Here is a presentation table to help you choose the appropriate circular saw blade based on the wood or material to be machined and the diameter of the blade :

Material to be machinedBlade diameter (mm)Type of blade teethInformation
Softwood (pine, spruce, poplar, etc.)160-190Alternate teethSuitable for cross and rip cuts
Hardwood (oak, beech, ash, etc.)200-250Alternate teethSuitable for cross and rip cuts
Melamine, plywood, particleboard250-300Trapezoidal teethSuitable for cross and rip cuts
Rough wood250-300Flat teethSuitable for cross and rip cuts
Thin cutting wood (veneers, laminates, etc.)160-200Low-angle alternate teethSuitable for cross and rip cuts
Exotic wood (teak, iroko, etc.)250-350Alternate teethSuitable for cross and rip cuts
Non-ferrous metals (aluminum, brass, copper, etc.)250-350Alternate teethUse a blade specially designed for metals
Plastics and composite materials250-350Alternate teethUse a blade specially designed for plastics and composite materials

It is important to note that the choice of the circular saw blade will also depend on the electroportative machine used and the desired cutting depth. It is therefore recommended to check the machine's specifications and the manufacturer's recommendations before purchasing a circular saw blade.