ASTM B196M-97

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Designation: B 196M – 97
METRIC
Standard Specification for
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Copper-Beryllium Alloy Rod and Bar [Metric]
This standard is issued under the fixed designation B 196M; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Ordering Information
1.1 This specification covers copper-beryllium alloy rod and 3.1 Orders for material under this specification should
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bar in straight lengths. The following three alloys are covered: include the following information:
3.1.1 Quantity,
Copper Alloy Nominal Beryllium
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UNS No. Content, %
3.1.2 Copper Alloy UNS No. (Section 1),
3.1.3 Form of material (rod or bar and cross section, such as
C17000 1.7
round, hexagonal, etc.),
C17200 1.9
C17300 1.9
3.1.4 Temper (Section 5),
+0.4 lead
3.1.5 Dimensions, the diameter or distance between parallel
1.2 Unless otherwise required, Copper Alloy UNS C17200 surfaces, and length,
shall be the alloy furnished whenever Specification B 196M is
3.1.6 Type of edge, if required (square corners, rounded
specified without any alloy designation.
corners, rounded edge, full rounded edge) (see 8.5),
3.1.7 How furnished (stock or specific lengths, with or
NOTE 1—This specification is the metric companion of Specification
without ends),
B 196.
3.1.8 Tension test or hardness as applicable (See Section 6),
2. Referenced Documents
3.1.9 Specification number and date,
3.1.10 Certification if required (See Specification B 249M,
2.1 The following documents of the issue in effect on date
Section 13),
of material purchase form a part of this specification to the
3.1.11 Mill test report if required (See Specification
extent referenced herein:
B 249M, Section 14), and
2.2 ASTM Standards:
3.1.12 Special tests or exceptions if any.
B 194 Specification for Copper-Beryllium Alloy Plate,
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3.2 When material is purchased for agencies of the U.S.
Sheet, Strip and Rolled Bar
Government, this shall be specified in the contract or purchase
B 249M Specification for General Requirements for
order, and the material shall conform to the Supplementary
Wrought Copper and Copper Alloy Rod, Bar, and Shapes
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Requirements as defined in the current issue of Specification
[Metric]
B 249M.
B 601 Practice for Temper Designations for Copper and
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Copper Alloys—Wrought and Cast
4. Chemical Composition
E 8M Test Methods of Tension Testing of Metallic Materi-
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4.1 The material shall conform to the requirements of Table
als
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1 as to chemical composition.
E 527 Practice for Numbering Metals and Alloys (UNS)
4.2 These specification limits do not preclude the presence
of other elements. Limits may be established by agreement
between manufacturer or supplier and purchaser for these
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This specification is under the jurisdiction of ASTM Committee B-5 on Copper
unnamed elements. Copper is customarily given as remainder,
and Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod,
Bar, Wire, Shapes, and Forging. but may be taken as the difference between the sum of all
Current edition approved Feb. 10, 1997. Published April 1997. Originally
elements analyzed and 100 %. When all the elements in the
published as B 196M – 81. Last previous edition B 196M – 95.
table are analyzed, their sum shall be 99.5 % minimum.
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The UNS system for copper and copper alloys (see Practice E 527) is a simple
expansion of the former standard designation system accomplished by the addition
5. Temper
of a prefix “C” and a suffix “00”. The suffix can be used to accommodate
composition variations of the base alloy.
5.1 The standard temper designations available under this
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Annual Book of ASTM Standards, Vol 02.01.
4 specification and as specified in Practice B 601 are solution
Annual Book of ASTM Standards, Vol 03.01.
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Annual Book of ASTM Standards, Vol 01.01. heat treated TB00 (A) and cold drawn hard TD04 (H), (see
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B 196M
TABLE 1 Chemical Requirements
7.3 End products may be heat treated at other times and
Composition,% temperatures for specific applications. These special combina-
tions of properties such as increased ductility, electrical con-
Element Copper Alloy UNS No.
ductivity, dimensional accuracy, endurance life, and resistance
C17000 C17200 C17300
to elastic drift and hysteresis in springs, may be obtained by
Beryllium 1.60–1.79 1.80–2.00 1.80–2.00
special precipitation-hardening heat treatments. The mechani-
Nickel + cobalt, min 0.20 0.20 0.20
Nickel + cobalt +
...