drop stats when salvaging weapons/armor
There are 6 tiers for mats. wiki ‘crafting material’ and you can get the list of what mat is in which tier.
t1 : lvl 1 – 15
t2 : lvl 15 – 35
t3 : lvl 30 – 45
t4 : lvl 45 – 60
t5 : lvl 60+
t6 : lvl 75+
You’re more likely to get drops from zones at those levels too. Don’t forget drops also scale to your level, so farming a lvl 25 zone will still net you a majority of lvl 75+ drops when you’re on your level 80. So if you’re really into efficient/hardcore farming, you’ll be farming those zones with a character at that tier’s level.
But salvaging isn’t crafting. Level 59-80 items salvage into T5 mats with a chance, depending on the quality of the salvage kit of one tier higher, ie a T6.
This should give you an idea on average what to expect in salvaged mats.
http://legendsrpg.com/gw2.php?luck=yes&purpose=sell&lower_limit=0
RIP City of Heroes