nadumuthu,
we would like to know if any standards for callibration of brinell hardness testers are available, we have a few queries
1.Most of the test blocks supplied along with the testers are in steel and do not fall in the range used by us say 85-110BHN.Must the test block...
mr.nadimuthu
many thanks for your suggestions,
1.hardness is being checked by the same person at the same place -no change
2.hardness tester has been calibrated only recently, we have this problem only recently and only in a few items.
3.mg is around 0.4% only
4.even if ingot/return...
mr.nadimuthu,
a very excellent exchange of technical info as regards to heat-treatment of aluminium alloys. we have a peculiar problem- we face an excess hardness ranging from 117-121 BHN in LM25WP alloy. we follow solutionizing of 520+/- 5C for 5hrs and preciptation 170C...
