リソースリンク
The American Foundry Society is the leading U.S. based metalcasting society, assisting member companies (metalcasting facilities, diecasters and industry suppliers) and individuals to effectively manage their production operations, profitably market.
THORS provides online education and productivity tools to enlighten and empower the manufacturing industry.
The main objective of the Ductile Iron Society is to advance the technology, art, science of ductile iron production and to disseminate all such information to the members. 
SAE International is a global association of more than 138,000 engineers and related technical experts in the aerospace, automotive and commercial-vehicle industries. SAE International's core competencies are life-long learning and voluntary consensus standards development.
Over 12,000 ASTM standards operate globally. They improve the lives of millions every day.Combined with innovative business services, ASTM standards enhance performance and help everyone have confidence in the things they buy and use.
ASM International is the world's largest association of metals-centric materials engineers and scientists. They are dedicated to informing, educating, and connecting the materials community to solve problems and stimulate innovation around the world.
JIS covers industrial and mineral products with the exception of (1) medicines, (2) agricultural chemicals, (3) chemical fertilizers, (4) silk yarn, and (5) foodstuffs, agricultural and forest products designated under the Law Concerning Standardization and Proper Labeling of Agricultural and Forestry Products.
This site is an ongoing project to present as much reference information as possible for people interested in mechanical design, manufacturing and engineering in general.