ASTM B770 : 21

Standard Specification for Copper-Beryllium Alloy Sand Castings for General Applications

Standard Details

1.1 This specification establishes requirements for sand castings produced from copper-beryllium alloys. The following alloys are covered:

Copper Alloy UNS No.	Designation	Copper	Nickel	Beryllium
C81400	70C	99.1	...	0.06
C82000	10C	97	...	0.5
C82200	3C, 14C	98	2.0	0.5
C82400^A	165C, 165CT^A	97.8	...	1.7
C82500^A	20C, 20CT^A	97.2	...	2.0
C82510	21C	96.6	...	2.0
C82600^A	245C, 245CT^A	96.8	...	2.4
C82800^A	275C, 275CT^A	96.6	...	2.6
C96700	72C	67.2	31.0	1.2

1.2 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 The following safety hazard caveat pertains only to the test methods described in this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory requirements prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International StandardDetails, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.