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PROCEDURE 6.1 Instruments may be used in an assay or grade mode. The accuracy of the instrument shall be checked by measurement against a known standard of each alloy type. Measured values shall be within 10 percent of the actual alloy content of the standard. 6.2 Instruments may be used in an assay or grade mode, when approved by Owner's Engineer. Follow-up analysis is required when alloy identification does not comply with the specified alloy. 6.3 All material to be tested shall be cleaned of any oil, grease, or dirt. The part shall be sanded to remove any mill scale, surface oxides or residual debris and to ensure that the readings obtained are representative of the base metal. No wire brush shall be used. The sandpaper shall be changed any time the material type is changed. Testing will then be performed and the major alloy elements shown in table 1 shall be recorded. If the material is not listed in Table 1 then the elements listed in ASME Boiler & Pressure Vessel Code, Section II, Part A, B or C shall be used, or as specified by the customer. ACCEPTANCE/REJECTION CRITERIA 7.1 The acceptance/rejection criteria will be per the ASME Boiler & Pressure Vessel Code, Section II, Parts A, B, & C, unless otherwise specified by the customer. 7.2 For all materials requiring PMI, acceptance criteria shall be as follows: 7.3 Assay or grade mode: the measured value of alloying elements shall be within 10 percent of the specified level or range in the applicable materials standards (example: for 5 Cr, where the allowable range is 4–6 percent, the measured value shall fall within the range 3.6 to 6.6 percent). Requirements for minor alloying elements are defined in Table 1 notes. 7.4 Assay or grade mode examination: the instrument shall confirm that alloys comply with the specified standard, within the accuracy given in Section 5, Item (1). 7.5 Test results shall conform to purchase documents and be properly identified to the applicable materials specifications. When required by the specification or drawings, materials shall be color coded in accordance with Owner's Specification, and/or marked per Section 6, of this Practice. 7.6 For weld metal PMI testing, or joints of similar base metals with matching filler, the acceptance criteria are based on the requirements of ASME Section II, Part C (ASME SEC II C STAMPING AND MARKING 8.1 All stamping and marking and/or color coding of the material shall be performed in accordance with the customer’s specification. 8.2 When heat treatment is performed after material verification, the identification marking and/or color coding shall be recognizable after such heat treatments. If the marking is unrecognizable, PMI testing shall be repeated. 8.3 Items which do not meet the PMI acceptance criteria shall be red tagged as HOLD and controlled in accordance with the non-conformances section of the PSI QA manual.

Table 1: Identification Elements Materials

Identification Elements

Materials

Identification Elements

C - 1/2 Mo

Mo

Alloy 20Cb-3

1 Cr - 1/2 Mo

Cr, Mo

Brass, Admiralty

Sn

11/4 Cr - 1/2 Mo

Cr, Mo

Brass, Naval

Sn

C**, Cr, Ni, Mo, Cb, Cu

21/4 Cr – Mo

Cr, Mo

Brass, Aluminum

Zn, Al

5 Cr - 1/2 Mo

Cr, Mo

90/10 Cu/Ni

Cu, Ni

7 Cr - 1/2 Mo

Cr, Mo

70/30 Cu/Ni

Cu, Ni

9 Cr - 1 Mo

Cr, Mo

Alloy 400

Ni, Cu

12 Cr (Type 405/410S) C**, Cr

Titanium Grades 1 and 2

Ti

12 Cr (Type 410)

Cr

Grade 12 Ti

Ti, Mo**, Ni**

17 Cr (Type 430)

Cr

Grade 16 Ti

Ti, Pd**

25 Cr (Type 446)

Cr

Grade 26 Ti

Ti, Ru

304

Cr, Ni

Alloy 182

Ni, Cr

304L

C**, Cr , Ni

Alloy 600

Ni, Cr

304H

C**, Cr, Ni

Alloy 625

Ni, Cr, Mo, Cb, Ti

309L

C**, Cr, Ni

Alloy 800

Ni, Cr, Al, Ti

309 CbL

C**, Cr, Ni, Cb

Alloy 825

Ni, Cr, Mo, Cu, Ti

310

Cr, Ni

AISI 4140

C**, Cr

316/317

Cr, Ni, Mo

AISI 4340

C**, Cr, Ni

316L/317L

C**, Cr, Ni, Mo

Alloy 2205

Cr, Ni, Mo

321

Cr, Ni, Ti

Alloy 2507

Cr, Ni, Mo

347

Cr, Ni, Cb

3.5, 5 and 9 Ni

Ni

Hastelloy C276

Ni, Cr, Mo, W

Notes to Table 1: * Percentages shall be within 10 percent of the limits specified in the appropriate standards/specifications. **Owner's Engineer shall specify identification methods for minor alloying elements (e.g., low carbon in Type 304L SS or Type 410S SS, minor alloying elements in various grades of titanium) Suitable methods for identifying minor elements include: specialized laboratory instrumentation, suitable optical emission analyzers, traceable mill certificates, or a combination of traceable mill certificates and chemical analysis using lower measurement sensitivity.

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