Hello shorthood2006, you have received really great replies already. Consider that using coolant will extend the life of a blade considerably in certain situations, I put it that way due to the different uses that saws get and the different materials that many people cut with them. Cast iron is somewhat of an exception here, generally you should saw cast iron dry. All of the various blade pitches and tooth configurations have specific purposes and are suited to certain materials and thicknesses. Band speed should be a consideration if your saw has the capability to change this, generally, slower speeds are used for harder materials and thicker solid sections, faster speeds are generally used when cutting softer metals. Blades with more teeth/inch are used for hollow shapes and thinner sections. You also need to consider rate of blade fall when cutting any material, less tooth pressure for harder and hollow sections, more tooth pressure for cutting solid and softer materials. Most blade manufacturers or saw manufacturers will have charts and written materials available that will provide more of the specifics with regard to these parameters. In some cases cutting waxes will be a really good choice for using on saw blades, particularly on vertical band saws where they are using rubberized idler and drive wheels, or in some cases if you're using a portaband or similar type saw. There are synthetic coolants, cutting waxes, and good old soluble oil, you may consider trying some of these and seeing which best suits your purpose and pocketbook.
     As others have said: break-in new blades, try to use a band speed suited to your particular blade type  and the material you are sawing, if possible select the band saw tooth-type and configuration that best fits your sawing uses, and based on frequency of use and personal preference select a coolant if so desired. Best regards, aevald