1、(Amendment Notice: December 14, 2015)The purpose of this amendment notice is to inform the public that a published standard has been technically corrected. An amendment is the correctionof an error in substantive content in a published standard that had been inadvertently approved by the required ap
2、proval procedures.AWS Amendment NoticeThe following Amendments have been identified and are incorporated in this reprint.2nd Printing: December 14, 2015AWS Standard: B2.1/B2.1M:2014Amendment Number: 1Subject: DefinitionsT. A symbol for base metal thickness, or for identifying a procedure qualificati
3、on variable for fracture toughness appli-cations, as appropriate.TS. A symbol for test specimen thickness.t. A symbol for weld metal thickness.AWS Standard: B2.1/B2.1M:2014Amendment Number: 2Subject: Subclause 4.14.8 (Electrical Characteristics)EBWEGWESWFCAWGMAWGTAWLBWOFWPAWSAWSMAWSW(2) A change exc
4、eeding 2% in the voltagefrom that qualified.Q(3) A change exceeding 5% in the beam orbeam focus current from that qualified.Q(4) A change in the beam pulsing frequencyor duration from that qualified.Q(5) A change in filament type, size, or shape. Q(6) A change in the type of power source,or a change in the arc timing exceeding1/10 second, or a change in amperageexceeding 10% from that qualified.Q(7) A change in the mode of metal transferfrom short circuiting to globular, spray,or pulsed and vice versa.Q
