I also realize that there are other topics on this, but they have all dealt with specific examples, I am looking for some help in understanding the fundamentals of specifying a material. Thank you! ASTM standards consensus standards can generally be separated into 2 different types. One is a product standard that gives the various different categories of the materials and the other is procedure standard that gives the methods of testing to determine compliance with the individual product standards.
These standards have no legal authority until adopted by a code or design standard or by a model or local code or be specified by a designer. The best way to understand the systems and organization, is to look at the referred standards usually in one of the first sections of a particular standard to see what is used to determine the actual references for the standard.
Unfortunately the ASTM process is long and slow to update since the standards are written by individual members that spend their time and efforts in the process. There are no "corporate" votes, as far as I can determine, but many individuals are funded or supported by employers or contributing agencies municipalities, etc. It took me 10 years of waiting on a voting list before members resigned. Membership in ASTM is really very cheap because memberships are generally individual.
Dick Engineer and international traveler interested in construction techniques, problems and proper design. You need to look in the tables of the particular specs that you are using. The ASTM A general specs say general specification in the title, product specs simply state the applicable products.
Where appropriate, common names for the steels are also shown. There are some differences in the composition ranges for some grades between flat and long products. This is due to the harmonisation process which is aimed to bring US and European compositions into line.
This process is more advanced for flat products than for long. Some everyday components and objects like rods, fittings, flanges, pipes, plates, pressure vessels, and tubes are also included in ASTM.
ASTM has produced over standards and has huge coverage of products. It has an association with over experts of the technical domain required. It groups materials that exhibit similar characteristics, system, quality, and service. Both the institutions have different aims and goals but ultimately perform to create rules, regulations, awareness, and deliver the best quality products to the mass.
Both the institutions focus on market development and expansion. They develop standards of a product that will serve the community. They act as an interconnection between society, the environment, and the economy. The creation of the standards improves the lives of mankind. Both the institutions extensively focus to educate the consumers about the standards and checkpoints of any product. Both the institutions were established around the same time but AISI caters to a specific audience while ASTM is an international institution with global recognition and functioning.
Thanks a lot! ASTM is an international standard for material specifications and testing. AISI used to have a separate designation for ferrous materials until about 30 years ago. Our NACE region and acidic sour water calculator is now available. HTHA calculation is now available.
0コメント