Standard Reference Radiographs for High-Strength Copper-Base and Nickel-Copper Alloy Castings

Importancia y uso:

4.1 Personnel Qualification—Personnel utilizing reference radiographs to this standard shall be qualified to perform radiographic interpretation in accordance with a nationally or internationally recognized NDT personnel qualification practice or standard and certified by the employer or certifying agency, as applicable. The practice or standard used and its applicable revision shall be identified in the contractual agreement between the using parties. Personnel shall be authorized to perform radiographic interpretation by the employer. A certified Level III shall be available to assist with interpreting specifications and product requirements as applied to the reference radiographs (if the Level III is the radiographic interpreter, this may be the same person).

4.2 Reference radiographs for high-strength copper-base and nickel-copper alloy castings are intended to be used as a guide to the recognition of common discontinuities and their differentiation both as to type and severity level. Discontinuity types most common to these alloys are illustrated. Other discontinuity types such as hot tears, cracks, and unfused chaplets are illustrated in applicable Reference Radiographs E186, E192, and E446. For reference, descriptions of typical casting defects and corresponding radiographic indication types are contained in Section 5. Purchasers and suppliers may, by mutual agreement, select particular discontinuity classes (see 1.2) to serve as standards representing minimum levels of acceptability. (See Sections 7 and 8.)

4.3 Reference radiographs represented by this standard may be used, as agreed upon in a purchaser supplier agreement, for energy levels, thicknesses, or both, outside the range of this standard when determined applicable for the casting service application.

4.4 Procedures for evaluation of production radiographs using applicable reference radiographs of this standard are prescribed in Section 9; however, there may be manufacturing-purchaser issues involving specific casting service applications where it may be appropriate to modify or alter such requirements. Where such modifications may be appropriate for the casting application, all such changes shall be called-out in the purchaser supplier agreement or contractual document. Section 10 addresses purchaser supplier requisites where weld repairs may be required.

4.5 The following ASTM specifications illustrate alloys that may be used with these standards. It is intended that these reference radiographs also apply to related government and commercial material specifications.

Alloys

ASTM Specifications^A

 

   Aluminum Bronze

B148

   Nickel-Aluminum Bronze

B148

   Copper-Nickel

B369

   Manganese Bronze

B584

Alloys

Government Specification^A

 

Manganese-Nickel-Aluminum Bronze

MIL-B-21230A—Alloy No. 2.

Nickel-Copper

MIL-B-21230A—Alloy No. 2.

(A) See Section 2 for the complete title(s) of these specification(s).

Subcomité:

E07.02

Referida por:

A0990_A0990M-23, E1030_E1030M-21, E1030_E1030M-21, E3184-24

Volúmen:

03.03

Número ICS:

77.040.20 (Non-destructive testing of metals), 77.150.30 (Copper products), 77.150.40 (Nickel and chromium products)

Palabras clave:

aluminum bronze; casting discontinuities; copper; copper-nickel; gamma ray; manganese bronze; manganese-nickel-aluminum bronze; nickel-aluminum; nickel-copper; reference radiographs; X-ray;