More than you ever wanted to know, as usual.
At work, we're constantly putting pots and pans in dishwashers, more to expedite things and give the human dishwashers a break. The machines at work rinse in 180 degree water so there's an added benefit of sanitization. The laws are getting so strict that it is easier to use the machines than the classic "3-bay sink". Also, truthfully, the labor pool from which dishwashers spring have no understanding of basic sanitary practices. Think about it. These guys have never cleaned anything in their lives--their mothers did it for them. They wash things with dirty sponges and dry them with dirty towels. I'm constantly getting dirty looks for telling these guys that it's not OK to nest plastic containers together while they're still wet. (The other thing they do which is a riot is they like to put up to a gallon of Clorox in everything, so right before service the entire restaurant can smell like a pool!)It's a wonder that more people who go out to restaurants inthe US don't contract bad diseases. The machines are always the safer way to go. Aluminum pans will eventually suffer, but I never use any aluminum at home. With good knives, the school of thought is that the hot water, not the detergent, will eventually ruin the temper of the steel. But I rarely put knives in the machine, only when I am in a rush and want to sanitize them.
At home I use a Maytag WU-284 machine (which I love) as my "chefs dishwasher" for washing pots, pans and knives after parties when I am feeling lazy and just want to get everything done and out of sight. What's good about this machine is that it doesn't heat the water, so the knives are OK (both the cutting edges and the laminated handles), I let the chlorinated detergent do what sanitizing will be done and, face it, no automatic dishwasher has the ability to scrub cooked on food, so anything that doesn't come out clean gets a quick once-over by hand. Very satisfactory. Everything in my kitchen goes in the dishwasher except for my chocolate molds ( which will be destroyed in 1 washing) and my best knives.