I am training to me a mechanical tech at the moment, although i am on a terrible wage (apprenticeship) when I'm out my time i should start on £24,000 a year. This is a starting wage and increase as you become more and more competent and experienced.
Hope this helps, it also changes widely from company to company.
Sorry, i see your not doing an apprenticeship, sounds like you have done a degree.
A friend of mine did a mechanical degree and has gone into project management.
His salary started at 29000, and within a year went to 32000, and hes at the bottom of the ladder.
Project management is something that my company have in line for me when I'm out my time, can't wait to start on a proper wage and make a good career for my self.
Once your in a company the limits are endless, (a big company mind)