Fortunately we do have an HRC indenter but I'm sure we'll order an HRB one as well. It does make sense though with the measurement distance from the surface. I wonder why the customer called out an internal hardness in that area if the distance is shorter than 2.5 times the indenter diameter...
I'd have to rule out testing errors since we did do a correlation with two independent laboratories who's results almost matched my measurements within +/- 2HB. One lab was using a 2.5mm and one was using a 10mm ball. We're in the works to switch over to HRB I just heard so hopefully we won't...
Unfortunately our drawing allows the use of both methods (HB and HRB). They aren't converting the data. To them their making the argument that the parts are within the specified limits given their method of choice (which is the HRB method). Just mind boggling that it measures at the upper...
Our engineer asked about structure analysis and they said everything checked out fine. If I had a way to check it myself I'd like to see with my own eyes.
It's a large company with a very controlled normalizing process. They have been very reliable to us for many years. There may have been issues in their process of normalizing. I'm just wondering now if grain structure as described above is causing my data in HB to be so far out when the same...
Wow. Thanks for all of the responses. The material is SAE 1049S. It undergoes normalizing per TSH5101G. The forgings have an external and internal requirement which is the same (167 - 229HB or 86 - 98.2HRB). The external specification is well within spec however the internal specification...
There isn't much difference in the conversion, steel type, grain structure, etc. to make one chose either or? Both methods the part is mounted and polished and placed onto a table top hardness tester. Any insight to why a sample would measure 25 points above the upper limit of 229HB and using...
I work in an automotive manufacturing facility. We get forgings in that have certain hardness specifications. I'm trying to wrap my brain around an issue we're having and cannot find any information. We have a hardness requirement in HB. We use a 2.5mm tip @ 187.5kg load. Upon inspection of...
