ASTM B927/B927M-23

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: B927/B927M − 17 B927/B927M − 23
Standard Specification for
Brass Rod, Bar, and Shapes
This standard is issued under the fixed designation B927/B927M; 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 requirements for brass rod (round, hexagonal, and octagonal), bar (rectangular and square), and
shapes of UNS Alloys C21000, C22000, C23000, C24000, C26000, C26800, C27000, C27400, C27450, C27451, C27453,
C27550, and C28500.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from
the two systems may result in non-conformance with the standard.
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:
B16/B16M Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw Machines
B36/B36M Specification for Brass Plate, Sheet, Strip, And Rolled Bar
B121/B121M Specification for Leaded Brass Plate, Sheet, Strip, and Rolled Bar
B124/B124M Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes
B134/B134M Specification for Brass Wire
B135 Specification for Seamless Brass Tube [Metric] B0135_B0135M
B249/B249M Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
B587 Specification for Welded Brass Tube
E8/E8M Test Methods for Tension Testing of Metallic Materials
E54 Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Withdrawn 2010)
E478 Test Methods for Chemical Analysis of Copper Alloys
E562 Test Method for Determining Volume Fraction by Systematic Manual Point Count
2.2 JIS Standard:
JIS H 1068:2005 Method for Determination of Bismuth in Copper and Copper Alloys
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod, Bar,
Wire, Shapes and Forgings.
Current edition approved April 1, 2017Oct. 1, 2023. Published April 2017October 2023. Originally approved in 2003. Last previous edition approved in 20132017 as
B927/B927M – 13.B927/B927M – 17. DOI: 10.1520/B0927_B0927M-17.10.1520/B0927_B0927M-23.
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.
The last approved version of this historical standard is referenced on www.astm.org.
Available from Japanese Standards Association (JSA), Mita MT Bldg., 3-13-12 Mita, Minato-ku, Tokyo 108-0073, Japan, http://www.jsa.or.jp.
*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
B927/B927M − 23
3. General Requirements
3.1 The following sections of Specification B249/B249M constitute a part of this specification:
3.1.1 Terminology,
3.1.2 Materials and Manufacture,
3.1.3 Workmanship, Finish, and Appearance,
3.1.4 Sampling,
3.1.5 Number of Tests and Retests,
3.1.6 Specimen Preparation,
3.1.7 Test Methods,
3.1.8 Significance of Numerical Limits,
3.1.9 Inspection,
3.1.10 Rejection and Rehearing,
3.1.11 Certification,
3.1.12 Mill Test Reports,
3.1.13 Product Marking,
3.1.14 Packaging and Package Marking, and
3.1.15 Supplementary Requirements.
3.2 In addition, when a section with a title identical to that referenced in 3.1, above, appears in this specification, it contains
additional requirements that supplement those that appear in Specification B249/B249M.
4. Ordering Information
4.1 Include the following information when placing orders for product under this specification, as applicable:
4.1.1 ASTM Designation and year of issue,
4.1.2 Copper Alloy UNS No. designation,
4.1.3 Temper,
4.1.4 Cross section (round, hexagonal, octagonal, rectangular, or square),
4.1.5 Quantity (total weight, footage, or number of pieces of each temper, cross section, and alloy),
4.1.6 Dimensions (diameter or distance between parallel surfaces, width and thickness, length),
4.1.7 Type of edge (square corners, rounded edge, full-rounded edge),
4.1.8 How furnished (specific lengths with or without ends), and
4.1.9 If product is purchased for agencies of the U.S. Government (Specification B249/B249M).
B927/B927M − 23
4.2 The following requirements are available to this specification and should be specified in the contract or purchase order when
required:
4.2.1 Certification (Specification B249/B249M), and
4.2.2 Mill Test Report (Specification B249/B249M).
5. Materials and Manufacture
5.1 Materials:
5.1.1 The material of manufacture shall be cast billets, logs, or rods of Copper Alloy UNS Nos. C21000, C22000, C23000,
C24000, C26000, C26800, C27000, C27400, C27450, C27451, C27453, C27550, and C28500 of such purity, soundness, and
structure as to be suitable for processing into the products prescribed herein.
5.2 Manufacture:
5.2.1 The products shall be manufactured by such hot working, cold working, and annealing processing as to produce a uniform
wrought structure in the finished product.
6. Chemical Composition
6.1 The material shall conform to the chemical composition requirements in Table 1 for the copper alloy UNS No. designation
specified in the ordering information.
6.2 These composition limits do not preclude the presence of other elements. By agreement between the manufacturer and the
purchaser, limits may be established and analysis required for unnamed elements.
6.3 For alloys in which zinc is listed as “remainder,” either copper or zinc may be taken as the difference between the sum of
results of all other elements determined and 100 %.
6.4 When all elements specified for a given alloy in Table 1 are determined, the sum of the results shall be as shown in the
following table:
Sum of Results,
Alloy UNS Nos.
Percent, Minimum
C21000, C22000, C23000, C24000 99.8
C26000, C26800, C27000, C27400 99.7
C27450, C27451, C27453 99.5
C27450, C27451, C27453, C27550 99.5
C28500 99.1
TABLE 1 Chemical Requirements
Composition, %
Copper Alloy
Iron, Bismuth, Silicon,
UNS No.
Copper Lead, max Tin, max Phosphorous Arsenic Carbon Zinc
max max max
C21000 94.0-96.0 0.05 0.05 . . . . . . remainder
C22000 89.0-91.0 0.05 0.05 . . . . . . remainder
C23000 84.0-86.0 0.05 0.05 . . . . . . remainder
C24000 78.5-81.5 0.05 0.05 . . . . . . remainder
C26000 68.5-71.5 0.07 0.05 . . . . . . remainder
C26800 64.0-68.5 0.09 0.05 . . . . . . remainder
C27000 63.0-68.5 0.09 0.07 . . . . . . remainder
C27400 61.0-64.0 0.09 0.05 . . . . . . remainder
C27450 60.0-65.0 0.25 0.35 . . . . . . remainder
C27451 61.0-65.0 0.25 0.35 . 0.05-0.20 . . . . remainder
C27453 61.5–63.5 0.25 0.15 0.15 . 0.02–0.15 . . . remainder
C27550 60.0-63.0 0.04 0.35 . 0. 40 (max) . 0.20-1.2 0.009 0.009 remainder
C28500 57.0–59.0 0.25 0.35 . . . . . . remainder
B927/B927M − 23
7. Temper
7.1 The standard tempers for rod and bar described in this specification are given in Tables 2 and 3.
7.1.1 O60 (Soft Anneal),
7.1.2 H01 ( ⁄4 Hard),
7.1.3 H02 ( ⁄2 Hard), and
7.1.4 H04 (Hard).
7.2 Other tempers, and temper for shapes, shall be subject to agreement between the manufacturer and the purchaser.
8. Mechanical Property Requirements
8.1 Tensile Strength Requirements:
8.1.1 Product furnished under this specification shall conform to the tensile requirements prescribed in Tables 2 and 3, when tested
in accordance with Test Methods E8/E8M.
9. Purchases for U.S. Government
9.1 When specified in the contract or purchase order, product purchased for agencies of the U.S. government shall conform to the
special government requirements stipulated in the Supplementary Requirements section of Specification B249/B249M.
10. Dimensions and Permissible Variations
10.1 The dimensions and tolerances for rod, bar, and shapes described by this specification shall be as specified in Specification
B249/B249M with particular reference to the following tables and related paragraphs.
10.1.1 Diameter or Distance Between Parallel Surfaces:
10.1.1.1 Rod—Table 1.
10.1.1.2 Bar—Tables 8 and 10.
10.1.2 Shapes—Dimensional tolerances shall be subject to agreement between the manufacturer and the purchaser.
10.1.3 Length—Tables 13 and 14.
10.1.4 Straightness—Table 16—General Use section.
10.1.5 Edge contours—Paragraph 6.5.
B927/B927M − 23
TABLE 2 Tensile Requirements (Inch-Pound Units)
A
Diameter or Yield Strength at
Elongation in
Tensile Strength,
Temper Distance Between 0.5 % Extension 4× diameter or
min
4× thickness, min
Parallel Surfaces, in. Under Load, min
Code Name ksi ksi %
Copper Alloy UNS No. C21000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 30 10 25
1 1
H01 ⁄4 Hard Under ⁄2 36 16 15
⁄2 to 1, incl 34 14 17
over 1 32 12 19
1 1
H02 ⁄2 Hard Under ⁄2 42 25 8
⁄2 to 1, incl 40 23 9
over 1 37 20 11
H04 Hard Under ⁄2 52 40 5
⁄2 to 1, incl 48 37 7
over 1 to 2 incl 45 35 9
B
Copper Alloy UNS No. C21000 Bar
O60 Soft Anneal All sizes 30 10 25
1 1
H01 ⁄4 Hard Under ⁄2 34 14 17
⁄2 to 2, incl 32 12 19
Copper Alloy UNS No. C22000 Rod (round, hexagonal, octagonal)
060 Soft Anneal All sizes 32 10 25
1 1
H01 ⁄4 Hard Under ⁄2 39 20 15
⁄2 to 1, incl 37 17 17
over 1 34 15 19
1 1
H02 ⁄2 Hard Under ⁄2 50 30 7
⁄2 to 1, incl 45 27 10
over 1 40 25 12
H04 Hard Under ⁄2 57 40 5
⁄2 to 1, incl 55 37 7
over 1 to 2 incl 50 35 9
B
Copper Alloy UNS No. C22000 Bar
O60 Soft Anneal All sizes 32 10 25
1 1
H01 ⁄4 Hard Under ⁄2 35 16 17
⁄2 to 2, incl 34 15 19
Copper Alloy UNS No. C23000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 35 10 25
1 1
H01 ⁄4 Hard Under ⁄2 44 20 15
⁄2 to 1, incl 42 17 17
over 1 40 15 19
1 1
H02 ⁄2 Hard Under ⁄2 50 30 7
⁄2 to 1, incl 45 27 10
over 1 40 25 12
H04 Hard Under ⁄2 63 40 5
⁄2 to 1, incl 60 37 7
over 1 to 2 incl 58 35 9
B
Copper Alloy UNS No. C23000 Bar
O60 Soft Anneal All sizes 35 10 25
H01 ⁄4 Hard Under ⁄2 40 15 19
⁄2 to 1, incl 38 13 22
over 1 to 2 incl 36 11 25
1 1
H02 ⁄2 Hard Under ⁄2 44 20 15
⁄2 to 1, incl 42 17 17
over 1 to 2 incl 40 15 19
Copper Alloy UNS No. C24000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 40 10 30
1 1
H01 ⁄4 Hard Under ⁄2 47
...