ASTM WK38300

    Work Item: ASTM WK38300 - Revision of B221 - 12 Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

    (What is a Work Item?)

    Active Standard: B221 - 13

    Developed by Subcommittee: B07.03 | Committee B07 | Contact Staff Manager



    1. Rationale

    Revise Note 3. The properties of 6064-T6/T6511 were revised upwards when the tentative registration was moved to final. The properties in Table 2 need to be revised. 2) 6013-T6/T6511 is registered and Alcoa requests its addition to B221 and B221. The alloy composition needs to be added to Table 1 and properties added to Table 2. 3) Footnote 7 for Suspect corrosion performance has been revised in ASD Table 6.4. The corresponding Table 4 in B221 and B221 should be changed to agree with the AA footnotes. (Note - the revisions of ASD were initiated in response to inquiries to ASTM standards) 4) There is no caution against using high Mg 5xxx alloys in high temperature applications such as provided in ASTM B928/B928M. In light of the Navy reports of sensitization for 5xxx extrusions in marine use, I am assuming that the concerns for sheet and plate in high temperature applications would be similar for extrusions. The note in ASTM B928/B928M is: NOTE 4-Alloys 5059, 5083, 5086, 5383, and 5456 should not be used for service, which provides prolonged exposure to temperatures exceeding 150F [65C] (whether continuous exposure or discontinuous exposure) because of the risk of sensitization and the resulting susceptibility to intergranular corrosion and stress corrosion cracking. Cold forming can also increases susceptibility to intergranular corrosion and stress corrosion cracking.


    Keywords

    aluminum alloy; extruded bars; extruded profiles; extruded rods; extruded tubes; extruded wire; UNS A91100 (Wr. alum. alloy); UNS A92014 (Wr. alum. alloy, heat treatable); UNS A92024 (Wr. alum. alloy, heat treatable); UNS A92219 (Wr. alum. alloy, heat treatable); UNS A93003 (Wr. alum. alloy); UNS A93004 (Wr. alum. alloy); UNS A93102 (Wr. alum. alloy); UNS A95052 (Wr. alum. alloy); UNS A95083 (Wr. alum. alloy); UNS A95086 (Wr. alum. alloy); UNS A95154 (Wr. alum. alloy); UNS A95454 (Wr. alum. alloy); UNS A95456 (Wr. alum. alloy, non-heat treatable); UNS A96005 (Wr. alum. alloy, heat treatable); UNS A96061 (Wr. alum. alloy); UNS A96063 (Wr. alum. alloy); UNS A96066 (Wr. alum. alloy, heat treatable); UNS A96105 (Wr. alum. alloy, heat treatable); UNS A96262 (Wr. alum. alloy); Aluminum--specifications; Aluminum alloys (rod)--specifications; Aluminum alloys (tube)--specifications; Aluminum alloys (wire)--specifications; Extruded bars/rods/wire; UNS A91060 (Wr. alum. alloy); UNS A96351 (Wr. alum. alloy, heat treatable); UNS A96463 (Wr. alum. alloy, heat treatable); UNS A97005 (Wr. alum. alloy, heat treatable); UNS A97075 (Wr. alum. alloy, heat treatable); UNS A97178 (Wr. alum. alloy, heat treatable); UNS A97072 (Wr. alum. alloy)
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    Work Item Status

    Date Initiated:
    07-11-2012

    Technical Contact:
    Greg Lea

    Item:
    001

    Ballot:
    COS (13-03)

    Status:
    Ballot Item Approved as B221-2013 and Pending Publication

    Item:
    003

    Ballot:
    B07 (12-03)

    Status:
    Ballot Item Approved as B221-2012a and Pending Publication