ASTM B5-22

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: B5 − 16 B5 − 22
Standard Specification for
High Conductivity Tough-Pitch Copper Refinery Shapes
This standard is issued under the fixed designation B5; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification establishes the requirements for high conductivity, tough-pitch, copper wire bars, cakes, slabs, billets, ingots,
and ingot bars.
1.2 Copper under this specification corresponds to the designations “ETP” (UNS C11000) and “FRHC” (UNS C11020) as shown
in Classification B224. These coppers may also be used to produce coppers corresponding to the following:
Copper UNS No. Classification B224 Designation
C11300, C11400, C11500, and C11600 STP
C12000 DLP
C12200 DHP
C12300 DHPS
C14520 DPTE
1.3 Although this specification includes certain UNS designations as described in Practice E527, these designations are for cross
reference only and are not specification requirements. Therefore, in case of conflict, this ASTM specification shall govern.
1.4 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.
1.4.1 Exception—Electrical resistivity is expressed in SI units.
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:
B193 Test Method for Resistivity of Electrical Conductor Materials
B224 Classification of Coppers
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.07 on Refined
Copper.
Current edition approved Oct. 1, 2016Oct. 1, 2022. Published November 2016October 2022. Originally approved in 1911. Last previous edition approved in 20112016
as B5 – 11.B5 – 16. DOI: 10.1520/B0005-16.10.1520/B0005-22.
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
B5 − 22
B846 Terminology for Copper and Copper Alloys
B950 Guide for Editorial Procedures and Form of Product Specifications for Copper and Copper Alloys
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 (Withdrawn 2022)
E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
E478 Test Methods for Chemical Analysis of Copper Alloys
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
3. Terminology
3.1 For definitions of terms related to copper and copper alloys, refer to Terminology B846. For definitions of terms related to
standard classification of coppers, refer to Classification B224.
4. Ordering Information
4.1 Include the following information, as applicable:
4.1.1 ASTM Specification Designation and year of issue;
4.1.2 Copper UNS No. Designation;
4.1.3 Quantity, shape, and dimension of each piece, and weight;
4.1.4 Should cakes, slabs, or billets be ordered for electrical use, it must be stated in the contract or purchase order.
4.1.5 Silver content in silver-bearing shapes, when required, in troy oz per short ton.
5. Materials and Manufacture
5.1 Materials:
5.1.1 The material of manufacture shall be a form (copper wire bar, cake, slabs, billets, ingots, and ingot bars) of Copper Alloy
“ETP” (UNS C11000) or “FRHC” (UNS C11020) of such purity and soundness as to be suitable for processing into the prescribed
herein.
5.1.2 When specified in the contract or purchase order that heat identification or traceability is required, the purchaser shall specify
the details desired.
The last approved version of this historical standard is referenced on www.astm.org.
B5 − 22
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.
5.2 Manufacture:
5.2.1 The product shall be hot- or cold-worked as to produce a uniform wrought structure in the finished product.
6. Chemical Composition
6.1 The copper in all shapes shall meet the minimum requirement for copper, including silver, of 99.90 %.
6.1.1 These composition limits do not preclude the presence of other elements. Limits for unnamed elements may be established,
and analysis required, by agreement between the supplier and the purchaser.
6.2 For the STP (silver-bearing) coppers, the addition of silver up to an average of 30 troy oz per short ton (0.10 %) will be
considered within the specification, with no individual silver analysis to exceed 35 troy oz per short ton (0.12 %).
7. Physical Property Requirements
7.1 Electrical Resistivity:
7.1.1 The maximum mass resistivity for wire bars, cakes, slabs, and billets for electrical use shall be 0.153 28 Ω·g ⁄m (conduc-
tivity 100.00 % minimum, International Annealed Copper Standard, (IACS)), at 68°F (20°C),68 °F (20 °C), annealed.
7.1.2 The maximum mass resistivity for other uses shall be 0.156 94 Ω·g/m (conductivity 97.66 % minimum IACS), at 68°F
(20°C),68 °F (20 °C), annealed.
7.1.3 The maximum mass resistivity for ingots and ingot bars shall be 0.156 94 Ω·g/m (conductivity 97.66 % minimum IACS),
at 68°F (20°C),68 °F (20 °C), annealed.
8. Dimensions, Mass, and Permissible Variations
8.1 Standard Sizes and Shapes of Wire Bars:
8.1.1 One size of mold shall be used for casting 200-200 lb to 230-lb (91-230 lb (91 kg to 104-kg)104 kg) wire bars, the bottom
width of these bars to be 3 ⁄2 in. (89 mm), the listed weights being 200 and 225 lbs (91 200 lb and 225 lb (91 kg and 102 kg) (Fig.
1).
8.1.2 One size of mold shall be used for casting 240-240 lb to 300-lb (109-300 lb (109 kg to 136-kg)136 kg) wire bars, the bottom
width of these bars to be 4 in. (102 mm), the listed weights being 250, 265, 275,250 lb, 265 lb, 275 lb, and 300 lbs (113, 120, 125,lb
(113 kg, 120 kg, 125 kg, and 136 kg) (Fig. 2).
3 3
8.1.3 All bars shall be 54 in. (1.372 m) in length. The side draft or taper shall be ⁄8 in. (9.5 mm) in 4 in. ( ⁄16 in. (4.8 mm) in 4
in. on each side of the bar). The radius of the corners at the bottom of the bars shall be ⁄8 in. (15.9 mm). The end taper at the bottom
shall be 6 in. (152.4 mm) in overall length and approximately 2 in. (50.8 mm)/ft (304.8 mm). The end taper of the side shall be
1 3
approximately 2 ⁄4 in. (57.1 mm)/ft and the end of the bar shall be approximately 3 ⁄8 in. (85.7 mm) in depth at the point.
8.1.4 Wire bars not conforming to the requirements of Fig. 1 or Fig. 2, but otherwise meeting the requirements of this specification,
may be supplied by agreement between the manufacturer and the purchaser.
8.2 Permissible Variations in Weight and Dimensions—A permissible variation of 65 % in weight or 6 ⁄4 in. (6.3 mm) in any
dimension from the manufacturer’s published list or the purchaser’s specified size shall be considered good delivery; provided,
however, that wire bars may vary in length 61 % from the listed or specified length, and cakes may vary 63 % from the listed
or specified size in any dimension greater than 8 in. (203.2 mm). The weight of copper in ingots and ingot bars shall not exceed
that specified by more than 10 %, but otherwise its variation is not important.
B5 − 22
Inch-Pound Units SI Units Inch-Pound Units SI Units
3 7
⁄16 in. 4.763 mm 3 ⁄8 in. 98 mm
⁄8 in. 15.875 mm 4 in. 102 mm
1 in. 25.4 mm 6 in. 152.4 mm
1 ⁄2 in. 38.1 mm 12 in. 304.8 mm
2 ⁄4 in. 57.15 mm 54 in. 1.372 m
3 ⁄2 in. 89 mm 200 lbs 91 kg
3 ⁄2 in. 89 mm 200 lb 91 kg
3 ⁄8 in. 92 mm 225 lbs 102 kg
3 ⁄8 in. 92 mm 225 lb 102 kg
FIG. 1 Copper Wire Bars, 200200 lb and 225 lbslb
9. Workmanship, Finish, and Appearance
9.1 Wire bars, cakes, slabs, and billets shall be substantially free of shrink holes, cold sets, pits, sloppy edges, concave tops, and
similar defects in set or casting. This requirement shall not apply to ingots or ingot bars, in which physical defects are of no
consequence.
9.2 Blemishes of a nature that do not interfere with the intended application are acceptable.
10. Sampling
10.1 For routine sampling, the sampling practice shall be at the discretion of the sampler.
10.2 In case o
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