As the most common way of joining two piece of metal, welding is used in almost every metal manufacturing industry, from automobile and aerospace manufacturing to structural metal production and building construction. The widespread use of welding combined with a reported shortage of qualified welders promises steady employment at anywhere between $10.00 and $24.00 an hour. A degree in welding will teach you a variety of welding methods and metallurgical techniques, as well as blueprint reading and the operation of electrical systems.