Making Prospecting Picks out of Hardox 450 Steel
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- เผยแพร่เมื่อ 4 ต.ค. 2024
- Today I'm cutting prospecting pick heads out of 3.2mm Hardox 450 steel, for Lisa and Tony Pilkington from Goldtalk Leonora.
I used Hardox 450 over 250 grade mild steel because of its greater yield and tensile strength.
Grade 250 mild steel has a yield strength of 250 MPa (mega pascals) and a tensile strength of 410 MPa, while Hardox 450 has a yield strength of 1200 MPa and a tensile strength of 1400 MPa.
Hardox 450 has a Brinell test rating of 450, and to learn more about Brinnel testing, check out this website:
www.hardnesste...
In early testing by Lisa, the Hardox 450 pick has stood up to all that she's thrown at it.
In fact, I was so impressed with the material, that I made myself one. I've just come back from 3 weeks prospecting in the goldfields of Western Australia and I'm happy to report that my pick doesn't show any wear or tear from digging up heaps of junk and a few yellow rocks.
To book a prospecting course with Goldtalk Leonora, check out their website:
www.goldtalkleo...
or their TH-cam channel:
/ @goldtalkleonora6881
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Music supplied by TH-cam's Audio Library: Country Blues, by Silent Partner.
Thanks again for watching and I'll see you in the next video.
Great vid mate.
Thanks Robert, appreciate your comments. I checked out your channel...you're right into your gold and your 3D printing; you must be flat out!
Plow discs work well as picks. You might have found some repeatable business with that idea!
One day i will make it back to Oz and get back into prospecting again!
Hi Ross, I've heard ploy discs work well, but they do have mounting holes in them. I went with the Hardox 450 and so far so good, I think these will last a long time. Talking to a couple of prospecting shops about these, too.
@@RustysMetalCutSignsDesigns Sounds good and wishing you luck in approaching the shops.
Thanks Ross.
Just lovely to see that your table is working like a champ👏🏻👍🏻 I just recently got mine in function, have some adjustments left to do then it will be full blast😈 Got some questions that I hope you might help me with, when I tuned in the travelspeed an THC, I got the right arcvoltage (1:1). In one occasion I forgot to put on the earthclamp on the workpiece, and after that I cant get the ”arc ok” on myplasm😣
Any experience on that mate?😳
Btw Great vid🍻
(sorry for my english)
Hi Glade and thankyou for your kind words. Regarding your set up, I don't use the 'arc ok' with my table. As for the earth clamp, I have a common earth point on my table and I have 4 connections to it....1 for the earth lead from the plasma cutter, 1 that connects to the side of the water table, 1 with an earth clamp that I use when cutting aluminium and 1 with a magnetic clamp, that I use for all steel plate.
If I forget to connect either the clamp or magnet, I still have an earth path through the material sitting on the water table slats....maybe you could do a similar thing.
@@RustysMetalCutSignsDesigns Smart mate, should have done that to. But I do believe my THC interface is done after my mistake😒
Another thing, I saw that your cut height was zero on this project?
When you set your THC voltage to '0', that's automatic mode. In this mode, the software records the arc voltage at the pierce height, then again when the torch comes down to cut height. It then tries to hold the arc voltage at the initial cut height, maintaining the correct distance between torch and material....making adjustments to the torch height, if there's any warpage in the material.
@@RustysMetalCutSignsDesigns Thx Rusty, i will try again🙂
Does hardox 450 have better impact resistance than hardox 600 when used as a pick?
Hi Dreamaera, I would think that Hardox 600 would offer a higher level of impact resistance, compared to Hardox 450, when used as a pick. However, from my experience with the Hardox 450 picks, they're plenty tough enough for prospecting.
Having said that, I did find this information online, courtesy of A&E Machine Shop, Inc's website, so this might help answer your question:
HARDOX 400 and HARDOX 450 are all-round wear resistant plates. Due to its high toughness, good bendability and weldability, the plates can also be used for load bearing duties in certain applications.
HARDOX 500 is a bendable and weldable abrasion resistant plate which is used in applications that demand higher wear resistance.
HARDOX 550 is a wear plate with a hardness of 550 Brinell and toughness equal to HARDOX 500. It is intended specially for heavy wear applications and targeted toward users and producers of wear parts using 12% manganese steel castings or 500 Brinell wear plates. The additional 50 Brinell you gain in hardness, when upgrading from 500 HBW steels, will increase wear life but not at the expense of crack integrity.
HARDOX 600 is wear plate with a hardness of 600 Brinell. It is indented specially for extreme wear conditions and competes with wear materials like high chromium white alloy castings, Ni-hards and hardfacing. In spite of its extremely high hardness the steel is weldable and can be machined as well as thermally cut. For its hardness, the steel also has uniquely high impact strength.