Ice auger blades are made of high-quality steel and they can last for a long time if you take care of them. You need to sharpen the blades regularly to keep them in good condition.
If you use your ice auger blades frequently, they will eventually wear out and need to be replaced. How long they last depends on how often you use them and the type of ice you are drilling. If you are drilling through hard ice, the blades will wear out faster than if you are drilling through soft ice.
No matter what, you should always have a spare set of blades handy just in case your current blades need to be replaced. Having a spare set of blades will save you time and hassle if your blades need to be replaced in the middle of a fishing trip.
Overall, ice auger blades can last for a long time if you take care of them and sharpen them regularly. However, they will eventually wear out and need to be replaced. Make sure you have a spare set of blades handy just in case!