ASTM B740-02

Standard Specification for Copper-Nickel-Tin Spinodal Alloy Strip

ABSTRACT
This specification establishes the requirements for copper-nickel-tin spinodal alloy strips with Copper Alloy UNS Nos. C72700, C72900, and C72650. Tempers are available as follows: TB00 (solution heat treated), TD01 to TD12 (solution heat treated and cold worked), TX00 or TS01 to TS12 (spinodal hardened), or TM00 to TM08 (mill hardened). Materials shall be prepared and tested accordingly to examine their conformance to mechanical (tensile and yield strength, elongation, ductility, and bend ratio), chemical composition, and grain size requirements. Retests shall be performed on any lot of material that fails to adhere to specified requirements due to inadequate heat treatment, or fails to meet bend test requirements.
SCOPE
1.1 This specification establishes requirements for copper-nickel-tin alloy strip in the following alloys:Nominal Composition Weight %Copper Alloy UNS No.CopperNickelTinC727008596C7290077158C7265087.57.55
1.2 Units—The values stated in inch-pound units and the values stated in SI units in Table 5 are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units and are provided for information only and are not considered standard.

General Information

• Status: Historical
• Publication Date: 09-Jul-2002
• ICS: 77.150.30 - Copper products
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.01 - Plate, Sheet, and Strip

Relations

• Replaces: ASTM B740-96 - Standard Specification for Copper-Nickel-Tin Spinodal Alloy Strip
• Effective Date: 10-Jul-2002
• Replaced By: ASTM B740-09 - Standard Specification for Copper-Nickel-Tin Spinodal Alloy Strip
• Effective Date: 15-Aug-2009
• Referred By: ASTM B248-22 - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled Bar
• Effective Date: 10-Jul-2002
• Referred By: ASTM B888/B888M-19 - Standard Specification for Copper Alloy Strip for Use in Manufacture of Electrical Connectors or Spring Contacts
• Effective Date: 10-Jul-2002
• Referred By: ASTM B315-19 - Standard Specification for Seamless Copper Alloy Pipe and Tube
• Effective Date: 10-Jul-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B 740 – 02
Standard Specification for
1
Copper-Nickel-Tin Spinodal Alloy Strip
This standard is issued under the fixed designation B 740; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope * E 290 Test Method for Bend Testing of Material for Duc-
3
tility
1.1 This specification establishes requirements for copper-
E 478 Test Methods for Chemical Analysis of Copper
nickel-tin alloy strip in the following alloys:
4
Alloys
Nominal Composition Weight %
Copper Alloy UNS No.
Copper Nickel Tin
3. General Requirements
C72700 85 9 6
C72900 77 15 8
3.1 The following sections of Specification B 248 constitute
C72650 87.5 7.5 5
a part of this specification:
1.2 Units—The values stated in inch-pound units and the
3.1.1 Terminology,
values stated in SI units in Table 5 are to be regarded as
3.1.2 Materials and Manufacture,
standard. The values given in parentheses are mathematical
3.1.3 Dimensions and Permissible Variations,
conversions to SI units and are provided for information only
3.1.4 Workmanship, Finish, and Appearance,
and are not considered standard.
3.1.5 Sampling,
3.1.6 Significance of Numerical Limits,
2. Referenced Documents
3.1.7 Inspection,
2.1 The following documents of the issue in effect on date
3.1.8 Rejection and Rehearing,
of material purchase form a part of this specification to the
3.1.9 Certification,
extent referenced herein:
3.1.10 Test Reports, and
2.2 ASTM Standards:
3.1.11 Packaging and Package Marking.
B 248 Specification for General Requirements for Wrought
3.2 In addition, when a section with a title identical to that
Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled
referencedin3.1aboveappearsinthisspecification,itcontains
2
Bar
additional requirements that supplement those appearing in
B 598 Practice for Determining Offset Yield Strength in
Specification B 248.
2
Tension for Copper Alloys
B 601 Classification for Temper Designations for Copper 4. Terminology
2
and Copper Alloys—Wrought and Cast
4.1 For definitions of terms related to copper and copper
B 820 Test Method for BendTest for Formability of Copper
alloys, refer to Terminology B 846.
2
Alloy Spring Material
2
B 846 Terminology for Copper and Copper Alloys 5. Ordering Information
3
E 3 Guide for Preparation of Metallographic Specimens
5.1 Include the following information in orders for prod-
3
E 8 Test Methods forTensionTesting of Metallic Materials
ucts:
E 75 Test Methods for ChemicalAnalysis of Copper-Nickel
5.1.1 Specification number and date,
4
and Copper-Nickel-Zinc Alloys
5.1.2 Quantity,
5.1.3 Copper Alloy UNS number (see 1.1),
1 5.1.4 Form of material: strip,
This specification is under the ASTM Committee B05on Copper and Copper
5.1.5 Temper (see 7.1),
Alloys and is the direct responsibility of Subcommittee B05.01 on Plate, Sheet, and
Strip.
5.1.6 Dimensions: thickness and width, and length if appli-
Current edition approved July 10, 2002. Published September 2002. Originally
cable,
published as B 740 – 84. Last previous edition B 740 – 96.
2
5.1.7 How furnished: rolls or coils, stock lengths with or
Annual Book of ASTM Standards, Vol 02.01.
3
Annual Book of ASTM Standards, Vol 03.01. without ends, specific lengths with or without ends, and
4
Annual Book of ASTM Standards, Vol 03.05.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B740–02
5.1.8 Type of edge other than slit, for example, rounded 9.1.1 The solution heat-treated or solution heat-treated and
corners, rounded edges, or full-rounded edges. cold-worked material shall conform to the tensile property
5.1.9 When material is purchased for agencies of the U.S. requirements specified in Table 2, when tested in accordance
government, this shall be specified in the contract or purchase with Test Methods E 8.
order, and the material shall conform to the Supplementary 9.1.2 The spinodal heat-treated material shall conform to
Requirements as defined in the current edition of Specification the tensile property requirements specified inTable 3. Spinodal
B 248. heat-treatment parameters are given in 11.1.
5.2 The following options are available and should be 9.1.3 The mill-hardened material shall conform to the ten-
specified at the time of placing of the order when required: sile property requirements specified in Table 4.
5.2.1 Width and straightness tolerances, if different from
those requ
...