Historical
ASTM B427-09
Standard Specification for Gear Bronze Alloy Castings
1.1 This specification establishes requirements for alloys whose copper alloy numbers and nominal compositions are shown in Table 1. The castings may be furnished as one of three types: static chill, centrifugal chill, or sand cast.
1.2 The values stated in inch-pound units are to be regarded as the standard. SI values given in parentheses are for information purposes only.
TABLE 1 Nominal Composition
| Copper Alloy UNS No. | Previously Used Designation | Composition, % | ||||
|---|---|---|---|---|---|---|
| Copper | Tin | Nickel | Lead | Phos- phorus | ||
| C90800 | A | 87.8 | 12.0 | ... | 0 | 0.2 |
| C91700 | B | 86.3 | 12.0 | 1.5 | 0 | 0.2 |
| C90700 | ... | 87.8 | 11.0 | ... | 0 | 0.2 |
| C91600 | C | 88.0 | 10.3 | 1.5 | 0 | 0.2 |
| C92900 | D | 83.5 | 10.0 | 3.5 | 2.8 | 0.2 |
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ASTM International [astm]
ASTM International [astm]