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Ferrite Point Count for Duplex SS Welds for WPS Qualification per NACE MR0175-2015 Ed.

Ferrite Point Count for Duplex SS Welds for WPS Qualification per NACE MR0175-2015 Ed.

Ferrite Point Count for Duplex SS Welds for WPS Qualification per NACE MR0175-2015 Ed.

(OP)
What is the minimum number of fields to be analyzed for ferrite point count for duplex stainless steel weld metal per NACE MR0175. This specification does not indicate this in Par. A.7.3.

RE: Ferrite Point Count for Duplex SS Welds for WPS Qualification per NACE MR0175-2015 Ed.

Read ASTM E562.

RE: Ferrite Point Count for Duplex SS Welds for WPS Qualification per NACE MR0175-2015 Ed.

You can also find some good general information in MR0103 App. D. This will point you to E562 as Metengr pointed out, but has some good practices for welding Duplex as well. (D6.3 - Ferrite Testing)

RE: Ferrite Point Count for Duplex SS Welds for WPS Qualification per NACE MR0175-2015 Ed.

The last sentence of A.7.3 states: "......shall be determined in accordance with ASTM E562......"

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

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