ASTM B747-20

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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: B747 − 15 B747 − 20
Standard Specification for
Copper-Zirconium Alloy Sheet and Strip
This standard is issued under the fixed designation B747; 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 UNS C15100 sheet and strip.
1.2 Units—Values The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are
mathematical conversions to SI units, whichunits that are provided for information only and are not considered standard.
1.2.1 Exception—Values given in inch-pound units are the standard except for grain size, which is stated in SI units.
1.3 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
B601 Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
B846 Terminology for Copper and Copper Alloys
E3 Guide for Preparation of Metallographic Specimens
E8/E8M Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E53 Test Method for Determination of Copper in Unalloyed Copper by Gravimetry
E112 Test Methods for Determining Average Grain Size
E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
E478 Test Methods for Chemical Analysis of Copper Alloys
3. General Requirements
3.1 The following sections of Specification B248 constitute a part of this specification:
3.1.1 Terminology,Terminology
3.1.2 Workmanship, Finish, and Appearance,Appearance
3.1.3 Sampling,Sampling
3.1.4 Number of Tests and Retests,Retests
3.1.5 Specimen Preparation,Preparation
3.1.6 Significance of Numerical Limits,Limits
3.1.7 Inspection,Inspection
3.1.8 Rejection and Rehearing,Rehearing
3.1.9 Certification,Certification
3.1.10 Test Report,Report
3.1.11 Packaging and Package Marking, andMarking
3.1.12 Supplementary Requirements.Requirements
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.01 on Plate,
Sheet, and Strip.
Current edition approved Oct. 1, 2015April 15, 2020. Published October 2015April 2020. Originally approved in 1985. Last previous edition approved in 20112015 as
B747–11.–15. DOI: 10.1520/B0747-15.10.1520/B0747–20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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
B747 − 20
4. Terminology
4.1 For definition of terms related to copper and copper alloys, refer to Terminology B846.
5. Ordering Information
5.1 Include the following specified choices when placing orders for product under this specification, as applicable:
5.1.1 ASTM designation number and year of issue,
5.1.2 Copper [Alloy] UNS No. designation,No.,
5.1.3 Temper,Temper (Section 8),
5.1.4 Dimensions (thickness, width, length, if applicable),
5.1.5 How furnished (rolls, specific lengths with or without ends, stock lengths with or without ends),furnished: straight lengths
or coils,
5.1.6 Quantity–total weight or total length or number of pieces of each size,
5.1.7 Type of edge, if required (slit, sheared, sawed, square corners, rounded corners, rounded edges, or full-rounded edges),
5.1.8 Type of width and straightness tolerances, if required (slit metal tolerances, square sheared metal tolerances, sawed metal
tolerances, straightened or edge-rolled metal tolerances), and
5.1.9 Intended application.
5.2 The following options are available but may not be included unless specified at the time of placing of the order when
required:
5.2.1 Heat identification or traceability details,
5.2.2 Certification,
5.2.3 Test Report,
5.2.4 If product specification number must be shown on package marking, and
5.2.5 If product is purchased for agencies of the U.S. Government (See Supplemental Requirements section of Specification
B248 for additional requirements).
6. Materials and Manufacture
6.1 Materials:
6.1.1 The material of manufacture shall be a form (cast bar, cake, slab, etcetera)etc.) of Copper Alloy UNS No. C15100 of such
purity and soundness as to be suitable for processing into the products prescribed herein.
6.1.2 When specified in the contract or purchase order, that heat identification or traceability is required, the purchaser shall
specify the details desired.
NOTE 1—Due to the discontinuous nature of the processing of castings into wrought products, it is not always practical to identify a specific casting
analysis with a specific quantity of finished material.
6.2 Manufacture:
6.2.1 The product shall be manufactured by such hot-working, cold-working, hot working, cold working, and annealing
processes as to produce a uniform wrought structure in the finished product.
6.2.2 The product shall be hot-hot or cold-worked cold worked to the finished size, and subsequently annealed, when required,
to meet the temper properties specified.
6.3 Edges:
6.3.1 Slit edges shall be furnished unless otherwise specified in the contract or purchase order.
7. Chemical Composition
7.1 The material shall conform to the chemical composition requirements in Table 1.
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 When all elements in Table 1 are determined, the sum of the results shall be 99.9 % min.
TABLE 1 Chemical Requirements
Composition, %
Element
Copper Alloy
UNS No. C15100
Copper (including Ag) 99.80 % min
Zirconium 0.05–0.15
Cu + sum of named elements 99.9 % min
B747 − 20
8. Temper
8.1 The standard tempers for products described in this specification are given in Table 2.
8.1.1 Cold rolled tempers H01 to H08.
8.1.2 Annealed temper OS015.
9. Grain Size for Annealed Temper
9.1 Grain size shall be the standard requirement for all product in the annealed tempers.temper.
9.2 Acceptance or rejection based upon grain size shall depend only on the average grain size of a test specimen taken from
each of two sample portions, and each specimen shall be within the limits prescribed in Table 2 when determined in accordance
with Test Methods E112.
10. Physical Property Requirements
10.1 Electrical Resistivity Requirement:
10.1.1 The product furnished shall conform to the electrical mass resistivity requirement prescribed in Table 3 when tested in
accordance with Test Method B193.
11. Mechanical Property Requirements
11.1 Tensile Strength Requirements:
11.1.1 Product furnished under this specification shall conform to the tensile requirements prescribed in Table 2, when tested
in accordance with Test Methods E8/E8M.
11.1.2 Acceptance or rejection based upon mechanical properties shall depend only on tensile strength.
12. Dimensions, Mass, and Permissible Variation
12.1 The dimensions and tolerances for product described by this specification shall be as specified in Specification B248 with
particular reference to the following tables and related paragraphs:
12.2 Thickness.
12.3 Width:
12.3.1 Slit Metal and Slit Metal with Rolled Edges—Table 4.
12.3.2 Square Sheared Metal—Table 5.
12.3.3 Sawed Metal—Table 6.
12.4 The dimensions and tolerances for product described by this specification shall be as specified in Specification B248 with
particular reference to the following tables and related paragraphs as noted to Specification B747 in the table title:Length:
12.4.1 Thickness. Length Tolerance for Straight Lengths—Table 7.
12.1.2 Width:
12.1.2.1 Slit Metal and Slit Metal with Rolled Edges.
12.1.2.2 Square Sheared Metal.
12.1.2.3 Sawed Metal.
12.4.2 Length: Schedule for Minimum Lengths and Maximum Weights of Ends for Specific Lengths with Ends, and Stock
Lengths with Ends—
12.1.3.1 Length Tolerance for Straight Lengths. Table 8.
TABLE 2 Tensile Strength and Grain Size Requirements
A B C
Temper Designation Tensile Strength, ksi (MPa) Grain Size,
D
mm
Code Name Min Max
OS015 annealed . . 0.030 max
H01 quarter hard 40 (275) 45 (310) .
H02 half hard 43 (295) 51 (350) .
H03 three-quarter 47 (325) 56 (385) .
hard
H04 hard 53 (365) 62 (425) .
H06 extra hard 59 (405) 65 (450) .
H08 spring 64 (440) 71 (490) .
A
Standard designations defined in Classification B601.
B
ksi = 1000 psi.
C
See Appendix X1.
D
Although no minimum grain size is required, this material must be fully
recrystallized.
B747 − 20
TABLE 3 Electrical Resistivity
Equivalent
Electrical Resistivity
Conductivity
at 20°C (68°F),20 °C
Temper at 20°C (68°F),20 °C
(68 °F),
(68 °F),
max, Ω·g/m
% IACS, min
Annealed (OS015) 0.16136 95
Rolled (H01, H02, H03, 0.17031 90
H04, H06, H08)
12.1.3.2 Schedule for Minimum Lengths and Maximum Weights of Ends for Specific Lengths with Ends, and Stock Lengths with
Ends.
12.1.3.3 Length Tolerance for Square Sheared Metal.
12.1.3.4 Length Tolerance for Sawed Metal.
12.4.3 Straightness: Length Tolerance for Square Sheared Metal—
12.1.4.1 Slit Metal or Slit Metal Either Straightened or Edge Rolled. Table 9.
12.1.4.2 Square Sheared Metal.
12.1.4.3 Sawed Metal.
12.4.4 Edges Contours: Length Tolerance for Sawed Metal—
12.1.5.1 Square Corners. Table 10.
12.1.5.2 Rounded Corners.
12.1.5.3 Rounded Edges.
12.1.5.4 Full-Rounded Edges.
12.5 Straightness:
12.5.1 Slit Metal or Slit Metal Either Straightened or Edge Rolled—Table 11.
12.5.2 Square Sheared Metal—Table 12.
12.5.3 Sawed Metal—Table 13.
12.6 Edges Contours:
12.6.1 Square Corners—Table 14.
12.6.2 Rounded Corners. Table 15.
12.6.3 Rounded Edges—Table 16.
12.6.4 Full-Rounded Edges—Table 17.
13. Workmanship, Finish, and Appearance
13.1 The product shall be free of defects, but blemishes of a nature that do not interfere with the intended application are
acceptable. It shall be well-cleaned well cleaned and free of dirt. A superficial film of residual light lubricant is normally present
and is acceptable unless other
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