ASTM B684-97(2012)
Standard Specification for Platinum-Iridium Electrical Contact Materials
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1. Scope
1.1 This specification covers an 85 % platinum—15 % iridium alloy, and a 90 % platinum—10 % iridium alloy, in the form of rod, wire, strip, and sheet material for electrical contacts.
| Element | 85 Pt/15 Ir | 90 Pt/10 Ir |
|
| Weight % | Weight % |
| Pt | balance | balance |
| Ir | 14.50-15.50 | 9.50-10.50 |
| Total Impurities | 0.2 max. | 0.2 max. |
| Total Platinum Group (Pd, Rh, Os, Ru), Au | 0.1 max. | 0.1 max. |
| Total Other Impurities (including the | 0.1 max. | 0.1 max. |
| Pb, Sb, Bi, Sn, As, Cd, Zn | 0.01 max each | 0.01 max each |
| Fe | 0.015 max each | 0.015 max each |
| Other elements | 0.02 max each | 0.02 max each |
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 original specification, B684 - 81, covered the 85 % platinum 15 % iridium alloy. The 1997 revision of this specification added the 90 % platinum 10 % iridium alloy.
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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
B277 Test Method for Hardness of Electrical Contact Materials
B476 Specification for General Requirements for Wrought Precious Metal Electrical Contact Materials
E8 Test Methods for Tension Testing of Metallic Materials
E384 Test Method for Knoop and Vickers Hardness of Materials
ICS Code
ICS Number Code 77.120.99 (Other non-ferrous metals and their alloys)
UNSPSC Code
UNSPSC Code 31133702(Electrical contact powdered metal and metal alloy)
Referencing This Standard
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DOI: 10.1520/B0684-97R12
Citation Format
ASTM B684-97(2012), Standard Specification for Platinum-Iridium Electrical Contact Materials, ASTM International, West Conshohocken, PA, 2012, www.astm.org
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