ASTM B16-B 16M-24 制螺钉机用易切削黄铜条材、棒材和型材

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Designation: B16/B16M −24
Standard Speciﬁcation for
Free-Cutting Brass Rod, Bar and Shapes for Use in Screw
Machines
1
This standard is issued under the ﬁxed designation B16/B16M; 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 covers the requirements for free-
cutting brass rod, bar, wire, and shapes of any speciﬁed cross
section produced from Copper Alloy UNS Nos. C36000 or
C36010 suitable for high-speed screw machining applications
and moderate thread rolling.
1.2 Units—Values stated in either SI units or inch-pound
units are to be regarded separately as standard. Within the text,
SI units are shown in brackets. The values stated in each
system are not necessarily exact equivalents; therefore, to
ensure conformance with the standard, each system shall be
used independently of the other and values from the two
systems shall not be combined.
1.3 The following safety hazard caveat pertains only to the
test method(s) described in 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 environ-
mental practices and determine the applicability of regulatory
limitations prior to use.
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:
2
B249/B249M Speciﬁcation for General Requirements for
Wrought Copper and Copper-Alloy Rod, Bar, Shapes and
Forgings
B250/B250M Speciﬁcation for General Requirements for
Wrought Copper Alloy Wire
B846 Terminology for Copper and Copper Alloys
B950 Guide for Editorial Procedures and Form of Product
Speciﬁcations for Copper and Copper Alloys
E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
E18 Test Methods for Rockwell Hardness of Metallic Ma-
terials
E478 Test Methods for Chemical Analysis of Copper Alloys
3. Terminology
3.1 For deﬁnitions of terms related to copper and copper
alloys, refer to Terminology B846.
4. General Requirements
4.1 The following sections of Speciﬁcations B249/B249M
(rod, bar, and shapes) and B250/B250M (wrought copper alloy
wire) constitute a part of this speciﬁcation.
4.1.1 Terminology;
4.1.2 Materials and Manufacture;
4.1.3 Workmanship, Finish, and Appearance;
4.1.4 Sampling;
4.1.5 Number of Tests and Retest;
4.1.6 Specimen Preparation;
4.1.7 Test Methods;
4.1.8 Signiﬁcance of Numerical Limits;
4.1.9 Inspection;
4.1.10 Rejection and Rehearing;
4.1.11 Certiﬁcation;
4.1.12 Test Report;
4.1.13 Packaging and Package Marking; and
4.1.14 Supplementary Requirements.
4.2 In addition, when a section with a title identical to those
referenced in 4.1, above, appears in this speciﬁcation, it
contains additional requirements which supplement those ap-
pearing in Speciﬁcations B249/B249M and B250/B250M.
1
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 July 1, 2024. Published July 2024. Originally approved
in 1917. Last previous edition approved in 2019 as B16/B16M – 19. DOI:
10.1520/B0016_B0016M-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at www.astm.org/contact. 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

5. Ordering Information
5.1 Include the following speciﬁed choices when placing
orders for product under this speciﬁcation, as applicable:
5.1.1 ASTM designation and year of issue.
5.1.2 Copper Alloy UNS No. C36000 or C36010. Unless
otherwise speciﬁed, the alloy supplied will be UNS No.
C36000.
5.1.3 Temper (see Section 8and Tables 2-5).
5.1.4 Product cross section form (for example, round,
hexagonal, square, etc.).
5.1.5 Dimensions by diameter or distance between parallel
surfaces (see Section 10).
5.1.6 How furnished; straight lengths or coils (see 6.2).
5.1.7 Edge contours (see Section 10).
5.1.8 Quantity; total weight or total length or number of
pieces of each size.
5.1.9 When product is purchased for applications requiring
thread rolling (see 1.1,Tables 2-5).
5.1.10 If product is purchased for agencies of the U.S.
Government (see Section 12).
5.2 The following options are available and, when required,
shall be speciﬁed at the time of placing the order:
5.2.1 Tensile test for product
1
⁄
2
in. [12 mm] and over (see
9.2.1).
5.2.2 Certiﬁcation (refer to Speciﬁcations B249/B249M or
B250/B250M).
5.2.3 Test Report (refer to Speciﬁcations B249/B249M or
B250/B250M).
6. Materials and Manufacture
6.1 Materials:
6.1.1 The material of manufacture shall be a form (cast bar,
cake, slab, et cetera) of Copper Alloy UNS No. C36000 or
C36010 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.
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.
6.2 Manufacture:
6.2.1 The product shall be manufactured by such hot
working, cold working, and annealing processes as to produce
a uniform wrought structure in the ﬁnished product.
6.2.2 The product shall be hot or cold worked to the ﬁnished
size, and subsequently annealed when required, to meet the
temper properties speciﬁed.
7. Chemical Composition
7.1 The product shall conform to the chemical composition
requirements in Table 1 for the Copper Alloys UNS No.
C36000 or C36010 speciﬁed in the ordering information.
7.2 These 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 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 %. When
all elements in Table 1 are determined, the sum of the results
shall be 99.5 % min.
8. Temper
8.1 The standard tempers for products described in this
speciﬁcation are given in Tables 2-5.
8.1.1 O60 (soft anneal).
8.1.2 H02 (half hard).
8.1.3 H04 (hard).
8.2 Rod and bar shall be furnished in the H02 (half hard)
temper, unless otherwise speciﬁed in the ordering information
(see 5.1.3).
9. Mechanical Property Requirements
9.1 Tensile Strength Requirements:
9.1.1 Product furnished under this speciﬁcation shall con-
form to the tensile requirements prescribed in Tables 2 and 3,
when tested in accordance with Test Methods E8/E8M.
9.1.1.1 Acceptance or rejection based upon mechanical
properties shall depend only on tensile strength.
9.2 Rockwell Hardness:
9.2.1 The approximate Rockwell hardness values given in
Tables Table 4 and Table 5 are for general information and
assistance in testing and shall not be used as a basis for product
rejection.
9.3 Mechanical property requirements for shapes shall be to
agreement between the manufacturer and the purchaser and the
agreement shall be part of that contract or purchase order.
10. Dimensions, Mass, and Permissible Variations
10.1 The dimensions and tolerances for rod, bar, and shapes
described by this speciﬁcation shall be as speciﬁed in Speciﬁ-
cation 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, Rectangular and Square—Tables 8 and 10.
10.1.2 Shapes—Dimensional tolerances shall be subject to
agreement between the manufacturer and the purchaser and the
agreement shall be part of the contract or purchase order.
TABLE 1 Chemical Requirements
Copper Alloy UNS No. C36000 and C36010
Element Composition, %
Copper Alloy UNS No.
C36000 C36010
Copper 60.0 to 63.0 60.0 to 63.0
Lead 2.5 to 3.0 3.1 to 3.7
Iron, max 0.35 0.35
Zinc Remainder Remainder
B16/B16M − 24
2

TABLE 2 Tensile Requirements, Inch-Pound

NOTE 1—See Table 3 for SI values.

Temper Designation

Standard Name

Diameter or Distance Between

Parallel Surfaces, in.

Tensile Strength,

min, ksi

Yield Strength

at 0.5 %

Extension

under Load,

min, ksi

Elongation,

min, %

Rod and Wire

O60 soft

anneal

1 and under 48 20 15

over 1 to 2, incl. 44 18 20

over 2 40 15 25

H02 half-hard under

⁄

57 25 7

⁄

to 1, incl. 55

25 10

over 1 to 2, incl. 50 20 15

over 2 to 4, incl., and 45 15 20

over 4 40 15 20

H04 hard

⁄

incl. 80 45

over

⁄

incl. 70 35 4

over

⁄

incl. 65 30 6

Bar

Standard Name Thickness, in. Width, in.

O60 soft anneal 1 and under 6 and under 44 18 20

over 1 6 and under 40 15 25

H02 half-hard

⁄

and under 1 and under 50 25 10

⁄

and under over 1 to 6, incl. 45 17 15

over

⁄

to 2, incl. 2 and under 45 17 15

over

⁄

to 2, incl. over 2 to 6, incl. 40 15 20

over 2 over 2 to 4, incl. 40 15 20

In any case, a minimum gage length of 1 in. shall be used.

For product furnished in coils the elongation shall be 4 % min.

If product is speciﬁed for thread rolling applications, the minimum tensile strength shall be 52 ksi.

TABLE 3 Tensile Requirements, SI

NOTE 1—See Table 2 for inch-pound values.

Temper Designation

Standard Name

Diameter or Distance Between

Parallel Surfaces, mm

Tensile Strength,

min, MPa

Yield Strength

at 0.5 %

Extension

under Load,

min, MPa

Elongation,

min, %

Rod and Wire

O60 soft

anneal

25 and under 330 140 15

over 25 to 50, incl. 305 125 20

over 50 275 105 25

H02 half-hard under 12 395 170 7

12 to 25, incl. 380

170 10

over 25 to 50, incl. 345 140 15

over 50 to 100, incl., and 310 105 20

over 100 275 105 20

H04 hard 1.6 to 4, incl. 550 310

over 4 to 12, incl. 480 240 4

over 12 to 18, incl. 450 205 6

Bar

Standard Name Thickness, mm Width, mm

O60 soft anneal 25 and under 150 and under 305 125 20

over 25 150 and under 275 105 25

H02 half-hard 12 and under 25 and under 345 170 10

12 and under over 25 to 150, incl. 310 115 15

over 12 to 50, incl. 50 and under 310 115 15

over 12 to 50, incl. over 50 to 150, incl. 275 105 20

over 50 over 50 to 100, incl. 275 105 20

In any case, a minimum gage length of 25 mm shall be used. SI elongation values are based on a gage length of 5.65 times the square root of the area for dimensions

greater than 2.5 mm.

For product furnished in coils the elongation shall be 4 % min.

If product is speciﬁed for thread rolling applications, the minimum tensile strength shall be 350 MPa.

B16/B16M − 24

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标签： #螺钉机 #易切削 #黄铜条材

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ASTM B16-B 16M-2024 Standard Specification for Free-Cutting Brass Rod,Bar and Shapes for Use in Screw Machines 制螺钉机用易切削黄铜条材、棒材和型材

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ASTM B16-B 16M-24 制螺钉机用易切削黄铜条材、棒材和型材

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