Is there an "Adamantium" for the DC Comics universe?

…I don’t mean actual Adamantium, the material used in the bones of Marvel Comics’ Wolverine. I’m just curious if the DCU has any element, alloy, or material that’s as damned-strong and essentially unbreakable as Adamantium.

If not…how about a Vibranium analogue? You know, Adamantium’s non-union Mexican equivalent?
What are the best/worst comic book vehicles?

Adamantium: sure–inertron from Legion. Not quite as unbreakable as the Marvel equivilant, but pretty darn close.

Vibranium: The Teen Titans had something called “promethium” that had similar properties…sorta…kinda…

The worst vehicle ever was the “Spider-Mobile”. Picture a '70s dune-buggy with the red/black web-motif on it.

Doh…Sorry, that last line on the OP wasn’t supposed to be there. Mea culpa.

“Supermanium”, named for its inventor, was introduced in World’s Finest #41 (Jul-Aug 1949), well before adamantium.

What’s the differences between Vibranium and Adamantium?

And who invented this stuff?

Joe Anium.

Super. Thanks.

A Treatment of Special Metals

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There’s two types of both. “True” Adamantium–which nothing can physically damage. The Earth-1 Superman gets the cosmic cube and wishes he were as strong as possible and he still can’t bend a bar of the stuff. (he could disintigrate it or transmute it, etc. but it can’t be physically damaged. “Secondary” Adamantium is really, really, REALLY tough…but it can be physically damaged. If you ever see adamantium cracked/bent/broken/shattered/dented, it’s secondary adamantium.

Vibranium comes in 2 flavors as well. The “Antarctic” variety melts metals. Put it near steel, you’ve got a puddle of melted steel. The Wakandan (sp–where Black Panther comes from) variety (which is more common, tho still rare) absorbs vibrations. Captain America’s shield* was a freak mix of some sort of steel alloy and vibranium. The creator spent the next 20 years trying to duplicate the weird-ass properties of Cap’s shield and never quite managed, but did come up with Adamantium 40 years later.
*Which is NOT made in any way/shape/form of adamantium…see Avengers Annual 2000 or 2001 for an exhaustive discussion of this.

Astro

The information on Uru is at least partially incorrect. After somehow damaging Mjolnir, Thor had it repaired in a steel mill. One of the workers kept an uru chip, which led to his becoming (IIRC) Inferno. It was an innocent-man-killed-in-evil-scheme-comes-back-as-monster-to-wreak-vengeance kinda thing. I don’t recall if it occured in Thor or the Avengers.

Yes, Uru’s specialness is not in being overly strong or unbreakable. The reason Thor’s hammer is made of Uru is that it is particularly good at containing enchantment. In the case of Mjolnir, said enchantment allows him to control the weather.

What, no one mentions Marvelium? I believe Sivana also made his own material, but I can’t remember the name… Neither of which have ever turned up again, I’d bet.

Avengers, somewhere between issue 200 and 210 if I remember right.