Golf irons can wear out over time, but there is no evidence that they deteriorate. The average golfer who plays or practices several times a week can expect to get 7-10 years out of a set of irons. The longevity of golf clubs depends on how often they are used and how well they are cared for. New grips can be added to extend the life of the clubs, and modern hybrids have almost completely replaced long irons.
Investing in a quality set of golf clubs and taking good care of them will help them last longer. Beginner golfers should also consider what type of clubs to start with. If you are satisfied with the performance of your existing irons and maintain them well, they should last a long time. A professional fit can help you determine if your clubs are too old and need to be replaced.