ASTM B298

Abstract

This specification covers silver-coated, soft or annealed, round copper wire, intended for use in electrical equipment. The silver-coated wires are classified according to the total weight of the coated wires, namely; Class A, B, C, D, and E. Tensile strength test, resistivity test, weight of coating, and dimensional measurements shall be performed to conform to the requirements specified.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

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

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

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

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

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

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

1.2 Silver-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)
Diameter, in.	cmils	in.²	Elongation in 10 in., min, %	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
B4 Specification Tough-Pitch Lake Copper-Refinery Shapes B5 Specification for High Conductivity Tough-Pitch Copper Refinery Shapes B193 Test Method for Resistivity of Electrical Conductor Materials B258 Specification for Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials Keywords copper wire silver-coated; silver-coated annealed copper wire; silver-coated copper electrical equipment wire; silver-coated soft copper wire; ICS Code DOI: 10.1520/B0298-12 ASTM International is a member of CrossRef. ASTM B298 (Electrical Standards and Magnetic Conductor Standards) Citing ASTM Standards [Back to Top]

ASTM B298 - 12

ASTM B298 - 12 Standard Specification for Silver-Coated Soft or Annealed Copper Wire

ASTM B298 (Electrical Standards and Magnetic Conductor Standards)