carlomaderazo
Mechanical
I would like to know the minimum hardness test value requirement of P11 weld joint? As mentioned in the ASME standard is the maximum value only..
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Minimum Hardness Value of P11 Alloy weld
- Thread starter carlomaderazo
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carlomaderazo;
The minimum hardness value will depend on actual post weld heat treatment temperature and time, and original heat treatment condition of the base metals (annealed or normalized or normalized and tempered).
Assuming you did not exceed the lower critical transformation temperature during PWHT and were above the minimum PWHT temperature required by Code, I have seen hardness as low as 170 BHN in weld metal and surrounding P-No 4 base metals.
The minimum hardness value will depend on actual post weld heat treatment temperature and time, and original heat treatment condition of the base metals (annealed or normalized or normalized and tempered).
Assuming you did not exceed the lower critical transformation temperature during PWHT and were above the minimum PWHT temperature required by Code, I have seen hardness as low as 170 BHN in weld metal and surrounding P-No 4 base metals.
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