The American Welding Society (AWS) is the world's largest organization devoted to promoting welding and related processes, and to supporting all those who contribute to the industry- with links to related sites and services.
	The American Society for Nondestructive Testing, Inc. (ASNT) is the world's largest technical society for nondestructive testing (NDT) professionals.
	The American Foundry Society exists to provide and promote knowledge and services that strengthen the metal casting industry for the ultimate benefit of its customers and society.
	The Ductile Iron Society's objective is to advance the technology, art, and science of ductile iron production and to disseminate all such information to the members.
	NACE International provides education and communicates information to protect people, assets, and the environment from the effects of corrosion.
NDT RESOURCE CENTER	Community College NDT Resource Center is a good place to start if you are interested in learning about non-destructive testing principles, techniques and physics.