You should be able to cut soft metal with either blade, but I’m not sure what results would be. When I got mine, I picked up several blades including a metal cutting blade. I looked under more accessories and it’s not listed on Amazon - sorry.
Toolcrib used to be a great online tool store that was an associate of Amazon. Last year, Toolcrib sold out and it’s all Amazon now. Since then, the service and deals have deteriorated badly.
I looked up the manual on servicenet and I looked at all the blades delta still supplies. They don’t have a metal cutting blade for the 9 inch BS, but do have one for the 10 inch???
I think if I was you I would return this to Harborfreight, who didn’t give you a good deal anyway. This BS was made by RYOBI for Delta and it’s a pretty low end tool to start with. For about the same money, I think you could get one in a local store, maybe at Sears, with all the blades you want, and verify it is good for cutting metal. Sears bench tools used to be made by Ryobi, but I think now they are Hitachi??? Or maybe that’s the hand power tools.
You need to find a variable speed, cheap bandsaw that has readily available metal cutting blades. Look at Ryobi, Craftsman, locally if you are going to be cutting soft non-ferous metals like brass, copper, thin aluminum, etc.
If you are going to be cutting STEEL etc, and still want to go with a low price product, then I would look on grizzly.com
Grizzly makes some good tools for the $$$ depending on what you want to do. One thing to remember with Grizzly is that you have to pay freight shipping. Also, you want to look at their high end stuff and then work down the list. Some of the very low end stuff they sell might only be good for a one-time job, while their middle range stuff, if it’s their newer products, are getting good user reviews on wood website etc - planers, jointers, tablesaws, etc.
Maybe you should be looking at a nice jigsaw? You can get a