With the low scrap metal prices of today it's hard to make good money scrapping metal anymore.
But you still can if you continue to work hard.
The highest paying metals are the hardest to get but they are copper, aluminum, titanium cat converters and brass.
You can also do scrapping of electronics as some scrap circuit boards pay pretty good as well as scrap ram.
Beverage cans also usually pay pretty good although it takes a lot of them to get a good payout.