I think its pronounced "polly molly", my dad said thats the hardest metal out there... is that true?
2007-06-17 13:42:58 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
All steel is man-made, there are no "natural" steels. Do you mean metals in general?
Hafnium Carbide is one of the hardest metals, with a Knoop hardness value of 2300. Tool steel is pretty hard and is easier to make something with, but it's Knoop Hardness is only about 850 - less than half as hard. Silicon carbide has a Knoop Hardness of 2480.
2007-06-17 14:02:10 · answer #1 · answered by morningfoxnorth 6 · 0⤊ 0⤋
Is Steel Man Made
2016-11-07 05:36:09 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Your dad is probably referring to Chrome-Molly-Tungsten steel - it has a Rockwell hardness of "c" 52 and a tensile strength upwards of 268,000. This is not the "hardest metal out there" but among the metals that are commonly used, it's right up there with the best of them.
2007-06-17 15:57:47 · answer #3 · answered by LeAnne 7 · 0⤊ 0⤋
Arguably the hardest steel is Ferrium C69. As tool steel,
http://www.erasteel.com/us/applications/wear_parts.php
Do you have a problem with cobalt-cemented WC?
2007-06-17 13:53:58 · answer #4 · answered by Uncle Al 5 · 0⤊ 0⤋
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2016-04-11 00:32:27 · answer #5 · answered by Anonymous · 0⤊ 0⤋