ASTM B563 - 01 (2022)

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Designation: B563 −01 (Reapproved 2022)
Standard Speciﬁcation for
Palladium-Silver-Copper Electrical Contact Alloy
1
This standard is issued under the ﬁxed designation B563; 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 an alloy containing palladium,
silver, copper, platinum, and nickel in the form of wire, rod,
and strip for electrical contacts.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
and are not considered standard.
1.3 The following precautionary statement pertains to the
test method portion only, Section 7, of 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 become familiar with all hazards including
those identiﬁed in the appropriate Safety Data Sheet (SDS) for
this product/material as provided by the manufacturer, to
establish appropriate safety, health, and environmental
practices, and determine the applicability of regulatory limi-
tations 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
B476 Speciﬁcation for General Requirements for Wrought
Precious Metal Electrical Contact Materials
E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
E384 Test Method for Microindentation Hardness of Mate-
rials
3. Materials and Manufacture
3.1 Raw materials shall be of such quality and purity that
the ﬁnished product will have the properties and characteristics
prescribed in this speciﬁcation.
3.2 The material shall be ﬁnished by such operations (cold
working, heat treating, annealing, turning, grinding, pickling)
and are required to produce the prescribed properties.
4. Chemical Composition
4.1 Material produced under this speciﬁcation shall meet the
requirements of chemical composition shown in Table 1.
5. Mechanical Properties
5.1 The contract or order may specify ultimate tensile
strength, elongation, microhardness (Knoop or Vickers), hard-
ness (Rockwell or Rockwell Superﬁcial), or a combination of
these mechanical properties as temper criterion. If the contract
or order does not specify a temper criterion, then the criterion
for temper designation will be ultimate tensile strength and
elongation.
5.2 The material shall conform to the mechanical properties
shown in Table 2,Table 3,orTable 4.
6. General Requirements
6.1 Speciﬁcation B476 shall apply to all materials produced
to this speciﬁcation.
7. Test Methods
7.1 Test methods are in accordance with Speciﬁcation B476.
7.2 All tension tests are in accordance with Test Methods
E8/E8M and tensile specimens are full cross-section size when
practical. Elongation measurements should be based ona2in.
(50 mm) gauge length.
7.3 Hardness is in accordance with Test Method E384. Test
material 0.005 in. (0.13 mm) in thickness (diameter) and larger
using a 100 g indenter load. Test material less than 0.005 in. in
thickness (diameter) using a 50 g indenter load. Make a
minimum of ﬁve hardness indentations on each specimen.
Make all indentations so that the long axis of the Knoop
indenter is parallel to the rolling or drawing direction of the
material.
1
This speciﬁcation is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.05 on Precious Metals and Electrical Contact Materials.
Current edition approved April 1, 2022. Published April 2022. Originally
approved in 1972. Last previous edition approved in 2017 as B563 – 01 (2017).
DOI: 10.1520/B0563-01R22.
2
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.
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

7.4 Perform chemical analysis by spectrochemical or wet

analysis methods.

7.5 Conduct all tests at room temperature (65 to 85 °F (18 to

29 °C)).

8. Inspection and Testing

8.1 Material furnished under this speciﬁcation shall be

inspected and tested by the manufacturer as follows:

8.1.1 Visual inspection at 10× magniﬁcation,

8.1.2 Tension or hardness tests, or both, for temper

veriﬁcation,

8.1.3 Dimensional inspection, and

8.1.4 Chemical analysis when indicated by the purchase

order.

9. Keywords

9.1 contacts; electrical contacts; low contact resistance; low

energy contact; non arcing contact; palladium alloy; palladium-

silver-copper

APPENDIX

(Nonmandatory Information)

X1. REFERENCE PROPERTIES FOR PALLADIUM ELECTRICAL CONTACT MATERIAL

X1.1 Table X1.1 contains a list of typical property values

which are useful for engineering calculations in electrical

contact design and application.

TABLE 1 Chemical Requirements

Element Composition,

weight %

Palladium 43.0–45.0

Silver 37.0–39.0

Copper 15.5–16.5

Platinum 0.8–1.2

Nickel 0.8–1.2

Total noble metal impurities 0.2 max

Total base metal impurities 0.2 max

TABLE 2 Mechanical Requirements for Wire 0.003 to 0.020 in.

(0.13 to 0.51 mm) Diameter

Property Units

Temper Age

Hardened

Solution

Annealed

Stress

Relieved

Tensile strength ksi

MPa

100–120

689–827

135–165

930–1137

160–210

1034–1344

Elongation percent 20 min 8 min 1–10

Hardness, Knoop HK

100 B

170–250 260–330 320–380

Hardness, Vickers HV

100 B

170–240 240–330 290–370

See 7.1.

See 7.3.

TABLE 3 Mechanical Requirements for Wire Over 0.020 to 0.060

in. (0.51 to 1.52 mm) Diameter

Property Units

Temper

Solution

Annealed

Age

Hardened

Tensile strength ksi

MPa

100–120

689–827

160–210

1000–1310

Elongation percent 15 min 1–10

Hardness, Knoop HK

100 B

170–250 340–400

Hardness, Vickers HV

100 B

170–240 310–390

See 7.1.

See 7.3.

TABLE 4 Mechanical Requirements for Strip 0.003 to 0.015 in.

(0.076 to 0.38 mm) Thick

Property Units

Temper Age

Hardened

Solution

Annealed

Stress

Relieved

Tensile strength ksi

MPa

100–120

689–827

140–170

965–1171

150–195

1034–1344

Elongation percent 15 min 8 min 1–13

Hardness, Knoop HK

100 B

170–250 260–330 320–380

Hardness, Vickers HV

100 B

170–240 250–320 290–370

See 7.1.

See 7.3.

B563 − 01 (2022)

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned

in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk

of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and

if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards

and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the

responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should

make your views known to the ASTM Committee on Standards, at the address shown below.

This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above

address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website

(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222

Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http://www.copyright.com/

TABLE X1.1 Physical Properties

Solution Annealed

Stress Relieved

Age Hardened

Resistivity:

Ω·cmil/ft 185 180 155

µΩ·cm 30.7 29.9 25.8

Density, g/cm

10.8 10.8 10.8

Solidus temperature, °C 1032 1032 1032

Linear coefficient of thermal expansion, °C (23 to 100 °C) 13.5 × 10

−6

13.5 × 10

−6

13.5 × 10

−6

Thermal emf versus platinum (0–100 °C), µ V/°C −18 ... −23

Softening voltage, mV ... ... 200

Melting voltage, mV ... ... 390

Fatigue strength (rotating-bending) at 10° stress reversals:

ksi

MPa

Modulus of elasticity in tension:

310

ksi

MPa

16×10

110×10

16×10

110×10

16×10

110×10

Material in the solution-annealed and stress-relieved tempers may be age hardened by subjecting it to an elevated temperature for a speciﬁed period of time.

Temperatures ranging from 800 to 1000 °F (430 to 540 °C) at times from 10 to 45 min (the lower temperatures require the longer times) are ordinarily useful. When age

hardening is to be done by other than the material manufacturer, the manufacturer should be consulted for the time-temperature treatment most suitable for the purchaser’s

application.

B563 − 01 (2022)

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摘要：

ASTM B563 - 01 (2022) 是美国材料与试验协会发布的一项标准规范，主要适用于特定成分的钯银合金（如60%钯与40%银）制成的板材、带材和线材，广泛应用于电气触点、继电器及精密电子元件。该标准于2001年首次发布，2022年完成最新复审确认，旨在明确材料的化学成分范围、机械性能要求（如抗拉强度、硬度）以及导电率测试方法，确保产品在高温、高腐蚀或频繁通断环境下的可靠性与耐久性。符合ASTM B563-01(2022)的钯银合金因其优良的抗氧化性、稳定的接触电阻和适中的成本，被通信设

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