ASTM B148 specifies the chemical composition and physical property of aluminum-bronze sand castings, ASTM B148 C95800, C95200, C95300, C95400, C95410, C95500, C95520, C95600, C95700, C95820, and C95900.
ASTM B148 specification establishes requirements for sand castings produced from copper-base alloys having the alloy numbers2, commercial designations, and nominal compositions shown in Table 1.
ASTM B148 Chemical Composition
2. The UNS system for copper and copper alloys (see Practice E527) is a simple expansion of the former standard designation system accomplished by the addition of a prefix “C” and a suffix “00.” The suffix can be used to accommodate composition variations of the base alloy.
ASTM B148 Mechanical Properties
A. As cast or temper annealed.
B. Normally supplied annealed between 1100 and 1300 °F for 4 h followed by air cooling.
C. ksi = 1000 psi.
D. See Appendix X1.
E. Yield strength shall be determined as the stress producing an elongation under load of 0.5 %, that is, 0.01 in. (0.254 mm) in a gage length of 2 in. (50.8 mm).
F. Yield strength at 0.2 % offset, min, ksi C (MPa) D .
G. For information only.
H. Copper Alloy UNS No. C95520 is used in the heat-treated condition only.
I. Sand castings and sand cast test specimens shall be 25 HRC minimum.