ASTM B770-05
(Specification)Standard Specification for Copper-Beryllium Alloy Sand Castings for General Applications
Standard Specification for Copper-Beryllium Alloy Sand Castings for General Applications
SCOPE
1.1 This specification establishes requirements for copper-beryllium alloy sand castings for general applications and nominal compositions alloys defined by this specification are shown in .
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, which are provided for information only.
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 and health practices and determine the applicability of regulatory requirements prior to use.
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Designation: B 770 – 05
Standard Specification for
Copper-Beryllium Alloy Sand Castings for General
1
Applications
This standard is issued under the fixed designation B 770; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* B 824 Specification for General Requirements for Copper
Alloy Castings
1.1 This specification establishes requirements for copper-
B 846 Terminology for Copper and Copper Alloys
beryllium alloy sand castings for general applications and
E 527 Practice for Numbering Metals and Alloys (UNS)
nominal compositions alloys defined by this specification are
2
shown in Table 1.
3. General Requirements
1.2 Units—The values stated in inch-pound units are to be
3.1 The following sections of Specification B 824 constitute
regarded as standard. The values given in parentheses are
a part of this specification:
mathematical conversions to SI units, which are provided for
3.1.1 Terminology,
information only.
3.1.2 Material and Manufacture,
1.3 The following safety hazard caveat pertains only to the
3.1.3 Chemical Composition,
test methods described in this specification: This standard does
3.1.4 Dimensions and Permissible Variations,
not purport to address all of the safety concerns, if any,
3.1.5 Workmanship, Finish and Appearance,
associatedwithitsuse.Itistheresponsibilityoftheuserofthis
3.1.6 Sampling,
standard to establish appropriate safety and health practices
3.1.7 Number of Tests and Retests,
and determine the applicability of regulatory requirements
3.1.8 Specimen Preparation,
prior to use.
3.1.9 Test Methods,
2. Referenced Documents 3.1.10 Significance of of Numerical Limits,
3.1.11 Inspection,
2.1 The following documents in the current issue of the
3.1.12 Rejection and Rehearing,
BookofStandardsformapartofthisspecificationtotheextent
3.1.13 Certification,
referenced herein:
3 3.1.14 Mill Test Report, and
2.2 ASTM Standards:
3.1.15 Packaging and Package Marking.
B30 Specification for Copper Alloys in Ingot Form
3.2 In addition, when a section with a title identical to that
B 208 Practice for Preparing Tension Test Specimens for
referenced in 3.1 appears in this specification, it contains
Copper Alloy Sand, Permanent Mold, Centrifugal, and
additional requirements which supplement those appearing in
Continuous Castings
Specification B 824.
B 601 Classification for Temper Designations for Copper
and Copper Alloys—Wrought and Cast
4. Terminology
4.1 For definitions of terms relating to copper and copper
alloys, refer to Terminology B 846.
1
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
and Copper Alloys and is the direct responsibility of Subcommittee B05.05 on
5. Ordering Information
Castings and Ingots for Remelting.
Current edition approved May 1, 2005. Published May 2005. Originally 5.1 Include the following information for orders for prod-
approved in 1987. Last previous edition approved in 2002 as B 770 – 02.
uct:
2
The UNS system for copper and copper alloys (see Practice E 527) is a simple
5.1.1 ASTM designation number, title, and year of issue,
expansion of the former standard designation system accomplished by the addition
5.1.2 Copper Alloy UNS Number designation,
of a prefix “C” and a suffix “00”. The suffix can be used to accommodate
composition variations of the base alloy.
5.1.3 Temper,
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1.4 Quantity of castings required,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.5 Pattern or drawing number, and condition (cast, ma-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. chined, and so forth),
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B770–05
TABLE 1 Nominal Compositions
Copper Alloy Previous
Copper Nickel Silicon Beryllium Cobalt Chromium Iron Zirconium Tin Manganese
UNS No. Designation
C81400 70C 99.1 . . 0.06 . 0.8 . . . .
C82000 10C 97 . . 0.5 2.5 . . . . .
C82200 3C, 14C 98 2.0 . 0.5 . . . . . .
A A
C82400 165C, 165CT 97.8 . . 1.7 0.5 . . . . .
A A
C82500 20C, 20CT 97.2 . 0.3 2.0 0.5 . . . . .
C82510 21C 96.6 . 0.3 2.0 1.1 . . . . .
A A
C82600 245C, 245CT 96.8 . 0.3 2.4 0.5 . . . . .
A A
C82800 275C, 275CT 96.6 . 0.3 2.6 0.5 . . . .
...
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