Nomenclature confusion 2

[rwelk]

I am looking to find the nomenclature behind astm stainless steels. I've noticed that often times the name is followed by something such as 'CB 30', or 'CF 10'.

Can anyone tell me what this extension to the name is? And preferably a webpage or book that has the nomenclature so I can figured out what is meant as soon as i see this naming system.

The other question i have is similar, what is the difference between AISI and ASTM? i realize they're just naming formats. I just finished school and we almost exclusively stuck to AISI, and now everything seems to be astm?

appreciate any help at all,

cheers

 

[metman]

rwelk,
Hang on. You should get an answer to your first question soon.
AISI: American Iron and Steel Institute
One of the organizations which has come up with alloy designation system. For steel it is typically equivilent to SAE.
ASTM: American Society for Testing Materials
Provides a vehicle by which material compositions, properties, test procedures, etc. can be explicitly governened by specifying one of these standards.

Jesus is THE life,
Leonard

 

[TVP]

rwelk,

First, let's clarify the situation with respect to AISI and ASTM. As metman already identified, these are two different organizations: one is an industry association that is comprised of 30 member companies, including integrated and electric furnace steelmakers, and 118 associate and affiliate members who are suppliers to or customers of the steel industry, while the other is a not-for-profit corporation that is one of the largest voluntary standards development organizations in the world. AISI used to develop alloy designations and nomenclatures but has long since stopped this activity. ASTM and SAE are the two SDO's in North America that maintain standards related to steel designation and nomenclature, and both use a system similar to that developed by AISI, in conjunction with the UNS system. For more information, see SAE J403 Chemical Compositions of SAE Carbon Steels, SAE J404 Chemical Compositions of SAE Alloy Steels, SAE J1086 Numbering Metals and Alloys, and ASTM E 527-83(2003) Standard Practice for Numbering Metals and Alloys (UNS).

Next, grades CB30 and CF10 are designations for cast stainless steel alloys according to ASTM A 743 and ASTM A 351, respectively. CB30 is a ferritic grade and CF10 is an austentic grade. SAE may also have similar grades in one of their standards, but I do not know for sure.

For more information, visit the websites of AISI, ASTM, SAE, and Key to Steel.