ASTM B379-20

Standard Specification for Phosphorized Coppers—Refinery Shapes

ABSTRACT
This specification establishes the requirements for phosphorized copper in refinery shapes such as wire bars, billets, and cakes. The product furnished shall be produced from one of the following copper UNS Nos.: C10300, C10800, C12000, C12200, and C14200. Billets shall be supplied sheared on one end with the other end flat or with both ends flat depending on the specified diameter. The product shall conform to the chemical composition requirements prescribed for copper and silver, phosphorus, and arsenic. The electrical mass resistivity for phosphorized copper in annealed condition is specified. The requirements for chemical analysis, reverse bend test (hydrogen embrittlement susceptibility), and microscopical examination are detailed including sampling and specimen preparation.
SCOPE
1.1 This specification establishes the requirements for phosphorized copper wire bars, billets, and cakes.
Note 1: Wire bars furnished under this specification do not conform in dimensions with that furnished under Specification B5.  
1.2 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.  
1.3 The following safety hazard caveat pertains only to the test method in 14.2 and 14.3 in this specification.  
1.3.1 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.  
1.4 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: 31-Mar-2020
• ICS: 77.150.30 - Copper products
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.07 - Refined Copper

Relations

• Replaces: ASTM B379-11(2018) - Standard Specification for Phosphorized Coppers—Refinery Shapes
• Effective Date: 01-Apr-2020
• Refers: ASTM B846-19a - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Aug-2019
• Refers: ASTM B577-19 - Standard Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
• Effective Date: 01-Apr-2019
• Refers: ASTM B846-19 - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Jan-2019
• Refers: ASTM B193-16 - Standard Test Method for Resistivity of Electrical Conductor Materials
• Effective Date: 01-Apr-2016
• Refers: ASTM B577-16 - Standard Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
• Effective Date: 01-Apr-2016
• Refers: ASTM B224-15 - Standard Classification of Coppers
• Effective Date: 01-May-2015
• Refers: ASTM B224-14 - Standard Classification of Coppers
• Effective Date: 01-Jul-2014
• Refers: ASTM B193-02(2014) - Standard Test Method for Resistivity of Electrical Conductor Materials
• Effective Date: 01-Apr-2014
• Refers: ASTM B846-11a - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Jun-2011
• Refers: ASTM B846-11 - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Jan-2011
• Refers: ASTM B224-10 - Standard Classification of Coppers
• Effective Date: 01-Oct-2010
• Refers: ASTM B577-10 - Standard Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
• Effective Date: 01-Oct-2010
• Refers: ASTM B846-09a - Standard Terminology for Copper and Copper Alloys
• Effective Date: 15-Nov-2009
• Refers: ASTM B846-09 - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Nov-2009

Overview

ASTM B379-20: Standard Specification for Phosphorized Coppers-Refinery Shapes defines the requirements for phosphorized copper in refinery shapes, including wire bars, billets, and cakes. The specification covers material produced from several copper UNS designations, namely C10300, C10800, C12000, C12200, and C14200, ensuring precise standards for chemical composition, physical properties, and quality control for products used in copper processing and manufacturing.

This standard is developed and maintained by ASTM, reflecting internationally recognized principles of technical standardization. Its purpose is to guarantee consistent copper quality, safety during handling and testing, and suitability for electrical and industrial applications.

Key Topics

• Materials Covered: Specifies five UNS copper numbers-C10300, C10800, C12000, C12200, and C14200-each with clearly defined minimum copper content and controlled levels of phosphorus and arsenic.
• Product Forms: Applies to refinery shapes such as wire bars, billets, and cakes. Shape requirements and end conditions (sheared, flat) are detailed by size and user need.
• Chemical Composition: Outlines minimum copper (including silver) percentages, and specific maximum allowable amounts of phosphorus and arsenic for each specified UNS number.
• Electrical Properties: Products must meet defined electrical resistivity limits when annealed, supporting use in electrical applications where conductivity is critical.
• Mechanical Testing: Includes requirements for hydrogen embrittlement susceptibility (reverse bend test) and microscopical examination to confirm freedom from cuprous oxide in select UNS numbers.
• Sampling and Inspections: Provides procedures for lot sampling, specimen preparation, number of tests, retesting, and product inspection by both manufacturer and purchaser.
• Documentation and Marking: Details purchase order information, certification, test reporting, traceability, and packaging/marking for shipment.

Applications

Phosphorized copper shapes produced to ASTM B379-20 are integral to numerous industrial and electrical applications due to their enhanced conductivity and mechanical properties. Common uses include:

• Electrical Refining: Manufacturing of rods and bars for electrical conductors where high conductivity is required.
• Fabrication Stock: Supply of billets and cakes as feedstock for the production of wires, tubes, and other copper alloy products.
• Manufacturing of Components: Used in the production of parts that require strict chemical composition and minimal hydrogen embrittlement risk.
• Industrial Processes: Serves industries such as electrical engineering, metallurgy, and electronics manufacturing where consistent material quality is vital.

Related Standards

ASTM B379-20 references and relates to several ASTM standards crucial for copper processing:

• ASTM B5: Specification for High Conductivity Tough-Pitch Copper Refinery Shapes
• ASTM B193: Test Method for Resistivity of Electrical Conductor Materials
• ASTM B224: Classification of Coppers
• ASTM B577: Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
• ASTM E3: Guide for Preparation of Metallographic Specimens
• ASTM E8/E8M: Test Methods for Tension Testing of Metallic Materials
• ASTM E29: Practice for Using Significant Digits in Test Data
• ASTM E53, E255: Methods for Chemical Analysis and Sampling of Copper and Copper Alloys

Conclusion

ASTM B379-20 ensures that phosphorized copper refinery shapes meet stringent chemical, physical, and mechanical requirements, ensuring their reliability and safety in critical electrical and industrial applications. Adherence to this standard supports manufacturers and users in achieving high product quality, safety, and traceability, while facilitating interoperability within the global copper supply chain.

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:B379 −20
Standard Specification for
Phosphorized Coppers—Refinery Shapes
This standard is issued under the fixed designation B379; 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* B577TestMethodsforDetectionofCuprousOxide(Hydro-
gen Embrittlement Susceptibility) in Copper
1.1 Thisspecificationestablishestherequirementsforphos-
B846Terminology for Copper and Copper Alloys
phorized copper wire bars, billets, and cakes.
E3Guide for Preparation of Metallographic Specimens
NOTE1—Wirebarsfurnishedunderthisspecificationdonotconformin
E29Practice for Using Significant Digits in Test Data to
dimensions with that furnished under Specification B5.
Determine Conformance with Specifications
1.2 Units—The values stated in inch-pound units are to be
E53Test Method for Determination of Copper in Unalloyed
regarded as standard. The values given in parentheses are
Copper by Gravimetry
mathematical conversions to SI units that are provided for
E62Test Methods for Chemical Analysis of Copper and
information only and are not considered standard.
CopperAlloys(PhotometricMethods)(Withdrawn2010)
E255Practice for Sampling Copper and Copper Alloys for
1.3 The following safety hazard caveat pertains only to the
the Determination of Chemical Composition
test method in 14.2 and 14.3 in this specification.
1.3.1 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 For definitions of terms related to copper and copper
responsibility of the user of this standard to establish appro-
alloys, refer to Terminology B846.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 copper, oxygen-free—electrolytic copper produced
1.4 This international standard was developed in accor-
without the use of metallic or metalloidal deoxidizers, free of
dance with internationally recognized principles on standard-
cuprous oxide as determined by metallographic examination at
ization established in the Decision on Principles for the
75× under polarized light.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Ordering Information
Barriers to Trade (TBT) Committee.
4.1 Contracts or purchase orders for product under this
specification should include the following information:
2. Referenced Documents
4.1.1 ASTM designation and year of issue (for example,
2.1 ASTM Standards:
B379–XX);
B5Specification for High ConductivityTough-Pitch Copper
4.1.2 Copper UNS Number (for example, C10800);
Refinery Shapes
4.1.3 Shape required: wire bar, billet or cake;
B193Test Method for Resistivity of Electrical Conductor
4.1.3.1 Billet end type,
Materials
4.1.4 Dimensions and tolerances (Section 10); and
B224Classification of Coppers
4.1.5 Quantity: total weight or number of pieces for each
shape, size.
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
4.2 The following are optional and should be specified in
and Copper Alloys and is the direct responsibility of Subcommittee B05.07 on
the contract or purchase order when required:
Refined Copper.
4.2.1 Hydrogen embrittlement test (Section 8),
Current edition approved April 1, 2020. Published April 2020. Originally
approvedin1962.Lastpreviouseditionapprovedin2018asB379–11(2018).DOI: 4.2.2 Certification (Section 19), and
10.1520/B0379–20.
4.2.3 Test report (Section 20).
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 last approved version of this historical standard is referenced on
the ASTM website. 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
B379−20
TABLE 1 Chemical Requirements
Composition, %
Copper UNS No. Type Phosphorus Arsenic
Copper (Including
Silver), min
min max min max
A
C10300 OFXLP 99.95 0.001 0.005 . . . . . .
A
C10800 OFLP 99.95 0.005 0.012 . . . . . .
C12000 DLP 99.90 0.004 0.012 . . . . . .
C12200 DHP 99.9 0.015 0.040 . . . . . .
B
C14200 DPA 99.4 0.015 0.040 0.15 0.50
A
Includes phosphorus.
B
Copper (including phosphorus and arsenic) = 99.9 % min.
5. Materials and Manufacture 7.1.2 The maximum mass resistivity for Copper UNS Nos.
C10800 and C12000, in the annealed condition, shall be
5.1 Material:
0.17081 ohm · g/m (conductivity 90%, minimum, Interna-
5.1.1 The product furnished shall be produced from one of
tional Annealed Copper Standard (IACS)) at 68°F (20°C).
the following coppers as specified in the contract or purchase
order:
8. Performance Requirements
A
UNS Nos. Former Description
8.1 Reverse Bend Test (Hydrogen Embrittlement Suscepti-
C10300 OFXLP Oxygen-free, extra low
bility):
phosphorus
C10800 OFLP Oxygen-free, low phosphorus
8.1.1 When specified in the contract or purchase order,
C12000 DLP Phosphorus deoxidized, low
specimens of product produced of coppers UNS Nos. C10300,
residual phosphorus
C10800, and C12000 shall be capable of withstanding a
C12200 DHP Phosphorus deoxidized, high
residual phosphorus
minimum of four bends without fracturing when tested in
C14200 DPA Phosphorus deoxidized, arsenical
accordance with Test Method D of the current revision of Test
A Methods B577.
Refer to Table X1.1 of Classification B224 for former copper designations.
5.2 Manufacture:
9. Microscopical Examination
5.2.1 Billets—Unless specified otherwise, product up to and
9.1 Coppers UNS Nos. C10300, C10800, and C12000 shall
including 4 in. (102 mm) in diameter may be supplied sheared
ononeendwiththeotherendflat.Billetsover4in.indiameter be essentially free of cuprous oxide as determined by exami-
nation in accordance with Test Method A of the current
shallbesuppliedwithbothendsflat.Billetsshallnotbecupped
except by specific agreement between the manufacturer or revision of Test Methods B577.
supplier and the purchaser at the time of purchase and the
agreement shall be part of the contract or purchase order. 10. Dimensions, Mass, and Permissible Variations
10.1 Wire Bars:
6. Chemical Composition
10.1.1 Themanufacturerorsuppliershouldbeconsultedfor
6.1 The product material shall conform to the requirements
dimensions and shapes available.
prescribed in Table 1 for the specified copper.
6.1.1 Thesespecificationlimitsdonotprecludethepresence 10.2 Billets:
of other elements. Limits may be established and analysis 1
10.2.1 A variation of 65% in weight and/or 6 ⁄16 in.
required for unnamed elements by agreement between the
(62mm)indiameterfromthemanufacturer’spublishedlistor
manufacturer or supplier and the purchaser.
thepurchaser’sspecifiedsizeshallbeconsideredgooddelivery
for billets up to 6 in. (152 mm) in diameter.
7. Physical Property Requirements
1 1
10.2.2 A variation of − ⁄8 in. (−3 mm) to + ⁄16 in. (+2 mm)
7.1 Electrical Resistivity Requirement:
in diameter and 62% in length shall be permitted for billets
7.1.1 The product furnished shall conform to the electrical
6in. (152 mm) and over in diameter.
massresistivityrequirementprescribedinTable2,whentested
10.2.3 Deviation from straightness shall not exceed ⁄4 in.
in accordance with Test Method B193.
(6mm) in 4 ft (1219 mm) as measured at the center of the
billet.
TABLE 2 Electrical Resistivity Requirements for UNS Nos.
10.2.4 Special diameter tolerances are subject to agreement
C10300, C10800, and C12000
between the manufacturer or supplier and the purchaser.
Electrical Resistivity
A
Alloy Conductivity % IACS
10.3 Cakes:
max.Ω.g/m
C10300 0.15614 98.16
10.3.1 A variation up to 5% in weight or ⁄4 in. (6 mm) in
C10800 0.17081 90
any dimension shall be permitted for dimensions up to 8 in.
C12000 0.17081 90
A (203 mm). A variation of 3% in size shall be permitted for
International Annealed Copper Standard.
dimensions greater than 8 in. (203 mm).
B379−20
11. Workmanship, Finish, and Appearance 13.2.2 Retesting shall be as directed in this specification for
the specific property except the number of test specimens shall
11.1 The product shall be free from defects; but blemishes
be twice that normally required for the test. Test results for all
of a nature that do not interfere with the intended application
test specimens shall conform to the requirement(s) of this
areacceptable.Theproductshallbewellcleanedandfreefrom
specification in retest and failure to comply shall be cause for
dirt.
lot rejection.
12. Sampling
14. Specimen Preparation
12.1 The lot size, portion size, and selection of sample
14.1 Chemical Analysis:
pieces shall be as follows:
14.1.1 Preparation of the analytical specimen shall be the
12.1.1 Lot Size—Aninspectionlotshallconsistofallpieces
responsibility of the reporting laboratory.
in a shipment produced during a single production period.
14.2 Electrical Resistivity:
12.1.2 Portion Size—One piece shall be randomly selected
14.2.1 The specimen shall conform to the requirements of
from each 25000 lb (11340 kg) or fraction thereof.
the Test Specimens section of Test Method B193 and at least
12.2 Chemical Composition: two specimens shall be prepared.
14.2.2 Eachtestspecimenshalloriginateasasinglepieceor
12.2.1 The sample for chemical analysis shall be taken in
accordance with Practice E255 from the piece(s) selected in an appropriate size cut from a separate portion piece, when
poss
...

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: B379 − 11 (Reapproved 2018) B379 − 20
Standard Specification for
Phosphorized Coppers—Refinery Shapes
This standard is issued under the fixed designation B379; 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 phosphorized copper wire bars, billets, and cakes.
NOTE 1—Wire bars furnished under this specification do not conform in dimensions with that furnished under Specification B5.
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.
1.3 The following safety hazard caveat pertains only to the test method in 14.2 and 14.3 in this specification.
1.3.1 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.
1.4 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:
B5 Specification for High Conductivity Tough-Pitch Copper Refinery Shapes
B193 Test Method for Resistivity of Electrical Conductor Materials
B224 Classification of Coppers
B577 Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
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
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Withdrawn 2010)
E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
3. Terminology
3.1 For definitions of terms related to copper and copper alloys, refer to Terminology B846.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 copper, oxygen-free—electrolytic copper produced without the use of metallic or metalloidal deoxidizers, free of cuprous
oxide as determined by metallographic examination at 75× under polarized light.
4. Ordering Information
4.1 Contracts or purchase orders for product under this specification should include the following information:
4.1.1 ASTM designation and year of issue (for example, B379 – XX);
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 Nov. 15, 2018April 1, 2020. Published November 2018April 2020. Originally approved in 1962. Last previous edition approved in 20112018
as B379–11. –11 (2018). DOI: 10.1520/B0379–11R18.10.1520/B0379–20.
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
B379 − 20
4.1.2 Copper UNS Number (for example, C10800);
4.1.3 Shape required: wire bar, billet or cake;
4.1.3.1 Billet end type,
4.1.4 Dimensions and tolerances (Section 10); and
4.1.5 Quantity;Quantity: total weight or number of pieces for each shape, size.
4.2 The following are optional and should be specified in the contract or purchase order when required:
4.2.1 Hydrogen embrittlement test (Section 8),
4.2.2 Certification (Section 19), and
4.2.3 Test report (Section 20).
TABLE 1 Chemical Requirements
Composition, %
Copper UNS No. Type Phosphorus Arsenic
Copper (Including
Silver), min
min max min max
A
C10300 OFXLP 99.95 0.001 0.005 . . . . . .
A
C10800 OFLP 99.95 0.005 0.012 . . . . . .
C12000 DLP 99.90 0.004 0.012 . . . . . .
C12200 DHP 99.9 0.015 0.040 . . . . . .
B
C14200 DPA 99.4 0.015 0.040 0.15 0.50
A
Includes phosphorus.
B
Copper (including phosphorus and arsenic) = 99.9 % min.
B379 − 20
5. Materials and Manufacture
5.1 Material:
5.1.1 The product furnished shall be produced from one of the following coppers as specified in the contract or purchase order:
A
UNS Nos. Former Description
C10300 OFXLP Oxygen-free, extra low
phosphorus
C10800 OFLP Oxygen-free, low phosphorus
C12000 DLP Phosphorus deoxidized, low
residual phosphorus
C12200 DHP Phosphorus deoxidized, high
residual phosphorus
C14200 DPA Phosphorus deoxidized, arsenical
A
Refer to Table X1.1 of Classification B224 for former copper designations.
5.2 Manufacture:
5.2.1 Billets—Unless specified otherwise, product up to and including 4 in. (102 mm) in diameter may be supplied sheared on
one end with the other end flat. Billets over 4 in. in diameter shall be supplied with both ends flat. Billets shall not be cupped except
by specific agreement between the manufacturer or supplier and the purchaser at the time of purchase and the agreement shall be
part of the contract or purchase order.
6. Chemical Composition
6.1 The product material shall conform to the requirements prescribed in Table 1 for the specified copper.
6.1.1 These specification limits do not preclude the presence of other elements. Limits may be established and analysis required
for unnamed elements by agreement between the manufacturer or supplier and the purchaser.
7. Physical Property Requirements
7.1 Electrical Resistivity Requirement:
7.1.1 The product furnished shall conform to the electrical mass resistivity requirement prescribed in Table 2, when tested in
accordance with Test Method B193.
7.1.2 The maximum mass resistivity for Copper UNS Nos. C10800 and C12000, in the annealed condition, shall be 0.17081
ohm · g/m (conductivity 90 %, minimum, International Annealed Copper Standard (IACS)) at 68 °F (20 °C).
8. Performance Requirements
8.1 Reverse Bend Test (Hydrogen Embrittlement Susceptibility):
8.1.1 When specified in the contract or purchase order, specimens of product produced of coppers UNS Nos. C10300, C10800,
and C12000 shall be capable of withstanding a minimum of four bends without fracturing when tested in accordance with Test
Method D of the current revision of Test Methods B577.
9. Microscopical Examination
9.1 Coppers UNS Nos. C10300, C10800, and C12000 shall be essentially free of cuprous oxide as determined by examination
in accordance with Test Method A of the current revision of Test Methods B577.
10. Dimensions, Mass, and Permissible Variations
10.1 Wire Bars:
10.1.1 The manufacturer or supplier should be consulted for dimensions and shapes available.
10.2 Billets:
10.2.1 A variation of 65 % in weight and/or 6 ⁄16 in. (62 mm) in diameter from the manufacturer’s published list or the
purchaser’s specified size shall be considered good delivery for billets up to 6 in. (152 mm) in diameter.
1 1
10.2.2 A variation of − ⁄8 in. (−3 mm) to + ⁄16 in. (+2 mm) in diameter and 62 % in length shall be permitted for billets 6 in.
(152 mm) and over in diameter.
TABLE 2 Electrical Resistivity Requirements for UNS Nos.
C10300, C10800, and C12000
Electrical Resistivity
A
Alloy Conductivity % IACS
max. Ω.g/m
C10300 0.15614 98.16
C10800 0.17081 90
C12000 0.17081 90
A
International Annealed Copper Standard.
B379 − 20
10.2.3 Deviation from straightness shall not exceed ⁄4 in. (6 mm) in 4 ft (1219 mm) as measured at the center of the billet.
10.2.4 Special diameter tolerances are subject to agreement between the manufacturer or supplier and the purchaser.
10.3 Cakes:
10.3.1 A variation up to 5 % in weight or ⁄4 in. (6 mm) in any dimension shall be permitted for dimensions up to 8 in. (203
mm). A variation of 3 % in size shall be permitted for dimensions greater than 8 in. (203 mm).
11. Workmanship, Finish, and Appearance
11.1 The product shall be free from defects; but blemishes of a nature that do not interfere with the intended application are
acceptable. The product shall be well cleaned and free from dirt.
12. Sampling
12.1 The lot size, portion size, and selection of sample pieces shall be as follows:
12.1.1 Lot Size—An inspection lot shall consist of all pieces in a shipment produced during a single production period.
12.1.2 Portion Size—One piece shall be randomly selected from each 25 000 lb (11 340 kg) or fraction thereof.
12.2 Chemical Composition:
12.2.1 The sample for chemical analysis shall be taken in accordance with Practice E255 from the piece(s) selected in 12.1.2.
The minimum weight of the composite sample shall be ⁄3 lb (150 g).
12.2.2 Instead of sampling in accordance with Practice E255, the manufacturer shall have the option of determining
composition from samples taken at the time the castings are poured or from samples taken from semifinished product. When the
manufacturer determines chemical composition during the course of manufacture, sampling of the finished product by the
manufacturer is not required. The number of samples to be taken for the determination of chemical composition shall be as follows:
12.2.2.1 When castings are poured, at least two samples shall be taken, one at the beginning of the pour and one at the end of
the pour, for each group of castings poured from the same source of molten metal.
12.2.2.2 When taken from semifinished product, at least two samples shall be taken, ea
...