Well done, but not crunchy/burnt, I hate blue steak, meat it not supposed to be bleeding and not supposed to be black lol
Steak should also not be pink on the inside!
More like 77+ for well done.
70 would be medium-well
Rare to medium rare.
45C (bleu), 50C (rare), 55C (medium rare), 60C (medium) and 70C (well done).
http://www.guardian.co.uk/lifeandst...ted-rib-of-beef-with-bone-marrow-sauce-recipe
(There's a pic there, too... although it's captioned incorrectly).
http://bbq.about.com/od/steaks/ss/aa101606a_6.htm
And wiki has an inbetween figure
http://en.wikipedia.org/wiki/Steak
So what can we say, there's no fix temp.