Can anyone advise standards which specify the location of test samples for quality control testing of large Q+T steel castings? Sometimes we use separely cast test blocks and other times integrally cast test blocks but the question is the same for both cases.
In particular I would like to know...
When purchasing bolting we request the Youngs modulus as part of the mechanical testing. We have found the results vary between 150000 and 207000 MPa for carbon steel bolting purchased to ISO 10.9 and 8.8.
All other mechanical testing results are satisfactory.
Can anyone please explain such...
Please advise the ASTM grain size to achieve "fine grain size" for castings in carbon steel, low alloy steel after normalisation + temper and quench + temper.
