ASTM B570-22

Standard Specification for Copper-Beryllium Alloy Forgings and Extrusions (UNS Nos. C17000 and C17200)

ABSTRACT
This specification establishes the requirements for copper-beryllium alloy (UNS nos. C17000 and C17200) forgings and extrusions. The material of manufacture shall be cast or wrought billet of C17000 or C17200 of such purity and soundness as to be suitable for processing into the products prescribed. The product shall be manufactured by hot working and heat treating as may be necessary to meet the properties specified. The product composition shall conform to the chemical requirements specified. The standard temper designations available under this specification and as prescribed in Classification B 601 are solution heat-treated TB00 (A) and precipitation heat-treated TF00 (AT). The product in the TF00 (precipitation-hardened (AT)) condition shall have a microstructure with a minimum of second phase (beta) constituents. When present, beta shall be fine and well dispersed. The product furnished under this specification shall conform to the prescribed hardness requirements. Tensile properties shall be determined in accordance with test methods E 8.
SCOPE
1.1 This specification establishes the requirements for copper-beryllium alloy forgings and extrusions produced from Copper Alloy UNS Nos. C17000 and C17200.
Note 1: Requirements for copper-beryllium alloy rod and bar appear in Specification B196/B196M (Section 2).  
1.2 Unless otherwise specified, Copper Alloy UNS No. C17200 shall be the alloy furnished whenever Specification B570 is specified without an alloy designation.  
1.3 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.  
1.4 The following safety hazard caveat pertains only to the test method(s) described in this specification:  
1.4.1 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.  
1.5 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-2022
• ICS: 77.150.30 - Copper products
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.02 - Rod, Bar, Wire, Shapes and Forgings

Relations

• Refers: ASTM E8/E8M-24 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Jan-2024
• Refers: ASTM B249/B249M-23 - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
• Effective Date: 01-Oct-2023
• Refers: ASTM B249/B249M-19a - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
• Effective Date: 01-Oct-2019
• Refers: ASTM B846-19a - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Aug-2019
• Refers: ASTM B249/B249M-19 - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
• Effective Date: 01-Apr-2019
• Refers: ASTM B846-19 - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Jan-2019
• Refers: ASTM B249/B249M-18a - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
• Effective Date: 01-Oct-2018
• Refers: ASTM B601-18a - Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
• Effective Date: 01-Oct-2018
• Refers: ASTM E18-18 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Jul-2018
• Refers: ASTM B601-18 - Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
• Effective Date: 01-Mar-2018
• Refers: ASTM B249/B249M-18 - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
• Effective Date: 01-Mar-2018
• Refers: ASTM E18-17 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Jul-2017
• Refers: ASTM B249/B249M-17 - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
• Effective Date: 01-Apr-2017
• Refers: ASTM B601-16 - Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
• Effective Date: 01-Oct-2016
• Refers: ASTM B249/B249M-16 - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
• Effective Date: 01-Oct-2016

Overview

ASTM B570-22 is the standard specification developed by ASTM International for copper-beryllium alloy forgings and extrusions, specifically for UNS C17000 and C17200. This standard establishes comprehensive requirements for the chemical composition, manufacturing processes, mechanical properties, and tolerances of these high-performance copper alloys. Products covered by ASTM B570-22 are valued for their exceptional strength, electrical conductivity, and resistance to fatigue and corrosion, making them critical materials in demanding applications.

Key Topics

• Material Requirements: Copper-beryllium alloys must be manufactured from cast or wrought billets of C17000 or C17200, meeting strict purity and soundness criteria.
• Chemical Composition: The composition of the materials should conform to specified limits for elements such as beryllium, nickel, cobalt, iron, aluminum, and silicon, with copper being the remainder.
• Product Forms: Covers forgings and extrusions, while rods and bars are specified under ASTM B196/B196M.
• Temper Designations: Products can be supplied in standard tempers such as:
  • M30 (As Hot Extruded)
  • TB00 (Solution Heat Treated - A)
  • TF00 (Precipitation Hardened - AT), which requires a microstructure with minimal and well-dispersed beta phase constituents.
• Mechanical Properties: The standard references requirements for tensile strength, yield strength, elongation, and Rockwell hardness, determined by standardized ASTM test methods.
• Heat Treatment: Detailed procedures for both solution and precipitation heat treatment to achieve the required temper and mechanical properties.
• Dimensional Tolerance & Finish: Dimensions, tolerances, and finishes are to be agreed upon by the supplier and purchaser, ensuring that the products meet application-specific requirements.

Applications

Copper-beryllium alloy forgings and extrusions produced as per ASTM B570-22 are widely used in industries where a unique combination of strength, electrical conductivity, and durability is essential. Common application areas include:

• Aerospace Components: Used in aerospace for high-strength parts requiring precision and resistance to environmental factors.
• Electronic Connectors and Contacts: Leveraged in electrical and electronic components needing high conductivity and mechanical stability.
• Automotive Parts: Ideal for wear-resistant and high-performance parts subjected to repeated stress and elevated temperatures.
• Industrial Tooling and Molds: Used where a combination of hardness, precision, and thermal conductivity is crucial.
• Defense and Military Equipment: Applied where reliability and strict material performance are required under demanding conditions.

Related Standards

The following ASTM and federal/military standards are closely associated with the requirements and testing methods outlined in ASTM B570-22:

• ASTM B196/B196M: Specification for Copper-Beryllium Alloy Rod and Bar
• ASTM B194: Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
• ASTM B249/B249M: General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes, and Forgings
• ASTM B601: Classification for Temper Designations for Copper and Copper Alloys
• ASTM B846: Terminology for Copper and Copper Alloys
• ASTM E8/E8M: Tensile Testing of Metallic Materials
• ASTM E18: Rockwell Hardness Testing of Metallic Materials
• ASTM E112: Determining Average Grain Size

Additional federal and military standards may apply for products procured for government use, covering packaging, marking, and quality assurance.

---

Keywords: ASTM B570-22, copper-beryllium alloy, forgings, extrusions, UNS C17000, UNS C17200, mechanical properties, heat treatment, aerospace alloys, electrical conductivity, copper alloy standards, ASTM copper alloy extrusions, industrial components.

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:B570 −22
Standard Specification for
Copper-Beryllium Alloy Forgings and Extrusions (UNS Nos.
C17000 and C17200)
This standard is issued under the fixed designation B570; 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* B196/B196M SpecificationforCopper-BerylliumAlloyRod
and Bar
1.1 This specification establishes the requirements for
B249/B249M Specification for General Requirements for
copper-beryllium alloy forgings and extrusions produced from
Wrought Copper and Copper-Alloy Rod, Bar, Shapes and
Copper Alloy UNS Nos. C17000 and C17200.
Forgings
NOTE 1—Requirements for copper-beryllium alloy rod and bar appear
B601 Classification forTemper Designations for Copper and
in Specification B196/B196M (Section 2).
Copper Alloys—Wrought and Cast
1.2 Unless otherwise specified, Copper Alloy UNS No.
B846 Terminology for Copper and Copper Alloys
C17200 shall be the alloy furnished whenever Specification
E8/E8M Test Methods for Tension Testing of Metallic Ma-
B570 is specified without an alloy designation.
terials
E18 Test Methods for Rockwell Hardness of Metallic Ma-
1.3 Units—The values stated in inch-pound units are to be
terials
regarded as standard. The values given in parentheses are
E112 Test Methods for Determining Average Grain Size
mathematical conversions to SI units that are provided for
information only and are not considered standard.
3. General Requirements
1.4 The following safety hazard caveat pertains only to the
3.1 The following sections of Specification B249/B249M
test method(s) described in this specification:
constitute a part of this specification.
1.4.1 This standard does not purport to address all of the
3.1.1 Terminology
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 3.1.2 Materials and Manufacture
priate safety, health, and environmental practices and deter- 3.1.3 Sampling
mine the applicability of regulatory limitations prior to use.
3.1.4 Number of Tests and Retests
3.1.5 Specimen Preparation
1.5 This international standard was developed in accor-
3.1.6 Test Methods
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 3.1.7 Significance of Numerical Limits
Development of International Standards, Guides and Recom- 3.1.8 Inspection
mendations issued by the World Trade Organization Technical
3.1.9 Rejection and Rehearing
Barriers to Trade (TBT) Committee.
3.1.10 Certification
3.1.11 Test Report
2. Referenced Documents
3.1.12 Packaging and Package Marking
2.1 ASTM Standards:
3.2 In addition, when a section with a title identical to that
B194 Specification for Copper-BerylliumAlloy Plate, Sheet,
referenced in 3.1, above, appears in this specification, it
Strip, and Rolled Bar
contains additional requirements that supplement those appear-
ing in Specification B249/B249M.
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
4. Terminology
and CopperAlloys and is the direct responsibility of Subcommittee B05.02 on Rod,
Bar, Wire, Shapes and Forgings.
4.1 Definitions:
Current edition approved Oct. 1, 2022. Published October 2022. Originally
4.1.1 For definitions of terms related to copper and copper
approved in 1972. Last previous edition approved in 2016 as B570–16. DOI:
10.1520/B0570-22.
alloys, refer to Terminology B846.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1.2 forging, n—a metal part worked to a predetermined
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
shape by one or more such processes as hammering, upsetting,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. pressing, rolling, and so forth.
*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
B570−22
TABLE 1 Chemical Requirements
5. Ordering Information
Composition, %
5.1 Include the following specified choices when placing
Copper Alloy Copper Alloy
orders for products under this specification, as applicable:
Element
UNS No. C17000 UNS No. C17200
5.1.1 ASTM designation and year of issue;
Beryllium 1.60–1.85 1.80–2.00
5.1.2 Copper Alloy UNS No. designation;
Additive elements:
Nickel + cobalt, min 0.20 0.20
5.1.3 Temper (Section 8) or condition (Section 12);
Nickel + cobalt + iron, max 0.6 0.6
5.1.4 Dimensions: thickness, width, length, and edges for
Aluminum, max 0.20 0.20
flat products; diameter, length, distance between flat surfaces,
Silicon, max 0.20 0.20
Copper remainder remainder
if any, and edges for all other products. Dimensions may be
specified on a drawing;
5.1.5 For extrusions: diameter, length (or mass), and
straightness as required;
5.1.6 Dimensional tolerances shall be as agreed upon be-
in the ordering information.
tween the manufacturer or supplier and purchaser;
7.1.1 Resultsofanalysisonachecksampleshallconformto
5.1.7 Quantity—total weight, or total length, or number of
the composition requirements within the permitted analytical
pieces of each size.
variance specified in Table 1.
5.2 The following options are available and, when required,
7.2 These composition limits do not preclude the presence
shall be specified at the time of placing the order.
ofotherelements.Byagreementbetweenthemanufacturerand
5.2.1 Tension test or hardness (Section 11),
purchaser, limits may be established and analysis required for
5.2.2 Finish (Section 14),
unnamed elements.
5.2.3 Grain size (Section 9),
5.2.4 Inspection report,
7.3 For alloys in which copper is listed as “remainder,”
5.2.5 Test report,
copper is the difference between the sum of results of all
5.2.6 Certification,
elements determined and 100 %. When all the elements given
5.2.7 Special marking or packaging,
in Table 1 are determined, the sum of the results shall be
5.2.8 If product is purchased for agencies of the U.S.
99.5 % minimum.
government, see the general requirements section of Specifi-
cation B249/B249M for additional requirements, if specified.
8. Temper
8.1 The standard tempers for products described in this
6. Material and Manufacture
specification are as follows:
6.1 Material:
8.1.1 M30—As Hot Extruded.
6.1.1 The material of manufacture shall be cast or wrought
8.1.2 TB00—Solution Heat Treated (A), Table 2.
billet of Copper Alloy UNS No. C17000 or C17200 of such
8.1.3 TF00—Precipitation Hardened (AT), Table 3.
purity and soundness as to be suitable for processing into the
8.2 The standard temper designations available under this
products prescribed herein.
specification are as prescribed in Classification B601.
6.1.2 The product heat number shall appear on the certifi-
cation or test report.
9. Grain Size
6.2 Manufacture:
9.1 The grain size, if required, shall be as agreed upon
6.2.1 The product shall be manufactured by such hot work-
between the purchaser and the manufacturer and shall be
ing and heat treating processes as to produce a uniform
determined in accordance with Test Methods E112.
wrought structure in the finished product.
6.2.2 The product shall be hot worked to the finish size and
10. Physical Property Requirements
subsequently heat treated when required, to meet the temper
properties specified.
10.1 Microstructure:
10.1.1 The product in the TF00 (precipitation-hardened
7. Chemical Composition
(AT)) condition shall have a microstructure with a minimum of
7.1 The material shall conform to the chemical composition second phase (beta) constituents. When present, beta shall be
requirements inTable 1for the copper alloy UNS No. specified fine and well dispersed.
TABLE 2 Mechanical Properties as Solution Heat Treated
Diameter or Copper Alloy UNS No.
Temper Designation
Thickness, C17000 C17200 C17000 C17200
A, B
Code Name in. (mm) Tensile Strength, ksi (MPa), max Rockwell Hardness, max
B Scale
TB00 solution heat-treated (A) all sizes 85 (590) 85 (590) 85 85
A
ksi = 1000 psi.
B
See Appendix X1.
B570−22
TABLE 3 Mechanical Properties After Precipitation Heat Treatment
Temper Designation
Yield Strength,
Diameter or Thickness
Copper Alloy UNS Tensile Strength, Elongation in Rockwell C
Code Name ksi (MPa),
A B, C D
No. ksi (MPa) 4×D, min, % Scale, min
in. mm
0.2 % Offset, min
TF00 precipita- all sizes all sizes UNS C17000 150–190 (1030–1310) 120 (820) 3 32
tion hard-
ened (AT)
TF00 precipita- Up to 8, incl up to 200 UNS C17200 165–200 (1140–1380) 130 (890) 3 34
tion hard-
ened (AT)
Over 8 to 12, incl Over 200 to 300 155–190 (1070–1310) 130 (890) 3 34
Over 12 Over 300 145–180 (1000–1240) 125 (860) 3 34
A
ksi = 1000 psi.
B
See Appendix X1.
C
The upper limits in the tensile strength column are for de
...

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: B570 − 16 B570 − 22
Standard Specification for
Copper-Beryllium Alloy Forgings and Extrusions (UNS Nos.
C17000 and C17200) Forgings and Extrusions
This standard is issued under the fixed designation B570; 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 produced from the following
alloys.Copper Alloy UNS
Nominal % Composition
Copper Alloy UNS No. Beryllium
C17000 1.7
C17200 1.9
Nos. C17000 and C17200.
NOTE 1—Requirements for copper-beryllium alloy rod and bar appear in Specification B196/B196M (Section 2).
1.2 Unless otherwise specified, Copper Alloy UNS No. C17200 shall be the alloy furnished whenever Specification B570 is
specified without anyan alloy designation.
1.3 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 whichthat are provided for information only and are not considered standard.
1.4 The following safety hazard caveat pertains only to the test method(s) described in this specification:
1.4.1 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 to determine the
applicability of regulatory limitations prior to use.
1.5 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
2.1 ASTM Standards:
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 Oct. 1, 2016Oct. 1, 2022. Published November 2016October 2022. Originally approved in 1972. Last previous edition approved in 20102016
as B570–06(2010).B570–16. DOI: 10.1520/B0570-16.10.1520/B0570-22.
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’sstandard’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
B570 − 22
B194 Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B196/B196M Specification for Copper-Beryllium Alloy Rod and Bar
B249/B249M Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
B601 Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
B846 Terminology for Copper and Copper Alloys
E8/E8M Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E112 Test Methods for Determining Average Grain Size
3. General Requirements
3.1 The following sections of Specification B249/B249M formconstitute a part of this specification.
3.1.1 Terminology,Terminology
3.1.2 Materials and Manufacture,Manufacture
3.1.3 Sampling,Sampling
3.1.4 Number of Tests and Retests,Retests
3.1.5 Sample Preparation,Specimen Preparation
3.1.6 Test Methods,Methods
3.1.7 Significance of Numerical Limits,Limits
3.1.8 Inspection,Inspection
3.1.9 Rejection and Rehearing,Rehearing
3.1.10 Certification,Certification
3.1.11 Mill Test Report,Report
3.1.12 Packaging, Marking, Shipping and Preservation.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 Definitions:
4.1.1 For definitions of terms related to copper and copper alloys, refer to Terminology B846.
4.1.2 forging, n—a metal part worked to a predetermined shape by one or more such processes as hammering, upsetting, pressing,
rolling, and so forth.
5. Ordering Information
5.1 Include the following specified choices when placing orders for products under this specification, as applicable:
5.1.1 ASTM designation and year of issue,issue;
5.1.2 Copper [Alloy]Alloy UNS No. designation (Section designation;1),
5.1.3 Temper (Section 8) or condition (Section 12),);
B570 − 22
5.1.4 Drawing showing the shape, dimensions, and tolerances, if required,Dimensions: thickness, width, length, and edges for flat
products; diameter, length, distance between flat surfaces, if any, and edges for all other products. Dimensions may be specified
on a drawing;
5.1.5 For extrusions: diameter, length (or mass), and straightness as required;
5.1.6 Dimensional tolerances shall be as agreed upon between the manufacturer or supplier and purchaser;
5.1.7 Quantity—total weight, or total length, or number of pieces of each size,size.
5.1.6 If an extrusion: the length (or mass) required, straightness as required,
5.2 The following options are available but may not be included unless and, when required, shall be specified at the time of placing
of the order, when required:the order.
5.2.1 Tension tests test or hardness (Section 11),
5.2.2 Finish (see Section (Section 1514),
5.2.3 Grain size (see Section (Section 9), and
5.2.4 Inspection report,
5.2.5 Test report,
5.2.6 Certification,
5.2.7 Special marking or packaging,
5.2.8 If product is purchased for agencies of the U.S. Government (see the Supplementary Requirementsgovernment, see the
general requirements section of this specification)Specification B249/B249M for additional requirements, if specified.
6. Material and Manufacture
6.1 Material:
6.1.1 The material of manufacture shall be cast or wrought billet of Copper Alloy UNS No. C17000 or C17200 of such purity and
soundness as to be suitable for processing into the products prescribed herein.
6.1.2 The product heat number shall appear on the certification or test report.
6.2 Manufacture:
6.2.1 The product shall be manufactured by such hot working and heat treating, when required, to meet the temper properties
specified.treating processes as to produce a uniform wrought structure in the finished product.
6.2.2 The product shall be hot worked to the finish size and subsequently heat treated when required, to meet the temper properties
specified.
7. Chemical Composition
7.1 The material shall conform to the chemical composition requirements in Table 1 for the copper [alloy]alloy UNS No.
designation specified in the ordering information.
7.1.1 Results of analysis on a check sample shall conform to the composition requirements within the permitted analytical variance
specified in Table 1.
B570 − 22
TABLE 1 Chemical Requirements
Composition, %
Copper Alloy Copper Alloy
Element
UNS No. C17000 UNS No. C17200
Beryllium 1.60–1.85 1.80–2.00
Additive elements:
Nickel + cobalt, min 0.20 0.20
Nickel + cobalt + iron, max 0.6 0.6
Aluminum, max 0.20 0.20
Silicon, max 0.20 0.20
Copper remainder remainder
7.2 These composition limits do not preclude the presence of other elements. By agreement between the manufacturer and
purchaser, limits may be established and analysis required for unnamed elements.
7.3 For alloys in which copper is listed as “remainder,” copper is the difference between the sum of results of all elements
determined and 100 %. When all the elements given in Table 1 are determined, the sum of the results shall be 99.5 % minimum.
8. Temper
8.1 The standard tempers for products described in this specification are given in as follows:Tables 2 and 3.
8.1.1 M30—As Hot Extruded.
8.1.2 TB00—The standard temper designationsSolution Heat Treated (A), Table 2available under this specification and as
prescribed in Classification .B601 are TB00 solution heat-treated (A) and TF00 precipitation heat-treated (AT).
8.1.3 TF00—Precipitation Hardened (AT), Table 3.
8.2 The standard temper designations available under this specification are as prescribed in Classification B601.
9. Grain Size
9.1 The grain size, if required, shall be as agreed upon between the purchaser and the manufacturer and shall be determined in
accordance with Test Methods E112.
10. Physical Property Requirements
10.1 Microstructure:
10.1.1 The product in the TF00 (precipitation-hardened (AT)) condition shall have a microstructure with a minimum of second
phase (beta) constituents. When present, beta shall be fine and well dispersed.
11. Mechanical Property Requirements
11.1 Hardness—Tensile Strength Requirements: The product furnished under this specification shall conform to the hardness
requirements prescribed in Table 2 for the solution heat-treated condition and Table 3 after precipitation heat treatment, unless
tensile properties are required by the purchase order. Rockwell hardness shall be determined in accordance with Test Methods E18.
TABLE 2 Mechanical Properties as Solution Heat Treated
Diameter or Copper Alloy UNS No.
Temper Designation
Thickness, C17000 C17200 C17000 C17200
A, B
StandardCode FormerName in. (mm) Tensile Strength, ksi (MPa), max Rockwell Hardness, max
B Scale
TB00 solution heat-treated (A) all sizes 85 (590) 85 (590) 85 85
A
ksi = 1000 psi.
B
See Appendix X1.
B570 − 22
TABLE 3 Mechanical Properties After Precipitation Heat Treatment
Temper Designation
Yield Strength,
In.
Elongation in
Copper Alloy Tensile Strength, ksi
D
Standard Former mm Rockwell
4×D, min,
A B, C
UNS No. ksi (MPa) (MPa), 0.2 %
%
C Scale
Offset, min
TF00 precipita- UNS C17000 150–190 (1030–1310) 120 (820) 3 32–
tion hard-
ened (AT)
Up to 8, incl up to 200; 165–200 (1140–1380) 130 (890) 3 36–
TF00 precipita- Over 8 to 12, incl., over 200 to 300; UNS C17200 155–190 (1070–1310) 130 (890) 3 34–
tion hard-
ened (AT)
Over 12 over 300 145–180 (1000–1240) 125 (860) 3 34–
TABLE 3 Mechanical Properties After Precipitation Heat Treatment
Temper Designation
Yield Strength,
Diameter or Thickness
Copper Alloy Tensile Strength, Elongation in Rockwell C
Code Name ksi (MPa),
A B, C D
UNS No. ksi (MPa) 4×D, min, % Scale, min
in. mm
0.2 % Offset, min
TF00 precipita- all sizes all sizes UNS C17000 150–190 (1030–1310) 120 (820) 3 32
tio
...