Dear sir,
-- As per Hardness procedure we are often seeing that for P1 material 200 BHN
P4 material 220 or 230 upper limit, but in no case we i have seen lower limit for hardness.
Normally after PWHT Forging material hardness is going down distinctly may be 130-140 BHN.
So Please let us know what is lower limit for hardness and what is reference document for that?
Regards.
Ankit Gandhi.
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
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