ASTM B543 - B 543M - 18

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Designation: B543/B543M −18
Standard Speciﬁcation for
Welded Copper and Copper-Alloy Heat Exchanger Tube
1
This standard is issued under the ﬁxed designation B543/B543M; 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
welded tube of copper and various copper alloys up to 3
1
⁄
8
in.,
inclusive, in diameter, for use in surface condensers,
evaporators, heat exchangers, and general engineering appli-
cations. The following coppers or copper alloys are involved:
2
Copper or
Copper Alloy UNS
No.
2
Previously Used
Designation Type of Metal
C10800
A
... oxygen-free, low phosphorus
C12200
A
... DHP phosphorized, high
residual phosphorus
C19400 ... copper-iron alloy
C23000 ... red brass
C44300 ... arsenical admiralty
C44400 ... antimonial admiralty
C44500 ... phosphorized admiralty
C68700 ... arsenical aluminum brass
C70400 ... 95-5 copper-nickel
C70600 ... 90-10 copper-nickel
C70620 ... 90-10 copper-nickel (Modiﬁed
for Welding)
C71000 ... 80-20 copper-nickel
C71500 ... 70-30 copper-nickel
C71520 ... 70-30 copper-nickel (Modiﬁed
for Welding)
C71640 ... copper-nickel-iron-manganese
C72200 ... ...
A
Copper UNS Nos. C10800 and C12200 are classiﬁed in Classiﬁcation B224.
1.2 The values stated in either inch-pound or SI units are to
be regarded separately as standard. Within the text, SI units are
shown in brackets. The values stated in each system may not be
exact equivalents; therefore, each system shall be used inde-
pendently of the other. Combining values from the two systems
may result in non-conformance with the standard.
1.3 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 appro-
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
(Warning—Mercury has been designated by many regulatory
agencies as a hazardous substance that can cause serious
medical issues. Mercury, or its vapor, has been demonstrated to
be hazardous to health and corrosive to materials. Use caution
when handling mercury and mercury-containing products. See
the applicable product Safety Data Sheet (SDS) for additional
information. The potential exists that selling mercury or
mercury-containing products, or both, is prohibited by local or
national law. Users must determine legality of sales in their
location.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
3
B153 Test Method for Expansion (Pin Test) of Copper and
Copper-Alloy Pipe and Tubing
B154 Test Method for Mercurous Nitrate Test for Copper
Alloys
B224 Classiﬁcation of Coppers
B846 Terminology for Copper and Copper Alloys
B858 Test Method for Ammonia Vapor Test for Determining
Susceptibility to Stress Corrosion Cracking in Copper
Alloys
B900 Practice for Packaging of Copper and Copper Alloy
Mill Products for U.S. Government Agencies
B968/B968M Test Method for Flattening of Copper and
Copper-Alloy Pipe and Tube
E3 Guide for Preparation of Metallographic Specimens
E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
E29 Practice for Using Signiﬁcant Digits in Test Data to
Determine Conformance with Speciﬁcations
E53 Test Method for Determination of Copper in Unalloyed
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, 2018. Published October 2018. Originally
approved in 1970. Last previous edition approved in 2012 as B543/B543M–12.
DOI: 10.1520/B0543/B0543M–18.
2
New designation established in accordance with Practice E527. In the new UNS
system, the designations for copper alloys are simply expansions of the present
standard designations by a preﬁx “C” and a suffix “00.”
3
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’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
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.
1
 

Copper by Gravimetry
E54 Test Methods for Chemical Analysis of Special Brasses
and Bronzes (Withdrawn 2002)
4
E62 Test Methods for Chemical Analysis of Copper and
Copper Alloys (Photometric Methods) (Withdrawn 2010)
4
E112 Test Methods for Determining Average Grain Size
E118 Test Methods for Chemical Analysis of Copper-
Chromium Alloys (Withdrawn 2010)
4
E243 Practice for Electromagnetic (Eddy Current) Examina-
tion of Copper and Copper-Alloy Tubes
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)
2.2 ASME Standard:
5
ASME Boiler and Pressure Vessel Code
3. Terminology
3.1 For the deﬁnitions of the terms related to copper and
copper alloys, refer to Terminology B846.
4. Types of Welded Tube
4.1 Forge-Welded Tube manufactured as described in
6.2.2.1,6.2.2.2, and 6.2.2.3.
4.1.1 As-Welded Tube—Forge-welded tube with internal and
external ﬂash removed and no further reﬁnement of grain
structure.
4.1.2 Welded and Annealed Tube—Forge-welded tube with
internal and external ﬂash removed, that has been annealed to
produce a uniform grain size appropriate to the speciﬁed
annealed temper.
4.1.3 Welded and Cold-Reduced Tube—Forge-welded tube
with internal and external ﬂash removed and subsequently
cold-reduced to conform to the speciﬁed size and temper.
4.1.4 Welded and Cold-Drawn Tube—Forge-welded tube
with internal and external ﬂash removed and subsequently
cold-drawn over a plug or mandrel to the speciﬁed size and
temper.
4.2 Fusion-Welded Tube manufactured as described in sec-
tion 6.3.
4.2.1 As-Welded Tube—Fusion-welded tube with no further
reﬁnement of grain structure.
4.2.2 Welded and Annealed Tube—Fusion-welded tube that
has been annealed to produce a uniform grain size appropriate
to the speciﬁed annealed temper. The structure of the weld zone
shall be that which is typical of a fusion weld.
4.2.3 Welded and Cold-Reduced Tube—Fusion-welded tube
subsequently cold-reduced to conform to the speciﬁed size and
temper.
4.2.4 Welded and Cold-Drawn Tube—Fusion-welded tube
subsequently cold-drawn over a plug or mandrel to the
speciﬁed size and temper.
4.3 Fully Finished Tube—Welded tube with internal and
external ﬂash removed, if present, and subsequently cold-
drawn over a plug or mandrel and annealed, and redrawn when
necessary to conform to the speciﬁed temper.
5. Ordering Information
5.1 Include the following information when placing orders
for product under this speciﬁcation, as applicable:
5.1.1 ASTM designation and year of issue;
5.1.2 Copper or Copper Alloy UNS No. designation (for
example, UNS No. C10800);
5.1.3 Tube type (Section 4);
5.1.4 Temper (Section 8);
5.1.5 Dimensions, the diameter, wall thickness, whether
minimum or nominal wall, and length, (Section 14); and
5.1.6 Quantity of each size (number of pieces and length, in
inches or feet and inches);
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 When heat identiﬁcation or traceability details;
5.2.2 Whether a pressure test is to be used instead of the
eddy-current test (Section 13.1);
5.2.3 Whether cut ends of the tube are to be deburred,
chamfered, or otherwise treated (Section 15);
5.2.4 If the product is to be subsequently welded, (see Table
1, Footnote F);
5.2.5 Certiﬁcation, if required (Section 23); and
5.2.6 Mill test report, if required (Section 24).
5.3 If product is purchased for agencies of the U.S. Gov-
ernment (see the Supplementary Requirements section of {this
speciﬁcation or the general requirements section} for addi-
tional requirements, if speciﬁed), and
5.3.1 If product is ordered for ASME Boiler and Pressure
Vessel Code application (see Certiﬁcation Section 23).
6. Materials and Manufacture
6.1 Materials:
6.1.1 The material of manufacture shall be strip of one of
the Copper Alloy UNS Nos. listed in section 1.1 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.
6.2 Manufacture:
6.2.1 The product shall be manufactured by forming the
material into a tubular shape on a suitable forming mill.
6.2.2 Welding shall be accomplished by any process that
produces a forge weld leaving no crevice in the weld seam
visible to the unaided eye.
6.2.2.1 Forge-Welded Tube—The edges of the strip shall be
heated to the required welding temperature, usually by high
frequency electric current, and be pressed ﬁrmly together
causing a forge-type joint to be formed with internal and
external ﬂash or bead.
6.2.2.2 The external ﬂash (that portion of the weld which
extends beyond the normal wall) shall always be removed.
4
The last approved version of this historical standard is referenced on
www.astm.org.
5
Available from American Society of Mechanical Engineers (ASME), ASME
International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
B543/B543M − 18
2
 

6.2.2.3 The internal ﬂash shall be removed to the extent that

it shall not exceed 0.006 in. [0.152 mm] in height or 10 % of

the nominal wall thickness, whichever is greater.

6.3 Fusion-Welded Tube—The edges of the strip shall be

brought together and welded, usually by a GTAW welding

process, without the addition of ﬁller metal, causing a fusion-

type joint to be formed with no internal or external ﬂash or

bead removal necessary.

6.4 Fully Finished Tube—May be welded and subsequently

processed by any method that would produce a tube suitable

for subsequent cold-drawing and annealing.

6.5 There shall be no crevice in the weld seam visible to the

unaided eye.

7. Chemical Composition

7.1 The material shall conform to the chemical composi-

tional requirements in Table 1 for the Copper or Copper Alloy

UNS No. designation speciﬁed in the ordering information.

7.2 The 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 For copper alloys in which copper is speciﬁed as the

remainder, copper may be taken as the difference between the

sum of all the elements analyzed and 100 %.

7.3.1 Copper Alloy UNS Nos. C70400, C70600, C70620,

C71000, C71500, and C71640—When all the elements in

Table 1 are analyzed, their sum shall be 99.5 % minimum.

7.3.2 Copper Alloy UNS No. C72200—When all the ele-

ments in Table 1 are analyzed, their sum shall be 99.8 %

minimum.

7.4 For copper alloys in which zinc is speciﬁed as the

remainder, either copper or zinc may be taken as the difference

between the sum of all the elements analyzed and 100 %.

7.4.1 Copper Alloy UNS No. C23000—When all the ele-

ments in Table 1 are analyzed, their sum shall be 99.8 %

minimum.

7.4.2 Copper Alloy UNS Nos. C44300, C44400, and

C44500—When all the elements in Table 1 are analyzed, their

sum shall be 99.6 % minimum.

7.4.3 Copper Alloy UNS No. C68700—When all the ele-

ments in Table 1 are analyzed, their sum shall be 99.5 %

minimum.

8. Temper

8.1 Tube tempers shall be designated as follows:

8.1.1 Welded and annealed WO61.

8.1.1.1 Welded and light cold worked WC55.

8.2 Other tempers shall be produced to the mechanical

properties as agreed upon between the manufacturer or supplier

and the purchaser.

8.3 Tubes of Copper Alloy UNS Nos. C23000, C44300,

C44400, C44500, and C68700 shall be furnished in the

annealed temper or the stress-relieved condition as speciﬁed in

the purchase order unless otherwise agreed upon between the

purchaser and the manufacturer or supplier.

TABLE 1 Chemical Requirements

Copper or

Copper Al-

loy UNS No.

Composition, %

Copper

Nickel incl

Cobalt

Lead,

max Iron Zinc Man-

ganese Aluminum Phosphorus Tin Antimony Arsenic Other

Elements

C10800 99.95

A, B

min ... ... ... ... ... ... 0.005–0.012 ... ... ... ...

C12200 99.9

min ... ... ... ... ... ... 0.015–0.040 ... ... ... ...

C19400 97.0 min ... 0.03 2.1–2.6 0.05–0.20 ... ... 0.015–0.15 ... ... ... ...

C23000 84.0–86.0

C, D

... 0.05 0.05 max remainder ... ... ... ... ... ... ...

C44300 70.0–73.0 ... 0.07 0.06 max remainder ... ... ... 0.8–1.2

... 0.02–0.06 ...

C44400 70.0–73.0 ... 0.07 0.06 max remainder ... ... ... 0.8–1.2

0.02–0.10 ... ...

C44500 70.0–73.0 ... 0.07 0.06 max remainder ... ... 0.02–0.10 0.8–1.2

... ... ...

C68700 76.0–79.0

A, F

... 0.07 0.06 max remainder ... 1.8–2.5 ... ... ... 0.02–0.06 ...

C70400 remainder

A, F

4.8–6.2 0.05 1.3–1.7 1.0 max 0.30–0.8 ... ... ... ... ... ...

C70600 remainder

A, F

9.0–11.0 0.05 1.0–1.8 1.0 max 1.0 max ... ... ... ... ... ...

C70620 86.5 min

A, F

9.0–11.0 0.02 1.0–1.8 0.50 max 1.0 ... 0.02 max ... ... ... C 0.05 max

S0.02max

C71000 remainder

A, F, G

19.0–23.0 0.05 0.50–1.0 1.0 max

1.0 max ...

... ... ...

C71500 remainder

A, F

29.0–33.0 0.05 0.40–1.0 1.0 max 1.0 max ... ... ... ... ...

C71520 65.0 min

A, F

29.0–33.0 0.02 0.40–1.0 0.50 max 1.0 max ... 0.02 max ... ... ... C 0.05 max

S0.02max

C71640 remainder

A, F, G

29.0–32.0 0.05

1.7–2.3 1.0 max

1.5–2.5 ...

... ... ... C 0.06

max

S0.03max

C72200 remainder

A, C, G, H

15.0–18.0 0.05

0.50–1.0 1.0 max

1.0 max ...

... ... ...

Si 0.03

max

Ti 0.03

max

Cu value includes Ag.

Copper + silver + phosphorus.

Cu + Sum of Named Elements, 99.8 % min.

Not including Ag.

For tubular products, the minimum Sn content may be 0.9 %

Cu + Sum of Named Elements, 99.5 % min.

When the product is for subsequent welding applications and so speciﬁed by the purchaser, zinc shall be 0.50 % max, lead 0.02 % max, phosphorus 0.02 % max, sulfur

0.02 % max, and carbon 0.05 % max.

Chromium 0.30 to 0.7.

B543/B543M − 18

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摘要：

ASTM B543 - B 543M - 18 是国际材料与试验协会（ASTM）发布的标准规范，适用于焊接铜及铜合金管材，涵盖通用工程、热交换器及冷凝器等领域。该标准详细规定了管材的化学成分、力学性能、尺寸公差、制造工艺及检测要求，包括水压试验、涡流探伤等质量控制手段，旨在确保产品在高温、腐蚀性环境下的可靠性与耐久性。适用于公制（B543M）与英制（B543）单位体系，便于全球工程设计与采购引用。制造商、工程师和采购方可据此评估管材是否满足特定应用需求，如船舶、电力、化工设备等行业的管道系统。通

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