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AISI Classifications

  1. Sep 8, 2007 #1

    I am currently studying a class called Materials Science externally. One of the assignments I have to do is in regards to AISI Classifications but I can not seem to get my head around it. I was wondering if someone could point me in some direction with this particular question:

    Nominate the American codes for the following listed metals and their uses:

    0.40% carbon steel
    1.3% carbon steel
    4% nickel alloy steel
    1% chromium alloy steel
    62% copper 35% zinc brass
    5% phosphate bronze
    99.6% alumium

    Where there are more than one code for any of the 8, nominate all of the codes.
    Where there are more than one use for any of the 8, nominate all of the uses.
  2. jcsd
  3. Sep 8, 2007 #2


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    A number of technical societies e.g. AISI, ASTM, SAE, etc, provide specifications for metals (alloys) and non-metals.

    For example stainless 304 (AISI grade), or 304SS, has the designation of S30400 in the UNS (Unified Numbering System), which is managed jointly by the American Society for Testing and Materials (ASTM) and the Society of Automotive Engineers (SAE). The Aerospace Materials Specification (AMS series) is maintained by SAE. The American Iron and Steel Institute (AISI) maintains a set of standards (specs) on steels.

    304SS is an 18-8 austenitic stainless steel, with about 18% (18-20) Cr and 8% (8-11) Ni, with Mn (~2%), Si (~1%), C (0.08% max) and other limits on impurities like S and P. See the spec - http://www.metalinfo.com/sample_standard.cfm - which has a comparison of various standards. The same material is covered by ASTM spec A276.

    For AISI grades, see - http://en.wikipedia.org/wiki/AISI_steel_grades

    AISI website is www.steel.org

    UNS - http://www.materialsengineer.com/E-UNS-designations.htm [Broken]
    Matweb search by UNS - http://www.matweb.com/search/SearchUNS.asp

    For discussion of stainless steel specifications and applications, see -
    More general - http://www.key-to-steel.com/default.aspx?ID=Articles

    In the US, the specifications include - ACI / AISI / SAE (AMS) / ANSI / API / ASME / ASTM / AWS / DOD / FEDERAL / MIL / UNS

    and cover the following elements and alloys
    Aluminum, Brass, Bronze, Carbon Steel, Copper, Iron, Lead, Magnesium, Nickel, Special Alloy, Stainless, Tin, Titanium, Zinc

    Each alloy class has its own set of specs by different organizations. The objective here is identify the class of alloy designated.

    For example, 0.4% carbon steel is a medium carbon steel, where as 1.3% carbon steel is a high carbon steel. See - http://en.wikipedia.org/wiki/Carbon_steel

    99.6% alumium - is nearly pure Al.

    Besides Wikipedia, one can search on Matweb - http://www.matweb.com/search/SearchComp.asp - by composition.

    Or search using Google for particular alloys.

    Specs from other countries:

    Australia - AS / ADS
    Austria - ONORM
    Belgium - NBN
    Bulgaria - BDS
    Brazil - ABNT
    Canada - CSA / DEF
    China - GB / YB
    Czechia - CSN / Slovakia - STN
    Denmark - DS
    Europe - EN / EURONORM
    Finland - SFS
    France - AIR / NF
    Germany - DIN / SEW / WNR
    Great Britain - BS / DEF
    Hungary - MSZ
    India - IS
    International - ISO / COMECON
    Italy - UNI
    Japan - JIS
    Mexico - NOM
    Netherlands - NEN
    Norway - NS
    Pan America - COPANT
    Poland - PN
    Romania - STAS
    Russia - GOST
    South Africa - SABS
    Spain - UNE
    Sweden - MNC / SIS
    Switzerland - SN / VSM
    Turkey - TS
    Yugoslavia - JUS
    Last edited by a moderator: May 3, 2017
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