ASTM B870-21

Standard Specification for Copper-Beryllium Alloy Forgings and Extrusions (UNS Nos. C17500, C17510, and C17540)

ABSTRACT
This specification establishes the requirements for copper-beryllium alloy forgings and extrusions. The following alloys are specified: UNS No. C17500 and C17510. The material of manufacture should be a cast billet conforming to the chemical composition requirements for the alloy specified. The product shall be manufactured by hot working or extrusion, solution heat-treating, precipitation hardening, and straightening. The material shall conform to the chemical composition for the alloy specified. The material shall conform to the electrical conductivity requirements specified. Hardness test and tensile test shall be made to conform to the requirements specified.
SCOPE
1.1 This specification establishes the requirements for copper-beryllium alloy forgings and extrusions. The following alloys are specified:    
Copper Alloy
UNS No.  
Nominal Composition, %    
Beryllium  
Cobalt  
Nickel  
C17500  
0.50  
2.6  
...  
C17510  
0.40  
...  
1.8  
C17540  
0.50  
1.5  
1.5  
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 to Sections 10 and 11 of 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 limitations 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 Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Sep-2021
• ICS: 77.120.30 - Copper and copper alloys
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.02 - Rod, Bar, Wire, Shapes and Forgings

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B870 −21
Standard Specification for
Copper-Beryllium Alloy Forgings and Extrusions (UNS Nos.
1
C17500, C17510, and C17540)
This standard is issued under the fixed designation B870; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Nickel-Beryllium, and Copper-Nickel-Lead-Beryllium
Rod and Bar (UNS Nos. C17500, C17510, and C17465)
1.1 This specification establishes the requirements for
B601 Classification forTemper Designations for Copper and
copper-beryllium alloy forgings and extrusions. The following
Copper Alloys—Wrought and Cast
alloys are specified:
B846 Terminology for Copper and Copper Alloys
Copper Alloy Nominal Composition, %
B950 Guide for Editorial Procedures and Form of Product
UNS No. Beryllium Cobalt Nickel
C17500 0.50 2.6 . Specifications for Copper and Copper Alloys
C17510 0.40 . 1.8
E8/E8M Test Methods for Tension Testing of Metallic Ma-
C17540 0.50 1.5 1.5
terials
1.2 Units—The values stated in inch-pound units are to be
E18 Test Methods for Rockwell Hardness of Metallic Ma-
regarded as standard. The values given in parentheses are
terials
mathematical conversions to SI units that are provided for
E1004 Test Method for Determining Electrical Conductivity
information only and are not considered standard.
Using the Electromagnetic (Eddy Current) Method
1.3 The following safety hazard caveat pertains to Sections
3. General Requirements
10 and 11 of this specification:This standard does not purport
to address all of the safety concerns, if any, associated with its 3.1 The following sections of Specification B249/B249M
use. It is the responsibility of the user of this standard to
form a part of this specification:
establish appropriate safety, health, and environmental prac- 3.1.1 Terminology,
tices and determine the applicability of regulatory limitations 3.1.2 Material and Manufacture,
prior to use. 3.1.3 Sampling,
1.4 This international standard was developed in accor- 3.1.4 Number of Tests and Retests,
dance with internationally recognized principles on standard- 3.1.5 Specimen Preparation,
ization established in the Decision on Principles for the 3.1.6 Significance of Numerical Limits,
Development of International Standards, Guides and Recom- 3.1.7 Inspection,
mendations issued by the World Trade Organization Technical 3.1.8 Rejection and Rehearing,
Barriers to Trade (TBT) Committee.
3.1.9 Certification,
3.1.10 Test Reports, and
2. Referenced Documents
3.1.11 Packaging and Package Marking.
2
2.1 ASTM Standards:
3.2 In addition, when a section with a title identical to that
B249/B249M Specification for General Requirements for
referenced in 3.1, above, appears in this specification, it
Wrought Copper and Copper-Alloy Rod, Bar, Shapes and
contains additional requirements that supplement those appear-
Forgings
ing in Specification B249/B249M.
B441 Specification for Copper-Cobalt-Beryllium, Copper-
4. Terminology
4.1 For definitions of terms related to copper and copper
1
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
alloys, see Terminology B846.
and CopperAlloys and is the direct responsibility of Subcommittee B05.02 on Rod,
Bar, Wire, Shapes and Forgings.
4.2 Definitions of Terms Specific to This Standard:
Current edition approved Oct. 1, 2021. Published November 2021. Originally
4.2.1 forging, n—a metal part worked to a predetermined
approved in 1996. Last previous edition approved in 2014 as B870 – 08 (2014).
shape by one or more such processes as hammering, upsetting,
DOI: 10.1520/B0870-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
pressing, rolling, and so forth.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on NOTE1—Forgedandextrudedshapesinthecontextofthisspecification
the ASTM website. are generally construed to be large-section products that are round, oval,
*A Summary 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
1

---------------------- Page: 1 ----------------------
B870 − 21
half round, geometric custom-ordered cross-sections, and asymmetrical TABLE 1 Chemical Requirements
metal shapes. This is to differentiate products supplied in accordance with
Composition, %
this specification as opposed to forged and extruded “Rod and Bar” in
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B870 − 08 (Reapproved 2014) B870 − 21
Standard Specification for
Copper-Beryllium Alloy Forgings and Extrusions Alloys
1
(UNS Nos. C17500 C17500, C17510, and C17510)C17540)
This standard is issued under the fixed designation B870; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification establishes the requirements for copper-beryllium alloy forgings and extrusions. The following alloys are
specified:
Copper Alloy Nominal Composition, %
UNS No. Beryllium Cobalt Nickel
C17500 0.50 2.6 .
C17510 0.40 . 1.8
C17540 0.50 1.5 1.5
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 to Sections 10 and 11 of 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 safety, health, and healthenvironmental practices and determine the applicability of regulatory limitations 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 Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
B194 Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B249/B249M Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
B441 Specification for Copper-Cobalt-Beryllium, Copper-Nickel-Beryllium, and Copper-Nickel-Lead-Beryllium Rod and Bar
(UNS Nos. C17500, C17510, and C17465)
B601 Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
B846 Terminology for Copper and Copper Alloys
B950 Guide for Editorial Procedures and Form of Product Specifications for Copper and Copper Alloys
E8/E8M Test Methods for Tension Testing of Metallic Materials
1
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod, Bar,
Wire, Shapes and Forgings.
Current edition approved April 1, 2014Oct. 1, 2021. Published May 2014November 2021. Originally approved in 1996. Last previous edition approved in 20082014 as
B870 - 08. DOI: 10.1520/B0870-08R14.– 08 (2014). DOI: 10.1520/B0870-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary 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
1

---------------------- Page: 1 ----------------------
B870 − 21
E18 Test Methods for Rockwell Hardness of Metallic Materials
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E1004 Test Method for Determining Electrical Conductivity Using the Electromagnetic (Eddy Current) Method
3. General Requirements
3.1 The following sections of Specification B249/B249M form a part of this specification:
3.1.1 Terminology,
3.1.2 Material and Manufacture,
3.1.3 Sampling,
3.1.4 Number of Tests and Retests,
3.1.5 Specimen Preparation,
3.1.6 Significance of Numerical Limits,
3.1.7 Inspection,
3.1.8 Rejection and Rehearing,
3.1.9 Certification,
3.1.10 Test Reports, and
3.1.11 Packaging and Package Marking.
3.2 In addition, when a section with a title identical to that referenced in 3.1, above, appears in this specification, it contains
additional requirements that supplement those appearing in Specification B249/B249M.
4. Terminology
4.1 For definitions of terms related to copper and copper alloys, see Terminology B846.
4.2 Definitions of Terms Specific to This Standard:
4.2.1 extrusion, n—a uniform metal shape, long in relation to its cross-sectional dimensions, produced by forcing a suitably
preheated billet
...