ASTM A193-B8M, CLASS 2
ASTM A193-B8M, CLASS 2
(OP)
The ASTM A193-B8M, Class 2 spec calls out a solution anneal and cold drawn material. The cold work is what kicks up the tensile strength on this material. Is there a way to tell how deep the cold work goes in the material when it is cold drawn? I have a customer who wants to machine some B8M, Class 2 material but is afraid he will machine all of the cold work off of the bar (he would be machining about 1/2" off a side). I told him that I am not 100% sure but think that would be enough to remove the cold work applied during the drawing process. Is there a way to tell how deep the cold work is applied to this material during the drawing process?
Thanks,
Greg
Thanks,
Greg
Greg
System 22, Inc.





RE: ASTM A193-B8M, CLASS 2
RE: ASTM A193-B8M, CLASS 2
Does this spec require that samples be tested any particular way?
Must they be take mid-radius for example?
Think about it, If you took a standard (1/2") tensile bar from near the surface, considering the diameter of the ends this bar will have a center line that is about 3/8" - 1/2" in from the surface. This is still fairly close to the surface.
If I was taking more than 1/4" total off the OD I would want a tensile test at either the mid-radius or at the center of the bar so that I knew what I was ending up with.
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