Micro Hardness for Hardness survey on PQR

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Topic American Welding Society Services / Technical Standards & Publications / Micro Hardness for Hardness survey on PQR

By Toey TNDT (**)

Date 10-11-2022 05:55 Edited 10-11-2022 06:06

Dear Expert
As API 660 requires a Micro-hardness test with comply Nace Standard

I suspected in ASTM E384 and hardness survey point of NACE MR0175
how to micro-hardness(tiny point) provide the correct requirement

Micro-hardness may be pressed at pearlite or bainite. ?

Regards

Topic American Welding Society Services / Technical Standards & Publications / Micro Hardness for Hardness survey on PQR