the permeability value is calculated with some standard like air. if the material permeability value should be greater than the permeability value of air it should be magnetised (ferromagnetic).. if the material permeability value less than the permeability value of the permeability value of...
what are the factors which may included to perform material test again. example, if the material stored in different temperature levels for a long time sure it have some changes in their mechanical behaviour.
I getting material from supplier (ex..2010 they send MTC)whether, it is acceptable.. in othercase finished product they manufactured in the year of 2012 they will send the MTC and mechanical strength test (load test) report in the same year...it is valid one or not.....
by using PMI(positive material identification)machine we can able to identify the difference.in this machine they are using X-Ray sources to find the composition of particular material.
