sry im using the direwolf 20 pack, and while yes drills dont break they cant be enchanted so i use them from clearing stone. for ores i use fortune picks.
a diamond drill only works like maybe an efficacy 2 diamond pick if i get efficacy 5 ill mine a hell of alot faster.
as for armour ok so ill just build nano then =P
Well if you're using the Mindcrack pack and hence have gregtech, why bother making them into tools and not just make the drill and chainsaw? They never break, you just have to recharge them.
As for the armor, I'm not too certain myself, but really there are better and easier armors to get: it's relatively easy to get a full quantum set before a blast furnace with GT since you can use rubies instead of diamonds.
So the main concern would really be their enchantability which is taken care of with Thaumium tools which are highly enchantable and can work on the same stuff as diamonds and, after you get four of them to feed the cycle, can beproduced with 8 nuggets (4 thaumium + 8 nuggets = 5 thaumium).
Basically, there are much better and easier things to get than steel tools when you take those factors into consideration, but as for your question, I sadly also cannot find the answer.
Steel is pretty much right in the middle of iron and diamond. And since one iron equals one steel there is no point to use any iron tools or armor. Iron tools have about 250 uses, steel has 800 and diamond 1500. Enchanting is the same as iron which is just a tad better than diamond. I would definitely recommend getting a steel pickaxe for Fortune III at least, you can keep repairing it with the anvil for quite a while. If you have Unbreaking III on it you will get 2400 ores Fortune'd with it which is already so much that you won't probably need another one too soon.
Diamond is still better if you can afford them. Maybe trade with blacksmith villagers for diamond tools and armor.
Oh okay, just pulled the number from memory. Don't have RailCraft available right now.This is wrong. Steel tools have 500 durability, not 800. If you press F3 + H it will actually allow to see the number based durability on all items, including IC2 tools, RP2 batteries, and other things.
You're right about that, but it is useful for Redpower 2's batteries. Shows the charge value as durability out of 1500. Good for measuring how much power a system uses.Oh okay, just pulled the number from memory. Don't have RailCraft available right now.
Btw, the IC2 items' durability doesn't tell much else besides the percentage of charge on the item. 27 durability is full and 2 is empty so 1 durability equals 4% of total. The total doesn't show without NEI so it isn't too useful, only visual aid.