band saw speed for metal?

Wood is porous. Doesn't generate or retain nearly as much heat as solid material like metal. Steel will expand and pinch the chips and the blade. You'll cut steel faster with coolant.
It varies with what type of metal too. I worked at a shop where we made thrust washers for aircraft landing gear actuators. Material was called aluminum nickle bronze. We had to ask how to saw the stuff. Set up like steel, coolant on, blade just sat there, hardly scarred it. The right tpi, blade speed and pressure, with coolant off got it done. every aspect of machining this stuff was different from anything we had ran before.