ASTM B888/B888M-19

Standard Specification for Copper Alloy Strip for Use in Manufacture of Electrical Connectors or Spring Contacts

ABSTRACT
This specification establishes the requirements for copper alloy strips for use in the manufacture of electrical connectors or spring contacts produced from one of the following Copper Alloy UNS Nos.: C14530, C15100, C15500, C17000, C17200, C17410, C17450, C17460, C17500, C17510, C19010, C19025, C19210, C19400, C19500, C19700, C23000, C26000, C40810, C40850, C40860, C42200, C42500, C42520, C42600, C50580, C50780, C51000, C51080, C51100, C51180, C51980, C52100, C52180, C52480, C63800, C65400, C68800, C70250, C70260, C70265, C75200, and C76200. The material for manufacture shall be a cast bar, slab, cake, billet, or other form of such composition as to be suitable for processing by either hot- or cold-working to produce the products prescribed in this specification. Products shall be finished by hot working, cold working, annealing, or heat treatment as may be necessary to meet mechanical property requirements, which include tensile strength, yield strength, and elongation. Tempers shall be available in the annealed, rolled, or mill hardened conditions. Products shall also adhere to tolerances as to dimension such as thickness, width, length, straightness, and mass.
SCOPE
1.1 This specification establishes the requirements for copper alloy strip for use in the manufacture of electrical connectors or spring contacts produced from one of the following Copper Alloy UNS Nos.:2 C14530, C15100, C15500, C17000, C17200, C17410, C17450, C17460, C17500, C17510, C19002, C19010, C19015, C19025, C19210, C19400, C19500, C19700, C23000, C26000, C40810, C40850, C40860, C42200, C42500, C42520, C42600, C50580, C50780, C51000, C51080, C51100, C51180, C51980, C52100, C52180, C52480, C63800, C64725, C65400, C68800, C70250, C70260, C70265, C70310, C70350, C75200, and C76200.  
1.2 The requirements for the other copper alloys such as copper-nickel-tin spinodal, UNS C72650, C72700, and C72900, shall be as prescribed in the current edition of Specification B740.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
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-2019
• ICS: 29.050 - Superconductivity and conducting materials
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.01 - Plate, Sheet, and Strip

Relations

• Replaces: ASTM B888/B888M-17 - Standard Specification for Copper Alloy Strip for Use in Manufacture of Electrical Connectors or Spring Contacts
• Effective Date: 01-Oct-2019
• Refers: ASTM E8/E8M-24 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Jan-2024
• Refers: ASTM B820-23 - Standard Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip
• Effective Date: 01-Nov-2023
• Refers: ASTM B846-19a - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Aug-2019
• Refers: ASTM B846-19 - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Jan-2019
• Refers: ASTM B601-18a - Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
• Effective Date: 01-Oct-2018
• Refers: ASTM B820-18 - Standard Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip
• Effective Date: 01-Mar-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 B601-16 - Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
• Effective Date: 01-Oct-2016
• Refers: ASTM E8/E8M-16 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 15-Jul-2016
• Refers: ASTM B193-16 - Standard Test Method for Resistivity of Electrical Conductor Materials
• Effective Date: 01-Apr-2016
• Refers: ASTM E8/E8M-15 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Feb-2015
• Refers: ASTM B820-14a - Standard Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip
• Effective Date: 01-Sep-2014
• Refers: ASTM B193-02(2014) - Standard Test Method for Resistivity of Electrical Conductor Materials
• Effective Date: 01-Apr-2014
• Refers: ASTM B820-14 - Standard Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip
• Effective Date: 01-Apr-2014

Overview

ASTM B888/B888M-19: Standard Specification for Copper Alloy Strip for Use in Manufacture of Electrical Connectors or Spring Contacts provides comprehensive requirements for copper alloy strip material used in electrical connectors and spring contact applications. Developed by ASTM International, this standard ensures that copper alloy strips meet stringent quality, mechanical, chemical, and dimensional criteria to guarantee reliable electrical performance and manufacturability. The standard applies to a wide range of copper alloys identified by specific UNS numbers-ensuring consistency and quality across different product applications.

Key Topics

• Scope and Applicability: Defines the use of copper alloy strip in the production of electrical connectors and spring contacts, specifying applicable UNS copper alloys.
• Material Requirements: Details allowed forms for starting materials (cast bar, slab, cake, billet, etc.) and permits both hot- and cold-working processes, including finishing steps like annealing or heat treatment.
• Mechanical Properties: Requires products to meet specified tensile strength, yield strength, and elongation values for various tempers and alloys.
• Chemical Composition: Mandates conformance with alloy-specific chemical requirements and addresses analysis and reporting methods.
• Dimensional Tolerances: Specifies acceptable variations in thickness, width, length, and straightness, referencing ASTM B248 for additional details.
• Tempers: Covers a range of tempers such as annealed, rolled, and mill hardened conditions, ensuring products meet the necessary mechanical and forming characteristics.
• Testing and Inspection: Outlines procedures for sampling, specimen preparation, testing (tensile, yield, elongation), and retesting if necessary.

Applications

Copper alloy strips compliant with ASTM B888/B888M-19 are used across a wide variety of electrical and electronic industries:

• Electrical Connectors: Ensures high conductivity and mechanical strength, critical for reliable electrical connections in automotive, telecommunications, and industrial control systems.
• Spring Contacts: Provides consistent elasticity and fatigue resistance, crucial for repeated mating cycles in electronic devices.
• Precision Components: Utilized where stable mechanical and electrical properties are essential, such as sensors, relay parts, switching devices, and PCB connectors.
• Custom Manufacturing: Allows for specification of edge types, dimensions, coil configurations (traverse or pancake wound), marking requirements, and packaging suitable for automated processing and high-volume assembly.

Using ASTM B888/B888M-19 helps manufacturers, engineers, and product designers achieve:

• Consistency in material performance and quality;
• International suitability, as its development aligns with WTO Technical Barriers to Trade (TBT) principles;
• Reliable product traceability through required marking and documentation practices;
• Simplified procurement and specification processes based on recognized UNS alloy numbers and performance criteria.

Related Standards

For best practice and compliance, the following related ASTM and ISO standards should be referenced alongside B888/B888M-19:

• ASTM B248 / B248M: General requirements for wrought copper and copper-alloy plate, sheet, strip, and rolled bar-fundamental for dimensions and tolerances.
• ASTM B601: Classification for temper designations of copper and copper alloys.
• ASTM B740: For copper-nickel-tin spinodal alloy strip requirements.
• ASTM B820: Bend test method for evaluating formability.
• ASTM B846: Terminology reference for copper and copper alloys.
• ASTM E8/E8M: Methods for tension testing of metallic materials.
• ISO 4744 and ISO 7602: Methods for chemical analysis of copper alloys.

Practical Value

Adherence to ASTM B888/B888M-19 ensures electrical connector and spring contact manufacturers use copper alloy strip materials that meet global expectations for performance, quality, and process efficiency. By referencing this standard, stakeholders in the electrical and electronics sectors can achieve enhanced product safety, international supply chain compatibility, and greater confidence in end-use reliability.

Keywords: ASTM B888/B888M-19, copper alloy strip, electrical connectors, spring contacts, UNS copper alloy, mechanical properties, dimensional tolerances, temper, quality control, standard specification.

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:B888/B888M −19
Standard Specification for
Copper Alloy Strip for Use in Manufacture of Electrical
Connectors or Spring Contacts
This standard is issued under the fixed designation B888/B888M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification establishes the requirements for cop-
per alloy strip for use in the manufacture of electrical connec- B193Test Method for Resistivity of Electrical Conductor
Materials
tors or spring contacts produced from one of the following
CopperAlloy UNS Nos.: C14530, C15100, C15500, C17000, B248Specification for General Requirements for Wrought
Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled
C17200, C17410, C17450, C17460, C17500, C17510,
C19002, C19010, C19015, C19025, C19210, C19400, Bar
B248MSpecificationforGeneralRequirementsforWrought
C19500, C19700, C23000, C26000, C40810, C40850,
C40860, C42200, C42500, C42520, C42600, C50580, Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled
Bar (Metric)
C50780,C51000,C51080,C51100,C51180,C51980,C52100,
C52180, C52480, C63800, C64725, C65400, C68800, B601ClassificationforTemperDesignationsforCopperand
Copper Alloys—Wrought and Cast
C70250, C70260, C70265, C70310, C70350, C75200, and
C76200. B740Specification for Copper-Nickel-Tin Spinodal Alloy
Strip
1.2 The requirements for the other copper alloys such as
B820Test Method for BendTest for Determining the Form-
copper-nickel-tin spinodal, UNS C72650, C72700, and
ability of Copper and Copper Alloy Strip
C72900, shall be as prescribed in the current edition of
B846Terminology for Copper and Copper Alloys
Specification B740.
E8/E8MTest Methods for Tension Testing of Metallic Ma-
1.3 The values stated in either SI units or inch-pound units
terials
are to be regarded separately as standard. The values stated in
E54Test Methods for ChemicalAnalysis of Special Brasses
eachsystemarenotnecessarilyexactequivalents;therefore,to
and Bronzes (Withdrawn 2002)
ensure conformance with the standard, each system shall be
E62Test Methods for Chemical Analysis of Copper and
used independently of the other, and values from the two
CopperAlloys(PhotometricMethods)(Withdrawn2010)
systems shall not be combined.
E75Test Methods for Chemical Analysis of Copper-Nickel
and Copper-Nickel-Zinc Alloys (Withdrawn 2010)
1.4 This international standard was developed in accor-
E478Test Methods for ChemicalAnalysis of CopperAlloys
dance with internationally recognized principles on standard-
E527Practice for Numbering Metals and Alloys in the
ization established in the Decision on Principles for the
Unified Numbering System (UNS)
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 2.2 ISO Standards:
Barriers to Trade (TBT) Committee. ISO 4744Copper and Copper Alloys—Determination of
Chromium Content—Flame Atomic Absorption Spectro-
metric Method
This specification is under the jurisdiction of Committee B05 on Copper and
Copper Alloys and is the direct responsibility of Subcommittee B05.01 on Plate,
Sheet, and Strip. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2019. Published October 2019. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1998. Last previous edition approved in 2017 as B888/B888M–17. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/B0888_B0888M–19. the ASTM website.
2 4
The UNS system for copper and copper alloys (see Practice E527) is a simple The last approved version of this historical standard is referenced on
expansion of the former standard designation system accomplished by the addition www.astm.org.
of a prefix “c” and a suffix “00.” The suffix can be used to accommodate Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
composition variations of the base alloy. 4th Floor, New York, NY 10036, http://www.ansi.org.
*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
B888/B888M−19
ISO 7602Copper and Copper Alloys—Determination of 6.2.3 Identification marking (Section 22);
Tellurium Content
6.2.4 Certification (Section 20);
6.2.5 Mill test report (Section 21); and
3. Terminology
6.2.6 How packaged: coil wound in traverse or pancake
3.1 Definitions—For definition of terms used in this
style (Section 22).
specification, refer to Terminology B846.
6.2.6.1 Number of strip lengths per coil,
4. General Requirements
6.2.6.2 Size and weight of each coil, and
4.1 ForproductfurnishedunderthisspecificationinEnglish 6.2.7 The electrical resistivity or any other physical and
units, the following sections of Specification B248 must electrical properties (See Table X1.1).
constitute a part of this specification. For product furnished
under this specification in the SI units, the following sections
7. Materials and Manufacture
of Specification B248M must constitute a part of this specifi-
7.1 Material—The material of manufacture shall be a cast
cation.
bar,slab,cake,billet,orotherformofthecompositiongivenin
4.1.1 Terminology;
Table 1 for the specified alloy, suitable for processing into the
4.1.2 Materials and Manufacture;
product prescribed in this specification.
4.1.3 Dimensions, Weights, and Permissible Variations;
4.1.4 Workmanship, Finish, and Appearance;
7.2 Manufacture—The product shall be produced by either
4.1.5 Sampling;
hot- or cold-working operation. It shall be finished, unless
4.1.6 Number of Tests and Retests;
otherwise specified, by such hot working, cold working,
4.1.7 Specimen Preparation;
annealing, or heat treatment as may be necessary to meet the
4.1.8 Test Methods;
properties specified in Table 2.
4.1.9 Significance of Numerical Limits;
7.3 Edges—The edges shall be slit or rolled edges as
4.1.10 Certification;
specified by the buyer. Slit edges shall be furnished unless
4.1.11 Test Reports; and
otherwise specified or agreed upon between the purchaser and
4.1.12 Packaging and Package Marking.
supplier or manufacturer.
4.2 In the event of a conflict between this specification and
Specification B248 or B248M, the requirements of this speci-
8. Chemical Composition
fication shall take precedence.
8.1 The materials shall conform to the chemical composi-
5. Classification
tional requirements in Table 1 for the corresponding Copper
Alloy UNS Number designation specified in the ordering
5.1 Product produced to this specification is classified as
strip material to be used for spring contact or electrical and information.
electronic connector applications only.
8.2 These composition limits do not preclude the presence
of other elements. Limits for unnamed elements may be
6. Ordering Information
establishedandanalysisrequiredbyagreementbetweenmanu-
6.1 Contract or purchase orders for product under this
facturer or supplier and purchaser when required.
specification should include the following information:
6.1.1 ASTM designation and year of issue;
8.3 Copper, when given as the remainder, is determined as
6.1.2 UNS alloy designation; the difference between the sum of results for all elements
6.1.3 Dimensions, for example, thickness, width;
determined and 100%.
6.1.4 Quantity; and
8.4 Zinc, when given as the remainder, is determined as the
6.1.5 Temper (Section 8).
difference between the sum of results for all elements deter-
6.2 The following options are available under this specifi-
mined and 100%.
cation and shall be specified in the contract or purchase order
8.4.1 For those copper alloys in which zinc is given as the
when required:
remainder, copper may be determined by difference; however,
6.2.1 Type of edge: slit, sheared, sawed, square corners,
when so determined, the result shall conform to the limits
rounded corners, rounded edges, or full-rounded edges (Sec-
prescribed in Table 1.
tion 11);
8.5 When a chemical analysis is performed as specified in
6.2.2 Width and straightness tolerances, slit-metal
tolerances, square-sheared metal tolerances, sawed metal the ordering information, for the Copper Alloy UNS No. in
Table1,copperplusthesumofthenamedelementsshallbeas
tolerances, straightened or edge-rolled metal tolerances (Sec-
tion 11); specified in the appropriate table footnote.
B888/B888M−19
TABLE 1 Chemical Requirements
Elements Composition, %
Copper
Alloy Alum Beryll Magnes- Man- Phos- Chro- Zirco- Tellur
UNS No. Copper -inum -ium Cobalt Iron Lead ium ganese Nickel phorus Tin Zinc mium nium Silicon Silver -ium Other
A
C14530 99.90 . . . . . . . . 0.001– 0.003– . . . . . 0.003– .
B
min
0.010 0.023 0.023
C D
C15100 99.80 . . . . . . . . . . . . 0.05– . . . .
min
0.15
D
C15500 99.75 . . . . . 0.08– . . 0.040– . . . . . 0.027– . .
min
0.13 0.080 0.10
E D F
C17000 remainder 0.20 1.60– 0.20 . . . . . . . . . . 0.20 . . .
min
max 1.85 max
E D F
C17200 remainder 0.20 1.80– 0.20 . . . . . . . . . . 0.20 . . .
min
max 2.00 max
E D
C17410 remainder 0.20 0.15– 0.35– 0.20 . . . . . . . . . 0.20 . . .
max 0.50 0.6 max
max
E D
C17450 remainder 0.20 0.15– . 0.20 . . . 0.50– . 0.25 . . 0.50 % 0.20 . . .
max 0.50 max 1.0 max max max
E D
C17460 remainder 0.20 0.15– . 0.20 . . . 1.0– . 0.25 . . 0.50 % 0.20 . . .
max 0.50 max 1.4 max max
max
E D
C17500 remainder 0.20 0.4– 2.4– 0.10 . . . . . . . . . 0.20 . . .
max 0.7 2.7
max max
E D
C17510 remainder 0.20 0.2– 0.3 0.10 . . . 1.4– . . . . . 0.20 . . .
max 0.6 2.2 max
max max
E D
C19002 remainder . . . 0.10 0.05 0.01 . 1.4– 0.05 0.02– 0.04– . 0.005– 0.20– 0.02– . .
G
1.7 0.30 0.35 0.05 0.35 0.50
E D
C19010 remainder . . . . . . . 0.8– 0.01– . . . . 0.15– . . .
1.8 0.05 0.35
H D
C19015 remainder . . . . . 0.02– . 0.50– 0.02– . . . . 0.10– . . .
0.15 2.4 0.20 0.40
I D
C19025 remainder . . . 0.10 . . . 0.8– 0.03– 0.7– 0.20 . . . . . .
1.2 0.07 1.1 max
max
H
C19210 remainder . . . 0.05– . . . . 0.025– . . . . . . . .
0.15 0.04
H
C19400 97.0 min . . . 2.1– 0.03 . . . 0.015– . 0.05– . . . . . .
2.6 max 0.15 0.20
H
C19500 96.0 min 0.02 . 0.30– 1.0– 0.02 . . . 0.01– 0.10– 0.20 . . . . . .
max 1.3 2.0 max 0.35 1.0 max
H
C19700 remainder . . 0.05 0.30– 0.05 0.01– 0.05 0.05 0.10– 0.20 0.20 . . . . . .
1.2 max 0.20 max 0.40 max max
max max
H
C23000 84.0-86.0 . . . 0.05 0.05 . . . . . remainder . . . . . .
max
max
I
C26000 68.5-71.5 . . . 0.05 0.07 . . . . . remainder . . . . . .
max max
I
C40810 94.5-96.5 . . . 0.08– 0.05 . . 0.11– 0.028– 1.8– remainder . . . . . .
0.12 max 0.20 0.04 2.2
I
C40850 94.5-96.5 . . . 0.05– 0.05 . . 0.05– 0.01– 2.6– remainder . . . . . .
0.20 max 0.20 0.20 4.0
B888/B888M−19
TABLE1 Continued
Elements Composition, %
Copper
Alloy Alum Beryll Magnes- Man- Phos- Chro- Zirco- Tellur
UNS No. Copper -inum -ium Cobalt Iron Lead ium ganese Nickel phorus Tin Zinc mium nium Silicon Silver -ium Other
I
C40860 94.0-96.0 . . . 0.01– 0.05 . . 0.05– 0.02– 1.7– remainder . . . . . .
0.05 max 0.20 0.04 2.3
I
C42200 86.0-89.0 . . . 0.05 0.05 . . . 0.35 0.8– remainder . . . . . .
max max max 1.4
I
C42500 87.0-90.0 . . . 0.05 0.05 . . . 0.35 1.5– remainder . . . . . .
max max max 3.0
I
C42520 88.0-91.0 . . . 0.05– 0.05 . . 0.05– 0.01– 1.5– remainder . . . . . .
0.20 max 0.20 0.20 3.0
I D
C42600 87.0-90.0 . . . 0.05– 0.05 . . 0.05– 0.01– 2.5– remainder . . . . . .
G
0.20 max 0.20 0.20 4.0
E
C50580 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 1.0– 0.30 . . . . . .
0.20 max 0.20 0.35 1.7 max
E
C50780 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 1.7– 0.30 . . . . . .
0.20 max 0.20 0.35 2.3 max
E
C51000 remainder . . . 0.10 0.05 . . . 0.03– 4.2– 0.30 . . . . . .
max max 0.35 5.8 max
E
C51080 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 4.8– 0.30 . . . . . .
0.20 max 0.20 0.35 5.8 max
E
C51100 remainder . . . 0.10 0.05 . . . 0.03– 3.5– 0.30 . . . . . .
max max 0.35 4.9 max
E
C51180 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 3.5– 0.30 . . . . . .
0.20 max 0.20 0.35 4.9 max
E
C51980 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 5.5– 0.30 . . . . . .
0.20 max 0.20 0.35 7.0 max
E
C52100 remainder . . . 0.10 0.05 . . . 0.03– 7.0– 0.20 . . . . . .
max max 0.35 9.0 max
E
C52180 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 7.0– 0.30 . . . . . .
0.20 max 0.20 0.35 9.0 max
E
C52480 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 9.0– 0.30 . . . . . .
0.20 max 0.20 0.35 11.0 max
E D
C63800 remainder 2.5- . 0.25– 0.20 0.05 . 0.10 0.20 . . 0.8 . . 1.5– . . .
3.1 0.55 max max max max 2.1
max
E D
C64725 95.0 min . . . 0.25 0.01 0.20 . 1.3– . 0.20– 0.50– 0.09 . 0.20– . . 0.01
G
2.7 0.8 1.5 0.8 Calcium
E D
C65400 remainder . . . . 0.05 . . . . 1.2– 0.50 0.01– . 2.7– . . .
max 1.9 max 0.12 3.4
E D
C68800 remainder 3.0- . 0.25– 0.20 0.05 . . . . . 21.3– . . . . . .
J J
3.8 0.55 max max 24.1
E D
C70250 remainder . . . 0.20 0.05 0.05– 0.10 2.2– . . 1.0 . . 0.25– . . .
G
max max 0.30 max 4.2 max 1.2
E D
C70260 remainder . . . . . . . 1.0– 0.01 . . . . 0.20– . . .
G
3.0 max 0.7
E D
C70265 remainder . . . . 0.05 . . 1.0– 0.01 0.05– 0.30 . . 0.20– . . .
G
max 3.0 max 0.8 max 0.7
E D
C70310 remainder . . . 0.10 0.05 0.01 . 1.0– 0.05 1.0 2.0 . 0.005– 0.08– 0.02– . .
G
4.0 0.05 1.0 0.50
E D
C70350 remainder . . 1.0– 0.20 0.05 0.04 0.20 1.0– . . 1.0 max . . 0.50– . . .
2.0 max max max max 2.5 1.2
E D
C75200 63.0-66.5 . . . 0.25 0.05 . 0.50 16.5– . . remainder . . . . . .
G
max max max 19.5
B888/B888M−19
TABLE1 Continued
Elements Composition, %
Copper
Alloy Alum Beryll Magnes- Man- Phos- Chro- Zirco- Tellur
UNS No. Copper -inum -ium Cobalt Iron Lead ium ganese Nickel phorus Tin Zinc mium nium Silicon Silver -ium Other
E D
C76200 57.0-61.0 . . . 0.25 0.09 . 0.50 11.0– . . remainder . . . . . .
G
max max max 13.5
A
Includes silver + tin + tellurium + selenium.
B
Tellurium or selenium, or both.
C
Copper + the sum of the named elements shall be 99.9 % min.
D
Copper value includes silver.
E
Copper + the sum of the named elements shall be 99.5 % min.
F
Nickel + cobalt, 0.20 % min; nickel + iron +cobalt, 0.6 % max.
G
Includes cobalt.
H
Copper + the sum of the named elements shall be 99.8 % min.
I
Copper + the sum of the named elements shall be 99.7 % min.
J
Aluminum + zinc = 25.1–27.1.
B888/B888M−19
TABLE 2 Mechanical Requirements
Yield Strength
Yield Strength
Temper Designation Tensile Strength, ksi Tensile Strength, MPa (0.2 % Offset), Elongation, %
(0.2 % Offset), ksi
MPa
Standard Former min max min max min min min
Copper Alloy UNS NO. C14530
H01 ⁄4 hard 35 45 240 310 26 180 7
H02 ⁄2 hard 40 50 275 345 33 230 5
H03 ⁄4 hard 44 54 305 370 39 270 3
H04 hard 47 57 325 395 43 295 2
H06 extra hard 50 60 345 415 47 325 1
H08 spring 54 64 370 440 51 350 1
H10 extra spring 58 . . . 400 . . . 56 385 . . .
Copper Alloy UNS NO. C15100
O61 annealed 37 42 255 290 9 60 35
H01 ⁄4 hard 40 45 275 310 26 180 11
H02 ⁄2 hard 43 51 295 350 35 240 4
H03 ⁄4 hard 47 56 325 385 45 310 2
H04 hard 53 62 365 425 51 350 2
H06 extra hard 59 65 405 450 57 395 1
H08 spring 64 71 440 490 62 425 1
Copper Alloy UNS NO. C15500
O61 annealed 34 43 235 295 15 105 30
H02 ⁄2 hard 45 55 310 380 38 260 13
H04 hard 56 64 385 440 50 345 6
H06 extra hard 63 72 435 495 56 385 5
H08 spring 65 73 450 505 60 415 4
H10 extra spring 68 75 470 515 63 435 3
Copper Alloy UNS NO. C17000
TB00 A 60 78 410 540 30 210 35
TD01 ⁄4 H 75 88 520 610 60 415 15
TD02 ⁄2 H 85 100 590 690 75 520 9
TD04 H 100 130 690 900 90 620 2
TF00 AT 150 180 1030 1240 130 900 3
TH01 ⁄4 HT 160 190 1100 1310 135 930 2.5
TH02 ⁄2 HT 170 200 1170 1380 145 1000 1
TH04 HT 180 210 1240 1450 155 1070 1
AM TM00 100 110 690 760 70 480 18
⁄4 HM TM01 110 120 760 830 80 550 15
⁄2 HM TM02 120 135 830 930 95 660 12
HM TM04 135 150 930 1030 110 760 9
SHM TM05 150 160 1030 1100 125 860 9
XHM TM06 155 175 1070 1210 135 930 3
Copper Alloy UNS NO. C17200
TB00 A 60 78 410 540 30 210 35
TD01 ⁄4 H 75 88 520 610 60 415 20
TD02 ⁄2 H 85 100 590 690 75 520 12
TD04 H 100 130 690 900 90 620 2
TF00 AT 165 195 1140 1340 140 970 4
TH01 ⁄4 HT 175 205 1210 1410 150 1030 3
TH02 ⁄2 HT 185 215 1280 1480 160 1100 2
TH04 HT 190 220 1310 1520 165 1140 1
AM TM00 100 110 690 760 70 480 16
⁄4 HM TM01 110 120 760 830 80 550 15
⁄2 HM TM02 120 135 830 930 95 660 12
HM TM04 135 150 930 1030 110 760 9
SHM TM05 150 160 1030 1100 125 860 9
XHM TM06 155 175 1070 1210 135 930 4
XHMS TM08 175 190 1210 1310 150 1030 3
Copper Alloy UNS NO. C17410
TH02 ⁄2 HT 95 115 665 790 80 550 10
TH04 HT 110 130 760 895 100 690 7
Copper Alloy UNS NO. C17450
TH02 ⁄2 HT 95 115 655 790 80 550 12
Copper Alloy UNS NO. C17460
TH03 ⁄4 HT 115 135 790 930 95 655 11
TH04 HT 120 140 825 965 105 720 10
Copper Alloy UNS NO. C17500
TB00 A 35 55 240 380 25 170 20
TD04 H 70 85 480 585 55 380 3
TF00 AT 100 120 690 830 80 550 10
TH04 HT 110 130 760 900 95 655 8
HTR 120 150 830 1030 110 760 1
HTC 75 85 512 590 50 340 8
Copper Alloy UNS NO. C17510
TB00 A 35 55 240 380 25 170 20
TD04 H 70 85 480 585 55 380 2
B888/B888M−19
TABLE2 Continued
Yield Strength
Yield Strength
Temper Designation Tensile Strength, ksi Tensile Strength, MPa (0.2 % Offset), Elongation, %
(0.2 % Offset), ksi
MPa
Standard Former min max min max min min min
TF00 AT 100 120 690 830 80 550 10
TH04 HT 110 140 760 965 95 655 8
Copper Alloy UNS No. C19002
TM04 HM 72 87 495 600 65 450 10
TM06 XHM 84 94 580 650 78 540 7
TM08 XHMS 89 101 615 695 82 565 5
TM05 SHM 84 94 580 650 75 515 8
Copper Alloy UNS NO. C19010
TM03 ⁄4 HM 67 77 460 520 50 340 12
TM04 HM 71 81 490 560 60 410 10
TM06 XHM 75 86 520 590 64 440 8
TM08 SHM 84 . . . 580 . . . 74 510 6
H01 ⁄4 hard 52 64 360 430 40 275 8
H02 ⁄2 hard 60 70 410 470 54 370 7
H03 ⁄4 hard 67 77 460 520 62 410 5
H04 hard 71 81 490 560 66 435 4
H06 extra hard 75 86 520 590 72 460 3
H08 spring 84 95 580 655 78 520 2
H10 extra spring 95 . . . 655 . . . 85 585 1
Copper Alloy UNS NO. C19015
H020 ⁄2 Hard 53 64 365 440 38 260 7
H040 Hard 60 71 415 490 54 370 5
H060 Extra hard 66 75 455 515 64 440 2
TM02 ⁄2 HM 70 81 485 485 55 380 10
TM04 HM 64 86 440 595 64 440 8
Copper Alloy UNS NO. C19025
HR01 ⁄4 hard 49 68 340 470 42 290 15
HR02 ⁄2 hard 63 76 435 525 58 400 9
HR04 hard 72 83 495 570 68 470 5
HR06 extra hard 78 89 540 615 74 510 4
HR08 spring 84 95 580 655 81 560 . . .
HR10 extra spring 91 106 625 730 88 605 . . .
Copper Alloy UNS NO. 19210
O61 annealed 27 42 190 290 16 110 30
H01 ⁄4 hard 43 53 300 365 20 135 20
H02 ⁄2 hard 47 60 325 410 44 310 5
H03 ⁄4 hard 52 62 355 425 50 345 4
H04 full hard 56 66 385 455 54 355 3
H06 extra hard 60 70 410 480 58 400 2
H08 spring hard 64 74 440 510 62 425 1
H10 extra spring 66 . . . 455 . . . 64 440 1
Copper Alloy UNS NO. C19400
O61 annealed 40 63 275 435 16 110 10
H02 ⁄2 hard 53 63 365 435 36 250 6
H04 full hard 60 70 415 485 53 365 3
H06 extra hard 67 73 460 505 64 440 2
H08 spring hard 70 76 485 525 67 460 2
H10 extra spring 73 80 505 550 70 485 1
Copper Alloy UNS NO. C19500
O61 annealed 50 60 345 415 21 145 22
H01 ⁄4 hard 60 72 415 495 45 310 5
H02 ⁄2 hard 68 78 470 540 66 455 3
H03 ⁄4 hard 75 85 515 585 72 495 2
H04 full hard 82 90 565 620 79 545 2
H08 spring 88 97 605 670 85 585 1
Copper Alloy UNS NO. C19700
O61 annealed 43 53 295 365 16 110 20
H02 ⁄2 hard 53 63 365 435 36 250 6
H04 full hard 60 70 415 485 53 365 2
H06 extra hard 67 73 460 505 64 440 2
H08 spring hard 70 76 485 525 67 460 2
H10 extra spring 73 80 505 550 70 485 1
Copper Alloy UNS NO. C23000
O61 annealed 39 47 270 325 8 55 43
H01 ⁄4 hard 44 54 305 370 23 160 15
H02 ⁄2 hard 51 61 350 420 43 295 8
H03 ⁄4 hard 57 67 395 460 51 350 4
H04 hard 63 72 435 495 57 395 4
H06 extra hard 72 80 495 550 65 450 3
H08 spring 78 86 540 595 69 475 3
H10 extra spring 82 90 565 620 73 505 2
B888/B888M−19
TABLE2 Continued
Yield Strength
Yield Strength
Temper Designation Tensile Strength, ksi Tensile Strength, MPa (0.2 % Offset), Elongation, %
(0.2 % Offset), ksi
MPa
Standard Former min max min max min min min
Copper Alloy UNS NO. C26000
O61 annealed 45 61 310 420 10 70 40
H01 ⁄4 hard 49 59 340 405 21 145 34
H02 ⁄2 hard 57 67 395 460 42 290 19
H03 ⁄4 hard 64 74 440 510 44 300 8
H04 hard 71 81 490 560 64 440 6
H06 extra hard 83 92 570 635 76 525 2
H08 spring 91 100 625 690 80 550 1
H10 extra spring 95 104 655 715 83 570 1
Copper Alloy UNS NO. C40810
H02 ⁄2 hard 57 73 395 505 41 285 20
H04 hard 75 87 515 600 68 470 8
H06 extra hard 88 97 605 670 84 580 6
H08 spring 92 100 635 690 88 605 4
Copper Alloy UNS NO. C40850
H02 ⁄2 hard 57 73 395 505 41 285 20
H04 hard 75 87 515 600 68 470 8
H06 extra hard 88 97 605 670 84 580 6
H08 spring 92 104 635 715 90 620 4
Copper Alloy UNS NO. C40860
H02 ⁄2 hard 56 72 385 495 40 275 20
H04 hard 73 86 505 595 66 455 8
H06 extra hard 86 96 595 660 84 580 6
H08 spring 90 103 620 710 88 605 4
Copper Alloy UNS NO. C42200
O61 annealed 41 49 285 340 12 85 43
H01 ⁄4 hard 47 57 325 395 21 145 17
H02 ⁄2 hard 54 65 370 450 48 330 6
H03 ⁄4 hard 60 72 415 495 58 400 4
H04 hard 67 79 460 545 67 460 3
H06 extra hard 75 85 515 585 72 495 2
H08 spring 82 92 565 635 77 530 2
H10 extra spring 88 . . . 605 . . . 82 565 1
Copper Alloy UNS NO. C42500
O61 annealed 41 47 285 325 13 90 47
H01 ⁄4 hard 49 59 340 405 20 140 24
H02 ⁄2 hard 57 69 395 4
...

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: B888/B888M − 17 B888/B888M − 19
Standard Specification for
Copper Alloy Strip for Use in Manufacture of Electrical
Connectors or Spring Contacts
This standard is issued under the fixed designation B888/B888M; 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 alloy strip for use in the manufacture of electrical connectors or
spring contacts produced from one of the following Copper Alloy UNS Nos.Nos.: : C14530, C14530, C15100, C15500, C17000,
C17200, C17410, C17450, C17460, C17500, C17510, C19002, C19010, C19015, C19025, C19210, C19400, C19500, C19700,
C23000, C26000, C40810, C40850, C40860, C42200, C42500, C42520, C42600, C50580, C50780, C51000, C51080, C51100,
C51180, C51980, C52100, C52180, C52480, C63800, C64725, C65400, C68800, C70250, C70260, C70265, C70310, C70350,
C75200, and C76200.
1.2 The requirements for the other copper alloys such as copper-nickel-tin spinodal, UNS C72650, C72700, and C72900, shall
be as prescribed in the current edition of Specification B740.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system mayare not benecessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other. Combiningother, and values from the two systems may result in non-conformance with the
standard.shall not be combined.
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
2.1 ASTM Standards:
B193 Test Method for Resistivity of Electrical Conductor Materials
B248 Specification for General Requirements for Wrought Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled Bar
B248M Specification for General Requirements for Wrought Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled Bar
(Metric)
B601 Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
B740 Specification for Copper-Nickel-Tin Spinodal Alloy Strip
B820 Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip
B846 Terminology for Copper and Copper Alloys
E8/E8M Test Methods for Tension Testing of Metallic Materials
E54 Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Withdrawn 2010)
E75 Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys (Withdrawn 2010)
E478 Test Methods for Chemical Analysis of Copper Alloys
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
This specification is under the jurisdiction of Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.01 on Plate, Sheet, and
Strip.
Current edition approved April 1, 2017Oct. 1, 2019. Published April 2017October 2019. Originally approved in 1998. Last previous edition approved in 20132017 as
B888/B888M-13.–17. DOI: 10.1520/B0888_B0888M-17.10.1520/B0888_B0888M–19.
The UNS system for copper and copper alloys (see Practice E527) is a simple expansion of the former standard designation system accomplished by the addition of a
prefix “c” and a suffix “00.” The suffix can be used to accommodate composition variations of the base alloy.
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.
The last approved version of this historical standard is referenced on www.astm.org.
*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
B888/B888M − 19
2.2 ISO Standards:
ISO 4744 Copper and Copper Alloys—Determination of Chromium Content—Flame Atomic Absorption Spectrometric Method
ISO 7602 Copper and Copper Alloys—Determination of Tellurium Content
3. Terminology
3.1 Definitions—For definition of terms used in this specification, refer to Terminology B846.
4. General Requirements
4.1 For product furnished under this specification in English units, the following sections of Specification B248 must constitute
a part of this specification. For product furnished under this specification in the SI units, the following sections of Specification
B248M must constitute a part of this specification.
4.1.1 Terminology,Terminology;
4.1.2 Materials and Manufacture,Manufacture;
4.1.3 Dimensions, Weights, and Permissible Variations,Variations;
4.1.4 Workmanship, Finish, and Appearance,Appearance;
4.1.5 Sampling,Sampling;
4.1.6 Number of Tests and Retests,Retests;
4.1.7 Specimen Preparation,Preparation;
4.1.8 Test Methods,Methods;
4.1.9 Significance of Numerical Limits,Limits;
4.1.10 Certification,Certification;
4.1.11 Test Reports,Reports; and
4.1.12 Packaging and Package Marking.
4.2 In the event of a conflict between this specification and Specification B248 or B248M, the requirements of this specification
shall take precedence.
5. Classification
5.1 Product produced to this specification is classified as strip material to be used for spring contact or electrical and electronic
connector applications only.
6. Ordering Information
6.1 Contract or purchase orders for product under this specification should include the following information:
6.1.1 ASTM designation and year of issue,issue;
6.1.2 UNS alloy designation,designation;
6.1.3 Dimensions, for example, thickness, width,width;
6.1.4 Quantity,Quantity; and
6.1.5 Temper (Section 8).
6.2 The following options are available under this specification and shall be specified in the contract or purchase order when
required:
6.2.1 Type of edge: slit, sheared, sawed, square corners, rounded corners, rounded edges, or full-rounded edges (Section 11),);
6.2.2 Width and straightness tolerances, slit-metal tolerances, square-sheared metal tolerances, sawed metal tolerances,
straightened or edge-rolled metal tolerances (Section 11),);
6.2.3 Identification marking (Section 22),);
6.2.4 Certification (Section 20),);
6.2.5 Mill test report (Section 21),); and
6.2.6 How packaged: coil wound in traverse or pancake style (Section 22).
6.2.6.1 Number of strip lengths per coil,
6.2.6.2 Size and weight of each coil, and
6.2.7 The electrical resistivity or any other physical and electrical properties (See Table X1.1).
7. Materials and Manufacture
7.1 Material—The material of manufacture shall be a cast bar, slab, cake, billet, or other form of the composition given in Table
1 for the specified alloy, suitable for processing into the product prescribed in this specification.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
B888/B888M − 19
TABLE 1 Chemical Requirements
Elements Composition, %
Copper
Alloy Alum Beryll Magnes- Man- Phos- Chro- Zirco- Tellur
UNS No. Copper -inum -ium Cobalt Iron Lead ium ganese Nickel phorus Tin Zinc mium nium Silicon Silver -ium Other
A
C14530 99.90 . . . . . . . . 0.001– 0.003– . . . . . 0.003– .
B
min
0.010 0.023 0.023
C D
C15100 99.80 . . . . . . . . . . . . 0.05– . . . .
min
0.15
D
C15500 99.75 . . . . . 0.08– . . 0.040– . . . . . 0.027– . .
min
0.13 0.080 0.10
E D F
C17000 remainder 0.20 1.60– 0.20 . . . . . . . . . . 0.20 . . .
min
max 1.85 max
E D F
C17200 remainder 0.20 1.80– 0.20 . . . . . . . . . . 0.20 . . .
min
max 2.00 max
E D
C17410 remainder 0.20 0.15– 0.35– 0.20 . . . . . . . . . 0.20 . . .
max 0.50 0.6 max
max
E D
C17450 remainder 0.20 0.15– . 0.20 . . . 0.50– . 0.25 . . 0.50 % 0.20 . . .
max 0.50 max 1.0 max max max
E D
C17460 remainder 0.20 0.15– . 0.20 . . . 1.0– . 0.25 . . 0.50 % 0.20 . . .
max 0.50 max 1.4 max max
max
E D
C17500 remainder 0.20 0.4– 2.4– 0.10 . . . . . . . . . 0.20 . . .
max 0.7 2.7
max max
E D
C17510 remainder 0.20 0.2– 0.3 0.10 . . . 1.4– . . . . . 0.20 . . .
max 0.6 2.2 max
max max
E D
C19002 remainder . . . 0.10 0.05 0.01 . 1.4– 0.05 0.02– 0.04– . 0.005– 0.20– 0.02– . .
G
1.7 0.30 0.35 0.05 0.35 0.50
E D
C19010 remainder . . . . . . . 0.8– 0.01– . . . . 0.15– . . .
1.8 0.05 0.35
H D
C19015 remainder . . . . . 0.02– . 0.50– 0.02– . . . . 0.10– . . .
0.15 2.4 0.20 0.40
I D
C19025 remainder . . . 0.10 . . . 0.8– 0.03– 0.7– 0.20 . . . . . .
1.2 0.07 1.1 max
max
H
C19210 remainder . . . 0.05– . . . . 0.025– . . . . . . . .
0.15 0.04
H
C19400 97.0 min . . . 2.1– 0.03 . . . 0.015– . 0.05– . . . . . .
2.6 max 0.15 0.20
H
C19500 96.0 min 0.02 . 0.30– 1.0– 0.02 . . . 0.01– 0.10– 0.20 . . . . . .
max 1.3 2.0 max 0.35 1.0 max
H
C19700 remainder . . 0.05 0.30– 0.05 0.01– 0.05 0.05 0.10– 0.20 0.20 . . . . . .
1.2 max 0.20 max 0.40 max max
max max
H
C23000 84.0-86.0 . . . 0.05 0.05 . . . . . remainder . . . . . .
max
max
I
C26000 68.5-71.5 . . . 0.05 0.07 . . . . . remainder . . . . . .
max max
I
C40810 94.5-96.5 . . . 0.08– 0.05 . . 0.11– 0.028– 1.8– remainder . . . . . .
0.12 max 0.20 0.04 2.2
I
C40850 94.5-96.5 . . . 0.05– 0.05 . . 0.05– 0.01– 2.6– remainder . . . . . .
0.20 max 0.20 0.20 4.0
B888/B888M − 19
TABLE 1 Continued
Elements Composition, %
Copper
Alloy Alum Beryll Magnes- Man- Phos- Chro- Zirco- Tellur
UNS No. Copper -inum -ium Cobalt Iron Lead ium ganese Nickel phorus Tin Zinc mium nium Silicon Silver -ium Other
I
C40860 94.0-96.0 . . . 0.01– 0.05 . . 0.05– 0.02– 1.7– remainder . . . . . .
0.05 max 0.20 0.04 2.3
I
C42200 86.0-89.0 . . . 0.05 0.05 . . . 0.35 0.8– remainder . . . . . .
max max max 1.4
I
C42500 87.0-90.0 . . . 0.05 0.05 . . . 0.35 1.5– remainder . . . . . .
max max max 3.0
I
C42520 88.0-91.0 . . . 0.05– 0.05 . . 0.05– 0.01– 1.5– remainder . . . . . .
0.20 max 0.20 0.20 3.0
I D
C42600 87.0-90.0 . . . 0.05– 0.05 . . 0.05– 0.01– 2.5– remainder . . . . . .
G
0.20 max 0.20 0.20 4.0
E
C50580 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 1.0– 0.30 . . . . . .
0.20 max 0.20 0.35 1.7 max
E
C50780 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 1.7– 0.30 . . . . . .
0.20 max 0.20 0.35 2.3 max
E
C51000 remainder . . . 0.10 0.05 . . . 0.03– 4.2– 0.30 . . . . . .
max max 0.35 5.8 max
E
C51080 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 4.8– 0.30 . . . . . .
0.20 max 0.20 0.35 5.8 max
E
C51100 remainder . . . 0.10 0.05 . . . 0.03– 3.5– 0.30 . . . . . .
max max 0.35 4.9 max
E
C51180 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 3.5– 0.30 . . . . . .
0.20 max 0.20 0.35 4.9 max
E
C51980 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 5.5– 0.30 . . . . . .
0.20 max 0.20 0.35 7.0 max
E
C52100 remainder . . . 0.10 0.05 . . . 0.03– 7.0– 0.20 . . . . . .
max max 0.35 9.0 max
E
C52180 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 7.0– 0.30 . . . . . .
0.20 max 0.20 0.35 9.0 max
E
C52480 remainder . . . 0.05– 0.05 . . 0.05– 0.01– 9.0– 0.30 . . . . . .
0.20 max 0.20 0.35 11.0 max
E D
C63800 remainder 2.5- . 0.25– 0.20 0.05 . 0.10 0.20 . . 0.8 . . 1.5– . . .
3.1 0.55 max max max max 2.1
max
E D
C64725 95.0 min . . . 0.25 0.01 0.20 . 1.3– . 0.20– 0.50– 0.09 . 0.20– . . 0.01
G
2.7 0.8 1.5 0.8 Calcium
E D
C65400 remainder . . . . 0.05 . . . . 1.2– 0.50 0.01– . 2.7– . . .
max 1.9 max 0.12 3.4
E D
C68800 remainder 3.0- . 0.25– 0.20 0.05 . . . . . 21.3– . . . . . .
J J
3.8 0.55 max max 24.1
E D
C70250 remainder . . . 0.20 0.05 0.05– 0.10 2.2– . . 1.0 . . 0.25– . . .
G
max max 0.30 max 4.2 max 1.2
E D
C70260 remainder . . . . . . . 1.0– 0.01 . . . . 0.20– . . .
G
3.0 max 0.7
E D
C70265 remainder . . . . 0.05 . . 1.0– 0.01 0.05– 0.30 . . 0.20– . . .
G
max 3.0 max 0.8 max 0.7
E D
C70310 remainder . . . 0.10 0.05 0.01 . 1.0– 0.05 1.0 2.0 . 0.005– 0.08– 0.02– . .
G
4.0 0.05 1.0 0.50
E D
C70350 remainder . . 1.0– 0.20 0.05 0.04 0.20 1.0– . . 1.0 max . . 0.50– . . .
2.0 max max max max 2.5 1.2
E D
C75200 63.0-66.5 . . . 0.25 0.05 . 0.50 16.5– . . remainder . . . . . .
G
max max max 19.5
B888/B888M − 19
TABLE 1 Continued
Elements Composition, %
Copper
Alloy Alum Beryll Magnes- Man- Phos- Chro- Zirco- Tellur
UNS No. Copper -inum -ium Cobalt Iron Lead ium ganese Nickel phorus Tin Zinc mium nium Silicon Silver -ium Other
E D
C76200 57.0-61.0 . . . 0.25 0.09 . 0.50 11.0– . . remainder . . . . . .
G
max max max 13.5
A
Includes silver + tin + tellurium + selenium.
B
Tellurium or selenium, or both.
C
Copper + the sum of the named elements shall be 99.9 % min.
D
Copper value includes silver.
E
Copper + the sum of the named elements shall be 99.5 % min.
F
Nickel + cobalt, 0.20 % min; nickel + iron +cobalt, 0.6 % max.
G
Includes cobalt.
H
Copper + the sum of the named elements shall be 99.8 % min.
I
Copper + the sum of the named elements shall be 99.7 % min.
J
Aluminum + zinc = 25.1–27.1.
B888/B888M − 19
7.2 Manufacture—The product shall be produced by either hot- or cold-working operation. It shall be finished, unless otherwise
specified, by such hot working, cold working, annealing, or heat treatment as may be necessary to meet the properties specified
in Table 2.
7.3 Edges—The edges shall be slit or rolled edges as specified by the buyer. Slit edges shall be furnished unless otherwise
specified or agreed upon between the purchaser and supplier or manufacturer.
8. Chemical Composition
8.1 The materials shall conform to the chemical compositional requirements in Table 1 for the corresponding Copper Alloy UNS
Number designation specified in the ordering information.
8.2 These composition limits do not preclude the presence of other elements. Limits for unnamed elements may be established
and analysis required by agreement between manufacturer or supplier and purchaser when required.
8.3 Copper, when given as the remainder, is determined as the difference between the sum of results for all elements determined
and 100 %.
8.4 Zinc, when given as the remainder, is determined as the difference between the sum of results for all elements determined
and 100 %.
8.4.1 For those copper alloys in which zinc is given as the remainder, copper may be determined by difference; however, when
so determined, the result shall conform to the limits prescribed in Table 1.
8.5 When a chemical analysis is performed as specified in the ordering information, for the Copper Alloy UNS No. in Table
1, copper plus the sum of the named elements shall be as specified in the appropriate table footnote.
B888/B888M − 19
TABLE 2 Mechanical Requirements
Yield Strength
Yield Strength
Temper Designation Tensile Strength, ksi Tensile Strength, MPa (0.2 % Offset), Elongation, %
(0.2 % Offset), ksi
MPa
Standard Former min max min max min min min
Copper Alloy UNS NO. C14530
H01 ⁄4 hard 35 45 240 310 26 180 7
H02 ⁄2 hard 40 50 275 345 33 230 5
H03 ⁄4 hard 44 54 305 370 39 270 3
H04 hard 47 57 325 395 43 295 2
H06 extra hard 50 60 345 415 47 325 1
H08 spring 54 64 370 440 51 350 1
H10 extra spring 58 . . . 400 . . . 56 385 . . .
Copper Alloy UNS NO. C15100
O61 annealed 37 42 255 290 9 60 35
H01 ⁄4 hard 40 45 275 310 26 180 11
H02 ⁄2 hard 43 51 295 350 35 240 4
H03 ⁄4 hard 47 56 325 385 45 310 2
H04 hard 53 62 365 425 51 350 2
H06 extra hard 59 65 405 450 57 395 1
H08 spring 64 71 440 490 62 425 1
Copper Alloy UNS NO. C15500
O61 annealed 34 43 235 295 15 105 30
H02 ⁄2 hard 45 55 310 380 38 260 13
H04 hard 56 64 385 440 50 345 6
H06 extra hard 63 72 435 495 56 385 5
H08 spring 65 73 450 505 60 415 4
H10 extra spring 68 75 470 515 63 435 3
Copper Alloy UNS NO. C17000
TB00 A 60 78 410 540 30 210 35
TD01 ⁄4 H 75 88 520 610 60 415 15
TD02 ⁄2 H 85 100 590 690 75 520 9
TD04 H 100 130 690 900 90 620 2
TF00 AT 150 180 1030 1240 130 900 3
TH01 ⁄4 HT 160 190 1100 1310 135 930 2.5
TH02 ⁄2 HT 170 200 1170 1380 145 1000 1
TH04 HT 180 210 1240 1450 155 1070 1
AM TM00 100 110 690 760 70 480 18
⁄4 HM TM01 110 120 760 830 80 550 15
⁄2 HM TM02 120 135 830 930 95 660 12
HM TM04 135 150 930 1030 110 760 9
SHM TM05 150 160 1030 1100 125 860 9
XHM TM06 155 175 1070 1210 135 930 3
Copper Alloy UNS NO. C17200
TB00 A 60 78 410 540 30 210 35
TD01 ⁄4 H 75 88 520 610 60 415 20
TD02 ⁄2 H 85 100 590 690 75 520 12
TD04 H 100 130 690 900 90 620 2
TF00 AT 165 195 1140 1340 140 970 4
TH01 ⁄4 HT 175 205 1210 1410 150 1030 3
TH02 ⁄2 HT 185 215 1280 1480 160 1100 2
TH04 HT 190 220 1310 1520 165 1140 1
AM TM00 100 110 690 760 70 480 16
⁄4 HM TM01 110 120 760 830 80 550 15
⁄2 HM TM02 120 135 830 930 95 660 12
HM TM04 135 150 930 1030 110 760 9
SHM TM05 150 160 1030 1100 125 860 9
XHM TM06 155 175 1070 1210 135 930 4
XHMS TM08 175 190 1210 1310 150 1030 3
Copper Alloy UNS NO. C17410
TH02 ⁄2 HT 95 115 665 790 80 550 10
TH04 HT 110 130 760 895 100 690 7
Copper Alloy UNS NO. C17450
TH02 ⁄2 HT 95 115 655 790 80 550 12
Copper Alloy UNS NO. C17460
TH03 ⁄4 HT 115 135 790 930 95 655 11
TH04 HT 120 140 825 965 105 720 10
Copper Alloy UNS NO. C17500
TB00 A 35 55 240 380 25 170 20
TD04 H 70 85 480 585 55 380 3
TF00 AT 100 120 690 830 80 550 10
TH04 HT 110 130 760 900 95 655 8
HTR 120 150 830 1030 110 760 1
HTC 75 85 512 590 50 340 8
Copper Alloy UNS NO. C17510
TB00 A 35 55 240 380 25 170 20
TD04 H 70 85 480 585 55 380 2
B888/B888M − 19
TABLE 2 Continued
Yield Strength
Yield Strength
Temper Designation Tensile Strength, ksi Tensile Strength, MPa (0.2 % Offset), Elongation, %
(0.2 % Offset), ksi
MPa
Standard Former min max min max min min min
TF00 AT 100 120 690 830 80 550 10
TH04 HT 110 140 760 965 95 655 8
Copper Alloy UNS No. C19002
TM04 HM 72 87 495 600 65 450 10
TM06 XHM 84 94 580 650 78 540 7
TM08 XHMS 89 101 615 695 82 565 5
TM05 SHM 84 94 580 650 75 515 8
Copper Alloy UNS NO. C19010
TM03 ⁄4 HM 67 77 460 520 50 340 12
TM04 HM 71 81 490 560 60 410 10
TM06 XHM 75 86 520 590 64 440 8
TM08 SHM 84 . . . 580 . . . 74 510 6
H01 ⁄4 hard 52 64 360 430 40 275 8
H02 ⁄2 hard 60 70 410 470 54 370 7
H03 ⁄4 hard 67 77 460 520 62 410 5
H04 hard 71 81 490 560 66 435 4
H06 extra hard 75 86 520 590 72 460 3
H08 spring 84 95 580 655 78 520 2
H10 extra spring 95 . . . 655 . . . 85 585 1
Copper Alloy UNS NO. C19015
H020 ⁄2 Hard 53 64 365 440 38 260 7
H040 Hard 60 71 415 490 54 370 5
H060 Extra hard 66 75 455 515 64 440 2
TM02 ⁄2 HM 70 81 485 485 55 380 10
TM04 HM 64 86 440 595 64 440 8
Copper Alloy UNS NO. C19025
HR01 ⁄4 hard 49 68 340 470 42 290 15
HR02 ⁄2 hard 63 76 435 525 58 400 9
HR04 hard 72 83 495 570 68 470 5
HR06 extra hard 78 89 540 615 74 510 4
HR08 spring 84 95 580 655 81 560 . . .
HR10 extra spring 91 106 625 730 88 605 . . .
Copper Alloy UNS NO. 19210
O61 annealed 27 42 190 290 16 110 30
H01 ⁄4 hard 43 53 300 365 20 135 20
H02 ⁄2 hard 47 60 325 410 44 310 5
H03 ⁄4 hard 52 62 355 425 50 345 4
H04 full hard 56 66 385 455 54 355 3
H06 extra hard 60 70 410 480 58 400 2
H08 spring hard 64 74 440 510 62 425 1
H10 extra spring 66 . . . 455 . . . 64 440 1
Copper Alloy UNS NO. C19400
O61 annealed 40 63 275 435 16 110 10
H02 ⁄2 hard 53 63 365 435 36 250 6
H04 full hard 60 70 415 485 53 365 3
H06 extra hard 67 73 460 505 64 440 2
H08 spring hard 70 76 485 525 67 460 2
H10 extra spring 73 80 505 550 70 485 1
Copper Alloy UNS NO. C19500
O61 annealed 50 60 345 415 21 145 22
H01 ⁄4 hard 60 72 415 495 45 310 5
H02 ⁄2 hard 68 78 470 540 66 455 3
H03 ⁄4 hard 75 85 515 585 72 495 2
H04 full hard 82 90 565 620 79 545 2
H08 spring 88 97 605 670 85 585 1
Copper Alloy UNS NO. C19700
O61 annealed 43 53 295 365 16 110 20
H02 ⁄2 hard 53 63 365 435 36 250 6
H04 full hard 60 70 415 485 53 365 2
H06 extra hard 67 73 460 505 64 440 2
H08 spring hard 70 76 485 525 67 460 2
H10 extra spring 73 80 505 550 70 485 1
Copper Alloy UNS NO. C23000
O61 annealed 39 47 270 325 8 55 43
H01 ⁄4 hard 44 54 305 370 23 160 15
H02 ⁄2 hard 51 61 350 420 43 295 8
H03 ⁄4 hard 57 67 395 460 51 350 4
H04 hard 63 72 435 495 57 395 4
H06 extra hard 72 80 495 550 65 450 3
H08 spring 78 86 540 595 69 475 3
H10 extra spring 82 90 565 620 73 505 2
B888/B888M − 19
TABLE 2 Continued
Yield Strength
Yield Strength
Temper Designation Tensile Strength, ksi Tensile Strength, MPa (0.2 % Offset), Elongation, %
(0.2 % Offset), ksi
MPa
Standard Former min max min max min min min
Copper Alloy UNS NO. C26000
O61 annealed 45 61 310 420 10 70 40
H01 ⁄4 hard 49 59 340 405 21 145 34
H02 ⁄2 hard 57 67 395 460 42 290 19
H03 ⁄4 hard 64 74 440 510 55 380 8
H03 ⁄4 hard 64 74 440 510 44 300 8
H04 hard 71 81 490 560 67 460 6
H04 hard 71 81 490 560 64 440 6
H06 extra hard 83 92 570 635 79 545 2
H06 extra hard 83 92 570 635 76 525 2
H08 spring 91 100 625 690 82 565 1
H08 spring 91 100 625 690 80 550 1
H10 extra spring 95 104 655 715 86 595 1
H10 extra spring 95 104 655 715 83 570 1
Copper Alloy UNS NO. C40810
H02 ⁄2 hard 57 73 395 505 41 285 20
H04 hard 75 87 515 600 68 470 8
H06 extra hard 88 97 605 670 84 580 6
H08 spring 92 100 635 690 88 605 4
Copper Alloy UNS NO. C40850
H02 ⁄2 hard 57 73 395 505 41 285 20
H04 hard 75 87 515 600 68 470 8
H06 extra hard 88 97 605 670 84 580 6
H08 spring 92 104 635 715 90 620 4
Copper Alloy UNS NO. C40860
H02 ⁄2 hard 56 72 385 495 40 275 20
H04 hard 73 86 505 595 66 455 8
H06 extra hard 86 96 595 660 84 580 6
H08 spring 90 103 620 710 88 605 4
Copper Alloy UNS NO. C42200
O61 annealed 41 49 285 340 12 85 43
H01 ⁄4 hard 47 57 325 395 21 145 17
H02 ⁄2 hard 54 65 370 450 48 330 6
H03 ⁄4 hard 60 72 415 495 58 400 4
H04 hard 67 79 460 545 67 460 3
H06 extra hard 75 85 515 585 72 495 2
H08 spring 82 92 565 635 77 530 2
H10 extra spring 88 . . . 605 . . . 82 565 1
Copper Alloy UNS NO. C42500
O61 annealed 41 47 285 325 13 90 47
H01 ⁄4 hard 49 59 340 405 20 140 24
H02 ⁄2 h
...