Standard Digital Reference Images for Tin Bronze Castings

Importancia y uso:

4.1 Reference images for tin bronze and related 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. For reference, descriptions of typical casting discontinuities and corresponding image indication types are contained in Section 5. Purchasers and suppliers may, by mutual agreement, select particular discontinuity categories (see 1.2) to serve as standards representing minimum levels of acceptability (see Sections 6 and 7).

4.2 Reference images 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. Section 9 addresses purchaser supplier requisites where weld repairs may be required.

4.3 Procedures for evaluation of production images using applicable reference images of this standard are prescribed in Section 8; 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.

4.4 The following ASTM specifications illustrate alloys covered by these standards; however, it is intended that these reference images also apply to related government and commercial material specifications:

Valve bronze castings

B61^A

Composition bronze or ounce metal castings

B62^B

Tin bronze sand castings

B584

Leaded red brass sand castings

B584

Copper-base alloy centrifugal castings (as applicable)

B271

(A) Similar to MIL-B-16541.(B) Similar to MIL-B-16444.

Subcomité:

E07.02

Volúmen:

03.04

Número ICS:

77.040.20 (Non-destructive testing of metals), 77.150.60 (Lead, zinc and tin products)

Palabras clave:

brass; casting discontinuities; copper; digital reference images; gamma ray; tin bronze; valve bronze; X-ray;