How many invulnerable objects from Krypton and other red sun/heavy gravity worlds ended up on yellow sun worlds? Just how durable did they end up being? I mean, did we ever see a Kryptonian rip a piece of a red sun paper on a yellow sun world?
Generally it was suggested that things from Red Sun worlds become PROPORTIONATELY tougher. That is to say, Superman could probably tear a piece of paper from a Red Sun world, but it is doubtful anybody else could. Remember, King Krypton was stronger than Superman was, because on Krypton, as a gorilla, King Krypton was stronger than Superman. Likewise, Superboy is stronger than Krypto, as a boy is always stronger than a dog.
How then, to explain the crushy ball trap in "Escape from the Fatal Five" (that's the story that you mentioned) in ADVENTURE COMICS #365 (1968)?
I mean, Superboy tore that thing like paper when he went all out despite the fact it was metal from a Red Sun world. The reason may perhaps be because of Krypton's higher gravity, living things get proportionately stronger when in lighter gravity conditions. Thus, despite the fact that Superboy could not tear metal on Krypton with his bare hands, he could because the lower gravity of earth (and, presumably, Talok VII, where this took place) gives him the proportionate strength to do so.
As nonliving matter does not need muscles to move on gravity conditions, living things from Krypton can perform feats of strength against even matter from Red Sun worlds.