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Reference Hardness Values - PQR
Posted: 12 Feb 2026, 08:35
by arcpro
For materials in accordance with NACE MR0103, when qualified for welding should contain the same hardness values as mentioned with NACE, right?
Do you know any reference of this requirement?
Re: Reference Hardness Values - PQR
Posted: 16 Feb 2026, 05:56
by Dlew
Check Sec. 11 of API 577 and there exactly you will find this requirement listed.
That reference can be used in this particular case.
Re: Reference Hardness Values - PQR
Posted: 19 Feb 2026, 09:27
by irish
Yes in PQR, those are the values which should be mentioned and this is part of API 577.
And hardness testing during qualification is mandatory.