. This is the kind of info that really helps, Thanks.
Thanks. was hoping to see cast iron. Have you ever ground on a Neodymium magnet? Try it. What a show!
Nice video, learned a lot. I wish it included cast iron or any iron.
Lots of black dust from carbon inclusions and almost non spark
Hi what metal gives out most sparks
Thank you for this..
I'm wanting to fit some slightly protruding screws onto an RC car chassis to make it spark like you might see an F1 or Indy car do.
I'd heard that titanium was the best (you can buy titanium buttons for that very purpose but they're ridiculously expensive, £30 for 4.!!!) but I don't have any at the moment, I do however have some "high tensile" m3 button heads that I might try.
Does high tensile equate to high carbon.?
Subbed & liked & best wishes from Scotland.
Wait so if I attach part of my regular kitchen knife to an rc car and drive it on the road will it make sparks ??
Maybe~ Try it out
LOL XD
Thanks so much for this video very helpful to see a video instead of just a picture.
You are welcome!
Thanks.
Thank you for sharing
Is it ok to weld different types of steel with a mig welder? Im not sure what kind of steel i have, they could be the same.. they could be different lol buttttt i need them welded together.. any thoughts?
Is the much difference in sparks between 304 vs 316?
Do you have a test for carbide steel?
Respected Sir,
Can you please tell me which grinding wheel (SiC or CBN grinding wheel) is suitable to surface grind Ti-6Al-4V? and which grit size should I use to do a rough cut, to remove 1mm material with a depth of cut of 0.025 mm per pass and the finishing pass will be carried out?
you know it's not smart to grind aluminum with a AO wheel. it can load up on the wheel and trap heat in that will cause a wheel to explode. not that your little test most likely hurt anything.
You can also dress the wheel to remove any captive alloy. I don't really like grinding wheels (except where the job actually makes them necessary like surface grinding or using my toolpost grinder) so I run 5/8"-11 threaded flap discs on the right-hand thread spindles of my bench grinders. A stack of flap discs lets me segregate them so what I use on aluminum won't be contaminated.
Great upload
What metal will spark the easiest
I learned. Thank you.
Glad it was helpful!
Thank you. I already know some of the basics of spark testing, but I didn't know about the titanium, and anyway, it's always good/ useful to have a refresher. Very informative, and I enjoyed watching it. THANK YOU.
Do magnesium spark?
Interesting! 👍
what does magnesium spark like ?
Rick Poulin Magnesium doesn't spark, it's non-ferrous.
Kurt Laws magnesium isnt iron? wow you learn something everyday.
Titanium is non-ferrous but it sparks?
And you rubbed them against what ? The cylinder?
Does nickel spark?
So helpful, thank you!
thank you very much. Good job. Will help me !
Very useful
What about brass??
Sir; what are you referring to, SPLITS?
The splits are the small branches of sparks off a main spark stream, sometimes I called them fingers
I like it!
Can anyone tell me the spark stream spread measurement (in mm/in/ft) of low carbon, med carbon and high carbon steel ?
Er, no by the look of it.
I go by the look and feel of the material. Mild steel feels softer in the fingers and sounds softer when you tap it. Get some tool steel and mild steel next to each other and you can tell mostly what's what. Gets more complicated finding how they were treated, or if they were.
What about cast?
"tool steel", "cro moly", "magnanese steel", "spring steel", chrome plated steel, case hardened? The video is good but please do one just for the many more types of steel and skip the non-ferrous metals. How about a series on tools: chinese screw drivers vs name brands, bolts, sockets, etc.
What about brass
Mild steel, long cool sparks, carbon steel shorter hot sparks, stainless steel dim cool short sparks, white cast iron lots of reddish orange sparks like carbon steel, gray cast iron short orange sparks, titanium bright white sparks, magnesium occasional greenish white sparks, aluminum no sparks, nickel dim red orange sparks, tool steel bright yellow sparks with forking, carbide dim red sparks on sic wheel.❤
I didnt notice the differences. I need 1/2 speed
I hear ya... for me, my old eyes need all the different known steels nearby when I do a spark test, cause without instantly comparing, id never pick up the differences. 🙂
i thought this was for different grades of steel not different metals entirely. off to find another video, trying to figure out this steel alloy i am working with
video says metal identification... METAL...
This also does show different steel alloys, high carbon steel, low carbon steel and stainless steel
Why does titanium spark? as it is non-ferrous.
This is because under normal atmospheric conditions, Titanium will burn before it melts.
Cheers, thanks for reply. Another question, why doesn't aluminium alloy spark when it does contain some iron ?
Aluminum alloys containing enough iron to create a change in the way aluminum oxidizes would be rare to see in our field. Most AL alloys are compositions of other elements to alter strength, malleability and thermal properties along with corrosion effects. Aluminum creates an oxide layer in normal atmospheric conditions so fast, most of the time, it is near impossible to remove the layer and affect the AL before the oxide coating reforms. Another thing aluminum has going for it is malleability, it deforms before cracking or splitting. With some grinding wheels, the AL will actually fill the pours and eventually coat the wheel if the conditions are right. Some alloys reduce this, but most of the time the oxide layer prevents the grains separated from the base from becoming incandescent.
good for something
I am spark tester ms carbon high carbon spring
2nd is high carbon steel nd Molly steel i think it's a 52100M
I see no difference in the sparks from the shitty steel and the higher carbon stuff.
I swear this is the same guy from black bear forge
Fraste Frie >:D
sound like black bear forge
TLDR: rocket science. better use spectroscope
DO NOT GRIND ALLOY ON A BENCH GRINDER
+Brian Wynn why not? ( just curious not saying your wrong or anything)
Soft metals like aluminum get stuck in the wheel and it's the trouble.
You actually can grind aluminum on a bench grinder you just need to be sure you're using the proper wheels. Aluminum oxide which the most common and is usually grey is used for general purpose grinding of steel and if used to grind aluminum will do what is called loading the wheel where it essentially sticks in the grit and stays there and can only be removed by dressing. while silicon carbide (usually green or black) is used for grinding carbide tooling and soft material like aluminum and won't suffer the same loading effects.
Steel is an alloy, titanium and aluminium isn't
@@shodanxx basically everything you use is some type of alloy, completely pure metals arent really used much