ASTM B743-23

Standard Specification for Seamless Copper Tube in Coils

ABSTRACT
This standard specification establishes the requirements for seamless copper tube coils, suitable for use in refrigeration and air conditioning or other uses, such as oil lines and gasoline lines. The material of manufacture shall be cast billet, bar, tube and so forth of Copper Alloys No. C10200, C10300, C10800, C12000, or C12200. The tube shall be manufactured by such hot and cold working processes needed to produce a homogeneous, uniform wrought structure. The tube shall be cold drawn to the prescribed finish size and wall thickness. When the cold-drawn temper is required, the final drawing operation shall conform to the specified temper properties. When the annealed temper is required, the tube shall be annealed after the final cold draw to the specified temper properties. The product shall conform to the prescribed electrical mass resistivity, tensile strength, yield strength, Rockwell hardness, and expansion. Each tube shall be subjected to an eddy-current test. Particular coppers shall be tested to meet the cuprous oxide, embrittlement, and cleanness requirements.
SCOPE
1.1 This specification establishes the requirements for seamless copper tube in coils, suitable for use in refrigeration and air conditioning or other uses, such as oil lines and gasoline lines.  
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 tube shall be produced of the following coppers:    
Copper Alloy
UNS No.  
Previously Used
Designation  
Type of Copper  
C10200  
OF  
Oxygen-free without residual deoxidantsA  
C10300  
...  
Oxygen-free, extra low phosphorusA  
C10800  
...  
Oxygen-free, low phosphorusA  
C12000  
DLP  
Phosphorized, low residual phosphorus  
C12200  
DHP  
Phosphorized, high residual phosphorus  
1.4 The following safety hazards caveat pertains to the test method portion, Section 17, of this specification. 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.  
1.5 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.

General Information

• Status: Published
• Publication Date: 31-Mar-2023
• ICS: 77.150.30 - Copper products
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.04 - Pipe and Tube

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: B743 − 23
Standard Specification for
1
Seamless Copper Tube in Coils
This standard is issued under the fixed designation B743; 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* B153 Test Method for Expansion (Pin Test) of Copper and
Copper-Alloy Pipe and Tubing
1.1 This specification establishes the requirements for seam-
B193 Test Method for Resistivity of Electrical Conductor
less copper tube in coils, suitable for use in refrigeration and air
Materials
conditioning or other uses, such as oil lines and gasoline lines.
B224 Classification of Coppers
1.2 Units—The values stated in inch-pound units are to be
B251 Specification for General Requirements for Wrought
regarded as standard. The values given in parentheses are
Seamless Copper and Copper-Alloy Tube (Metric) B0251
mathematical conversions to SI units that are provided for
_B0251M
information only and are not considered standard.
B577 Test Methods for Detection of Cuprous Oxide (Hydro-
gen Embrittlement Susceptibility) in Copper
1.3 The tube shall be produced of the following coppers:
B601 Classification for Temper Designations for Copper and
Copper Alloy Previously Used
UNS No. Designation Type of Copper Copper Alloys—Wrought and Cast
B846 Terminology for Copper and Copper Alloys
A
C10200 OF Oxygen-free without residual deoxidants
A B950 Guide for Editorial Procedures and Form of Product
C10300 . Oxygen-free, extra low phosphorus
A
C10800 . Oxygen-free, low phosphorus
Specifications for Copper and Copper Alloys
C12000 DLP Phosphorized, low residual phosphorus
E3 Guide for Preparation of Metallographic Specimens
C12200 DHP Phosphorized, high residual phosphorus
E8/E8M Test Methods for Tension Testing of Metallic Ma-
A terials
See Classification B224.
E18 Test Methods for Rockwell Hardness of Metallic Ma-
1.4 The following safety hazards caveat pertains to the test
terials
method portion, Section 17, of this specification. This standard
E29 Practice for Using Significant Digits in Test Data to
does not purport to address all of the safety concerns, if any,
Determine Conformance with Specifications
associated with its use. It is the responsibility of the user of this
E53 Test Method for Determination of Copper in Unalloyed
standard to establish appropriate safety, health, and environ-
3
Copper by Gravimetry (Withdrawn 2022)
mental practices and determine the applicability of regulatory
E62 Test Methods for Chemical Analysis of Copper and
limitations prior to use.
3
Copper Alloys (Photometric Methods) (Withdrawn 2010)
1.5 This international standard was developed in accor-
E112 Test Methods for Determining Average Grain Size
dance with internationally recognized principles on standard-
E243 Practice for Electromagnetic (Eddy Current) Examina-
ization established in the Decision on Principles for the
tion of Copper and Copper-Alloy Tubes
Development of International Standards, Guides and Recom-
E255 Practice for Sampling Copper and Copper Alloys for
mendations issued by the World Trade Organization Technical
the Determination of Chemical Composition (Withdrawn
Barriers to Trade (TBT) Committee.
3
2023)
E2575 Test Method for Determination of Oxygen in Copper
2. Referenced Documents
and Copper Alloys by Inert Gas Fusion
2
2.1 ASTM Standards:
3. General Requirements
1 3.1 The following sections of Specification B251 constitute
This specification is under the jurisdiction of ASTM Committee B05 on Copper
and Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipe
a part of this specification:
and Tube.
3.1.1 Sampling,
Current edition approved April 1, 2023. Published May 2023. Originally
3.1.2 Number of tests and retests,
approved in 1985. Last previous edition approved in 2020 as B743 – 12 (2020).
3.1.3 Dimensions and permissible variations,
DOI: 10.1520/B0743-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
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
1

---------------------- Page: 1 ----------------------
B743 − 23
TABLE 1 Chemical Requirem
...

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: B743 − 12 (Reapproved 2020) B743 − 23
Standard Specification for
1
Seamless Copper Tube in Coils
This standard is issued under the fixed designation B743; 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 seamless copper tube in coils, suitable for use in refrigeration and air
conditioning or other uses, such as oil lines and gasoline lines.
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 tube shall be produced of the following coppers. Unless otherwise specified, tubes made from any one of these coppers
may be supplied:coppers:
Copper Alloy Previously Used
UNS No. Designation Type of Copper
A
C10200 OF Oxygen-free without residual deoxidants
A
C10300 . Oxygen-free, extra low phosphorus
A
C10800 . Oxygen-free, low phosphorus
C12000 DLP Phosphorized, low residual phosphorus
C12200 DHP Phosphorized, high residual phosphorus
A
See Classification B224.
1.4 The following safety hazards caveat pertains to the test method portion, Section 17, of this specification. 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.
1.5 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
2.1 ASTM Standards:
B153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing
B170 Specification for Oxygen-Free Electrolytic Copper—Refinery Shapes
B193 Test Method for Resistivity of Electrical Conductor Materials
1
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipe and
Tube.
Current edition approved Oct. 1, 2020April 1, 2023. Published October 2020May 2023. Originally approved in 1985. Last previous edition approved in 20122020 as
B743 – 12.B743 – 12 (2020). DOI: 10.1520/B0743-12R20.10.1520/B0743-23.
2
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.
*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
1

---------------------- Page: 1 ----------------------
B743 − 23
B224 Classification of Coppers
B251 Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube (Metric) B0251_B0251M
B577 Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
B601 Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
B846 Terminology for Copper and Copper Alloys
E2B950 Methods of Preparation of Micrographs of Metals and Alloys (Including Recommended Practice for Photography As
Applied to Metallography); Replaced by E 883Guide for Editorial Procedures and Form of Product Specifications for Copper
and Copper Alloys (Withdrawn 1983)
E3 Guide for Preparation of Metallographic Specimens
E8/E8M Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3
E53 Test Method for Determination of Copper in Unalloyed Copper by Gravimetry (Withdrawn 2022)
3
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Withdrawn 2010)
E112 Test Methods for Determining Average Grain Size
E243 Practice for Electromagnetic (Eddy Current) Examination of Copper and Copper-Alloy Tubes
3
E255
...