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ASTM B 298 : 2012

ASTM B 298 : 2012

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

Standard Specification for Silver-Coated Soft or Annealed Copper Wire

Available format(s)

Hardcopy , PDF

Superseded date

01-11-2024

Superseded by

ASTM B 298 : 2012 : R2017

Language(s)

English

Published date

15-11-2012

Publisher

American Society for Testing and Materials

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Hardcopy - English
PDF - English
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CONTAINED IN VOL. 02.03, 2017 Describes silver-coated, soft or annealed, round copper wire, intended for use in electrical equipment.

Committee
B 01
DocumentType
Standard
Pages
8
ProductNote
Reconfirmed 2012
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This specification covers silver-coated, soft or annealed, round copper wire, intended for use in electrical equipment, as follows:

1.1.1Class A—Wire whose silver coating is at least 1.25 % of the total weight of the coated wire.

1.1.2Class B—Wire whose silver coating is at least 2.50 % of the total weight of the coated wire.

1.1.3Class C—Wire whose silver coating is at least 4.00 % of the total weight of the coated wire.

1.1.4Class D—Wire whose silver coating is at least 6.10 % of the total weight of the coated wire.

1.1.5Class E—Wire whose silver coating is at least 10.00 % of the total weight of the coated wire.

1.2Silver-coated wire having different minimum percentages of silver by weight may be obtained by mutual agreement between the manufacturer and the purchaser. For information purposes the thickness of coating in microinches provided by the percentages listed above is shown in Table 1 (Explanatory Note 1).

TABLE 1 Tensile Requirements

Diameter,
in.

Area at 20°C

Elongation
in 10 in.,
min, %

Thickness of Coating, μin. (For Information Only)

cmils

in.2

Class A, 1.25
% Silver

Class B, 2.50
% Silver

Class C, 4.00
% Silver

Class D, 6.10
% Silver

Class E, 10.00
% Silver

0.1285

16 510

0.01297

30

340

680

 1 090

1 659

2 720

0.1144

13 090

0.01028

30

303

605

970

1 477

2 422

0.1019

10 380

0.008155

25

270

539

864

1 316

2 157

0.0907

8 230

0.00646

25

240

480

768

1 171

1 941

0.0808

6 530

0.00513

25

214

428

684

1 043

1 710

0.0720

5 180

0.00407

25

190

381

610

930 

1 524

0.0641

4 110

0.00323

25

170

339

542

828 

1 357

0.0571

3 260

0.00256

25

151

302

483

737 

1 209

0.0508

2 580

0.00203

25

134

269

430

656 

1 075

0.0453

2 050

0.00161

25

120

240

383

585 

959 

0.0403

1 620

0.00128

25

107

213

341

520 

853 

0.0359

1 290

0.00101

25

95

190

304

464 

760 

0.0320

1 020

0.000804

25

85

169

270

413 

677 

0.0285

 812

0.000638

25

75

151

241

368 

603 

0.0253

 640

0.000503

25

67

134

214

327 

536 

0.0226

 511

0.000401

25

60

120

191

292 

478 

0.0201

 404

0.00317

20

53

106

170

260 

425 

0.0179

 320

0.000252

20

47

95

151

231 

379 

0.0159

 253

0.000199

20

42

84

135

205 

337 

0.0142

 202

0.000158

20

...

75

120

183 

301 

0.0126

 159

0.000125

20

...

67

107

163 

267 

0.0113

 128

0.000100

20

...

60

96

146 

239 

0.0100

 100

0.0000785

20

...

53

85

129 

212 

0.0089

 79.2

0.0000622

15

...

47

75

115 

188 

0.0080

 64.0

0.0000503

15

...

42

68

103 

169 

0.0071

 50.4

0.0000396

15

...

...

60

92 

150 

0.0063

 39.7

0.0000312

15

...

...

53

81 

133 

0.0056

 31.4

0.0000246

15

...

...

47

72 

119 

0.0050

 25.0

0.0000196

15

...

...

42

65 

106 

0.0045

 20.2

0.0000159

15

...

...

...

58 

95 

0.0040

 16.0

0.0000126

15

...

...

...

52 

85 

0.0035

 12.2

0.00000962

15

...

...

...

45 

74 

0.0031

 9.61

0.00000755

15

...

...

...

40 

66 

0.0028

 7.84

0.00000616

10

...

...

...

...

59 

0.0025

 6.25

0.00000491

10

...

...

...

...

53 

0.0022
0.0020

 4.84
 4.00

0.00000380
0.00000314

10
10

...
...

...
...

... 
...

... 
...

47 
42 


1.3The 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.

1.3.1Exceptions—The SI values for density, resistivity, and volume are to be regarded as standard.

1.4The following precautionary caveat pertains only to the test method section 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements see 8.4.1.2 and Explanatory Note 2.

ASTM B 49 : 2017 : REDLINE Standard Specification for Copper Rod for Electrical Purposes
ASTM E 50 : 2017 : REDLINE Standard Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
ASTM B 193 : 2016 : REDLINE Standard Test Method for Resistivity of Electrical Conductor Materials

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