What Metal is around 256% stronger than steel?

In the game RuneScape, the concept of the fictitious metal, Rune has intrigued me. On an equal area AND weight basis (with a possible 10 lb exception) what metal is 256% stronger than steel?

Answer:
If you mean Mild steel which has a Ultimate Tensile Strength of 40 Kilograms/ sq.mm, there are many Heat-treated Alloy steels which are much stronger than this. For example, steels conforming to Grade-150-125, of ASTM A148 has a Ultimate Tensile Strength of 102 to 108 Kilograms/ sq.mm.

aluminum

Alumuniom

so that, it is used in Rockets and planes

another feature for Alumuniom, that it can bear a huge amount of heat.

Depending on carbon content, alloy content and heat treatment, steel can have almost any yield strength you want it to. It can be as low as 250 MPa or as high as 1700 MPa. That's more than your 256% difference right there. So maybe the answer should be "itself."

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What Metal is around 256% stronger than steel?

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