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  1. 2design

    ASTM A656 grade 80 vs. ASTM A1018 HSLAS-F GR80

    Hello all, Just trying to figure out if I have ASTM A656 Grade 80 called out on the drawing but the 0.5" part is cut from ASTM A1018 HSLAS-F Grade 80, should I be concerned? The part is part of a weldment and is used in a dynamic (fatigue) environment. Are these different material specs...
  2. 2design

    Fatigue test welded test bars to predict componet life

    Hello, We are having some fatigue issues on welded structures. To help us predict better fatigue life, it has been proposed that we should make some fatigue test bars (coupons) and test then to come up with welded material fatigue curves. I've never heard this being done before for welds and...
  3. 2design

    Changing extensions lines to centerlines

    Hello, Can anyone tell me how to change extension lines in a drawing that indicate the center of a hole to a centerline? I am told this is an ANSI standard. Thanks in advance.

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