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ASTM B427-09
- Standard Specification for Gear Bronze Alloy Castings
- standard by ASTM International, 10/01/2009
- Publisher: ASTM
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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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