Hardness of Metals Chart

[lugnut]

While I was scanning through the Homemade Tools web page yesterday I spotted this "The Hardness of Metals" chart. I found it interesting and thought some of you guys might be interested in it. It is pretty small but I was able to expand it enough that I could read it.

[lugnut]

Wow, that came out a lot larger than I was expecting, should I delete it and repost a small version?

[Jim Stewart]

Looks fine to me.

-js

[Willy]

Wow, that came out a lot larger than I was expecting, should I delete it and repost a small version?

Looks perfect to me as well, thank you.

[Randy]

Interesting that steel is so far down the list, but I assume it's annealed mild steel. I'd like to see how hardened and tool steels rank.

[JRouche]

Great size and good info. Thanks. JR

[boslab]

Amazes me that everything in the universe is made from a cookbook of 118 ingredients, blows your mind.
nice chart, love it
mark

[mtraven]

Interesting that steel is so far down the list, but I assume it's annealed mild steel. I'd like to see how hardened and tool steels rank.

that what caught my eye too, its barley above aluminum.

hardened steels come in around 7-8 on the mohs scale.

[JRouche]

Amazes me that everything in the universe is made from a cookbook of 118 ingredients, blows your mind.
nice chart, love it
mark

Yeah, well yer cook book is a lil thin Sir. I have been watching the periodic table shift ever so slightly. I have been watching the table from about 7 years old. And no, I am not old, still a good 50 years of memorizing the table.. Sence I have been watching it we have added 12+ moles on the board. These are heavy and not to be touched. Just saying. JR

P.S. I meant to say, my two favorites on the map? Iron and Hydrogen. JR

[Stan Stocker]

Yeah, well yer cook book is a lil thin Sir. I have been watching the periodic table shift ever so slightly. I have been watching the table from about 7 years old. And no, I am not old, still a good 50 years of memorizing the table.. Sence I have been watching it we have added 12+ moles on the board. These are heavy and not to be touched. Just saying. JR

P.S. I meant to say, my two favorites on the map? Iron and Hydrogen. JR

Greetings,

It's always seemed to me that the synthetic elements (everything above 93) being man made are sort of a cheat on the table. Interesting, most or all likely exist for brief moments in supernovas and atomic bomb blasts, but you can't find them in nature in the majority of cases, and then it's in places like the cores of red giants or other hard to mine and refine places. They might be interesting as transient components in stellar nuclear chemistry to fill in some blanks in the first couple of seconds of a supernova.

Elements are the stuff the universe in made of, and these transuranic elements other than minuscule amounts of plutonium don't exist in the universe until we make them. To me, putting them in a separate sub-table feels more logical. One called "Stuff we've conjured" or maybe the Fabricatinides.

Some of them have long enough half lives to be useful, but as the weights keep moving up, so does the scale of the machinery and expenditures needed to create them.

Once past 103 or so, storage tends to be no problem as they disintegrate in very brief periods. Once past 110 you're usually talking milliseconds or less of half life. A very exciting couple of milliseconds perhaps, but not long enough to mix it up with some lanthanides and get the next great battery component :-)

Sort of like the biggest fusion bomb races, lots of technology, national mine's bigger bragging rights, some interesting things learned, but at the end of the day everyone figured out the gadgets themselves weren't of much use from a practical perspective. Then again, in pure research you never know if you'll gain useful knowledge or something beneficial. Given that Oganesson has only had five / possibly six atoms detected and a half life of 0.69 mS, it is a brilliant piece of nuclear chemistry, and may be technically an element, but it sure doesn't feel like a "building block of the universe" element to me :-)

Just to do the pointless how can this be on topic for a machining forum, I wonder what the optimal feed rate would be to face a slab of californium? At least it hangs around long enough to work with, although at about 27 Million USD per gram (before shipping costs, I hear UPS won't touch it) I don't think Speedy Metals will have it in stock...

Cheers,
Stan

[JRouche]

Greetings,
It's always seemed to me that the synthetic elements (everything above 93) being man made
Cheers,
Stan

That was nice, I enjoyed all of it. Thanks..

Man made? Super Nova made JR

[Corbettprime]

I have a question about mercury and lead? They both show the same hardness, yet at room temperature one is a liquid and the other a solid.

[lugnut]

Does any body know at what temperature mercury becomes solid ?

[Jim Stewart]

https://www.google.com/search?client=firefox-b-1-d&q=mercury+solid+temp

[lugnut]

-37.89℉ seems a little below ROOM TEMP to me