ASTM B197/B197M-99
(Specification)Standard Specification for Copper-Beryllium Alloy Wire
Standard Specification for Copper-Beryllium Alloy Wire
SCOPE
1.1 This specification establishes the requirements for copper-beryllium alloy wire in coils, spools, or other than straight lengths, of any uniform cross section. Copper Alloy UNS Nos. C17200 and C17300 are included.
1.2 Unless otherwise required, Copper Alloy UNS No. C17200 shall be the alloy furnished whenever Specification B 197/B 197M is specified without any alloy designation.
1.3 The values stated in either inch-pounds or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: B 197/B 197M – 99
Standard Specification for
Copper-Beryllium Alloy Wire
This standard is issued under the fixed designation B 197/B 197M; 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 * E 112 Test Methods for Determining Average Grain Size
E 527 Practice for Numbering Metals and Alloys (UNS)
1.1 This specification establishes the requirements for
copper-beryllium alloy wire in coils, spools, or other than
3. General Requirements
straight lengths, of any uniform cross section. Copper Alloy
2 3.1 The following sections of Specification B 250 constitute
UNS Nos. C17200 and C17300 are included.
a part of this specification:
1.2 Unless otherwise required, Copper Alloy UNS No.
3.1.1 Terminology,
C17200 shall be the alloy furnished whenever Specification B
3.1.2 Material and Manufacturer,
197 is specified without any alloy designation.
3.1.3 Chemical Composition,
1.3 The values stated in either inch-pounds or SI units are to
3.1.4 Dimensions and Permissible Variations,
be regarded separately as the standard. Within the text, the SI
3.1.5 Workmanship, Finish, and Appearance,
units are shown in brackets. The values stated in each system
3.1.6 Sampling,
are not exact equivalents; therefore, each system shall be used
3.1.7 Number of Tests and Retests,
independently of the other. Combining values from the two
3.1.8 Specimen Preparation,
systems may result in nonconformance with the specification.
3.1.9 Test Methods,
1.4 This standard does not purport to address all of the
3.1.10 Significance of Numerical Limits,
safety concerns, if any, associated with its use. It is the
3.1.11 Inspection,
responsibility of the user of this standard to establish appro-
3.1.12 Rejection and Rehearing,
priate safety and health practices and determine the applica-
3.1.13 Certification,
bility of regulatory limitations prior to use.
3.1.14 Mill Test Report, and
2. Referenced Documents 3.1.15 Packaging and Package Marking.
3.2 In addition, when a section with a title identical to that
2.1 The following documents in the current issue of the
referenced in 3.1 above, appears in this specification, it
Book of Standards form a part of this specification to the extent
contains additional requirements which supplement those ap-
referenced herein:
pearing in Specification B 250.
2.2 ASTM Standards:
B 194 Specification for Copper-Beryllium Alloy Plate,
4. Terminology
Sheet, Strip, and Rolled Bar
4.1 For terms related to copper and copper alloys, refer to
B 250 Specification for General Requirements for Wrought
3 Terminology B 846.
Copper-Alloy Wire
4.2 Definition of Term Specific to This Standard:
B 601 Practice for Temper Designations for Copper and
3 4.2.1 grain count—the number of grains per stock thick-
Copper Alloys—Wrought and Cast
ness.
B 846 Standard Terminology for Copper and Copper Al-
loys
5. Ordering Information
E 8 Test Methods for Tension Testing of Metallic Materials
5.1 Orders for products should include the following infor-
mation:
This specification is under the jurisdiction of ASTM Committee B05 on Copper
5.1.1 ASTM specification designation and year of issue,
and Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod,
5.1.2 Copper (Alloy) UNS No. designation,
Bar, Wire, Shapes, and Forgings.
5.1.3 Temper (Section 7),
Current edition approved April 10, 1999. Published July 1999. Originally
published as B 197 – 45 T. Last previous edition B 197/B 197M – 98. 5.1.4 Dimensions, diameter, or distance between parallel
The UNS system for copper and copper alloys (see Practice E 527) is a simple
surfaces, and length if applicable,
expansion of the former standard designation system accomplished by the addition
of a prefix “C” and a suffix “00.” The suffix can be used to accommodate
composition variations of the base alloy.
Annual Book of ASTM Standards, Vol 02.01.
4 5
Annual Book of ASTM Standards, Vol 03.01. Annual Book of ASTM Standards, Vol 01.01.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
B 197/B 197M
TABLE 2 Tensile Strength Requirements for Round, Hexagonal,
5.1.5 Form of material: cross section such as round, hex-
Octagonal, and Square Wire After Precipitation Heat Treatment
agonal, octagonal, oval, trapezoidal, and so forth,
(See 11.2)
5.1.6 How furnished: coils spools, reels, or bucks, and
A
Temper Designation Tensile Strength,
specific lengths with or without ends or stock lengths with or
B
Standard Former ksi MPa
without ends if applicable, and
C
5.1.7 When material is ordered for agencies of the U.S. TF00 Precipitation 160–200 [1105–1380]
hardened (AT)
Government (see Section 15).
C
TH01 ⁄4 hard and 175–210 [1205–1450]
5.2 The following options are available and should be
precipitation heat
treated ( ⁄4HT)
specified in the contract or purchase order when required:
TH02 ⁄2 hard and 185–215 [1275–1480]
5.2.1 Type of edge: square corners, round edge, full-
precipitation heat
rounded edge (see the Edge contours section in the Dimensions
treated ( ⁄2HT)
TH03 ⁄4 hard and 190–230 [1310–1585]
and Permissible Variations Section of Specification B 250),
precipitation heat
5.2.2 Grain size (Section 9.1),
D
treated ( ⁄4HT)
5.2.3 Grain count (Section 9.2),
TH04 Hard and 195–230 [1345–1585]
precipitation heat
5.2.4 Mechanical properties (tensile strength and hardness)
treated (HT)
(Section 10),
A
These values apply to mill products (see 11.2). See 11.3 for exceptions in mill
5.2.5 Bend test (after precipitation heat treatment) (11.1),
products.
B
5.2.6 Heat identification or traceability details,
ksi = 1000 psi.
C
Corrected editorially.
5.2.7 Special packaging requirements,
D
TH03 ( ⁄4HT) condition is generally available up to 0.080 in. [2.0 mm],
5.2.8 Certification, and
inclusive, in diameter or distance between parallel surfaces.
5.2.9 Mill test report.
NOTE 1—Special or nonstandard tempers are subject to negotiation
6. Chemical Composition
between the supplier and the purchaser.
6.1 The material shall conform to the chemical composition
8. Precipitation Heat Treatment
requirements prescribed in Table 1 for copper alloy UNS No.
designation specified in the ordering information.
8.1 The precipitation heat treatment is normally performed
6.2 These composition limits do not preclude the presence
by the purchaser after forming. The heat treatment specified
of other elements. Limits for unnamed elements may be
herein is applicable to mill products. Other treatment times and
established and analysis required by agreement between the
temperatures may be preferable for end products made from
manufacturer or supplier and purchaser.
this material.
6.3 Copper is customarily given as remainder, but may be
8.2 Conformance to the TF00 (AT) through TH04 (HT)
taken as the difference between the sum of all elements
specification limits shown in Tables 2 and 3 for products
analyzed and 100 %.
supplied in the TB00 (A) through TD04 (H) tempers, shall be
6.4 When all the elements in Table 1 are determined, the
determined by testing test specimens heat-treated at a uniform
sum of results shall be 99.5 % min.
temperature of 600 to 625°F [316 to 329°C] for the times
shown in Table 5.
7. Temper
8.3 Special combinations of properties such as increased
7.1 The standard tempers available under this specification
ductility, electrical conductivity, dimensional accuracy, endur-
and as specified in Practice B 601 are TB00 (solution heat
ance life, and resistance to elastic drift and hysteresis in springs
treated), or with varying degrees of cold work TD00 to TD04
may be obtained by special precipitation-hardening heat treat-
to be precipitation heat treated by the user. Also available are
ments. The mechanical requirements of Tables 2 and 3 do not
products already precipitation heat-treated by the manufac-
apply to such special heat treatments.
turer, tempers TF00 (AT), TH00 to TH04. These products meet
9. Physical Property Requirements
property requirements in Tables 2 and 3 and generally do not
require further heat treatment by the user. 9.1 Grain Size—The average grain size of each of two
7.2 The pretempered product TL08 shown in Table 4 is
samples of rectangular other than square wire, in thicknesses
prepared by the manufacturer for special applications. over 0.010 in. [0.25 mm] taken after precipitation heat treat-
ment (see 8.2), shall not exceed the limits specified in Table 6
TABLE 1 Chemical Requirements
when determined in accordance with Test Methods E 112 and
Composition, % taken on a plane perpendicular to the direction of rolling or
Element
drawing.
Copper Alloy UNS Copper Alloy UNS
No. C17200 No. C17300
9.2 Grain Count:
Beryllium 1.80–2.00 1.80–2.00 9.2.1 The grain count of each of two samples of rectangular
Additive elements:
other than square wire, in thicknesses over 0.004 to 0.010 in.
Nickel + cobalt, min 0.20 0.20
[0.10 to 0.25 mm] inclusive, taken after precipitation heat
Nickel + cobalt + iron, max 0.6 0.6
Lead . . . 0.20–0.60 treatment (see 8.2), shall not be less than the limits specified in
Aluminum, max 0.20 0.20
Table 7 when tested in accordance with 9.2.2.
Silicon, max 0.20 0.20
9.2.2 Grain count is the number of grains per stock thick-
Copper remainder remainder
ness, averaged for five locations one stock thickness apart.
B 197/B 197M
A
TABLE 3 Mechanical Property Requirements for Rectangular Other Than Square Wire After Precipitation Heat Treatment (See 11.2)
NOTE—Rockwell hardness values apply only to direct determinations, not converted values.
A B
Temper
...
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