ASTM E140
ASTM E140
(OP)
Hi All,
I am trying to convert HV1 to HV5 or HV10.
1. Table 1 of ASTM E140 shows vickers hardness as HV. What is the force value ? Is it HV1 or HV5 or HV10.
2. For a carbon steel material, is vickers hardness independent of force value ? i.e. 250 HV1 = 250 HV5.
3.How do you convert HV1 to HV5 or HV10.
Thank you in advance.
I am trying to convert HV1 to HV5 or HV10.
1. Table 1 of ASTM E140 shows vickers hardness as HV. What is the force value ? Is it HV1 or HV5 or HV10.
2. For a carbon steel material, is vickers hardness independent of force value ? i.e. 250 HV1 = 250 HV5.
3.How do you convert HV1 to HV5 or HV10.
Thank you in advance.





RE: ASTM E140
rp
RE: ASTM E140
RE: ASTM E140
Aaron Tanzer
www.lehightesting.com
RE: ASTM E140
rp
RE: ASTM E140
There is a load effect with microindentation hardness testing. Vandervoort has a good discussion in his metallography text (I don't enter the lab without it).
Certainly I do not expect absolute hardness measurement with MHT; I consider microindentation hardness testing more useful in detecting differences within a sample or between samples, especially welds. For hardened surfaces I do comparison testing on calibration blocks of similar material and known hardness.