ASTM International

Standard Reference Radiographs for Tin Bronze Castings
 N E310

Annotation

These reference radiographs illustrate various categories, types and severity levels of discontinuities occurring in tin bronze and related alloy castings. The reference radiograph films are an adjunct to this document and must be purchased separately from ASTM International if needed (see 2.2). Categories and severity levels for each discontinuity type represented by these reference radiographs are described in 1.2.

NOTE 1—The basis of application for these reference radiographs requires a prior purchaser supplier agreement of radiographic examination attributes and classification criterion described in Sections 4, 7, 8, 9, and 10 of this standard.

These reference radiographs consists of twenty-two 2? by 5?-in. (63.5 by 139.7-mm) nominal size reproductions originally exposed with low voltage X-rays. Fifteen of these were produced with 1 in. (25.4 mm) plate castings and seven (sand inclusions, inserts, chaplets) were produced with 3?4-in. plate castings originally derived for NAVSHIPS 250-537-1 and -2. The 1-in. plate castings cover gas porosity, linear shrinkage, and feathery shrinkage discontinuity types. The original radiographs illustrate discontinuities in sand cast 88:8:4 Cu-Sn-Zn, "G" type, bronze alloy plates and are representative of those found in wide solidification range copper-tin base alloys. Following is a list of discontinuity categories, types and severity levels for the adjunct reference radiographs of this standard:

Category A—Gas porosity; severity levels 1 through 5 for up to and including 2 in. (50.8 mm). (Called "Code A discontinuity type" in previous revisions).

Category B—Sand inclusions; severity levels 1 through 5 for up to and including 2 in. (50.8 mm). (Called "Code B discontinuity type" in previous revisions).