Comparison of Brinnel Methods E 10 & A 833

[weldtek]

I'm wondering how close one would expect results to be between portable Brinnel testing using a telebrinneller or equal, in accordance with A 833, and Brinnel testing in a stationary machine using a 3000 kg load?
I realize there's more variables in play with the portable test method, but, assuming it was carried out properly, in general what would you expect?

 

[redpicker]

The way I look at is is the portable method gives an "estimation" of the hardenss. The quality of the estimate depends a lot on how the method is used. In your example with the telebrineller, I know from personal experience that they can give results that are very close to the real hardness but can also give results that are off by more that 25%. Because of this, I wouldn't depend on the telebrineller for produce acceptance, only for an information device.

rp

 

[metengr]

weldtek;
In our company when portable hardness testing is specified, it is for information only. I have seen comparable (+/- 10% variance) between field and bench hardness hardness test results, and I have seen questionable results that after reviewing the portable hardness technique there was a problem with component geometry or surface preparation.

 

[dbooker630]

I have had success and good correlation using a King portable brinell. In some cases it is not practical to bring large samples back to the met lab for the bench Brinell.