1. Scope

1.1 This specification covers general requirements common to wrought precious metal electrical contact alloy products in the form of sheet, strip, wire, and rod. Unless otherwise specified in the purchase order or in an individual specification, these general requirements shall apply to wrought electrical contact materials where indicated in the applicable product specifications issued by ASTM.

1.2 In case of conflict, the requirements on the purchase order, the individual specification, and this general specification shall prevail in the sequence named.

1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.

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.

1.5 It is the responsibility of the user to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet for this product/material as provided by the manufacturer.

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

B63 Test Method for Resistivity of Metallically Conducting Resistance and Contact Materials

B772 Guide for Specifying the Chemical Compositions for Electrical Contact Materials (Arcing and Nonarcing)

E3 Guide for Preparation of Metallographic Specimens

E8 Test Methods for Tension Testing of Metallic Materials

E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition

E112 Test Methods for Determining Average Grain Size

E384 Test Method for Knoop and Vickers Hardness of Materials

Keywords

contacts; electrical contact materials; wrought precious metal ; Coin-silver alloy; Electrical conductors--silver-copper (euctectic) alloy; Electrical conductors--silver-tungsten alloy; Electrical contact materials--specifications; Electrical insulating materials--specifications; General delivery requirements; Gold alloy--electrical contact materials; Metal electrical conductors; Noble metals; Palladium alloy electrical contact materials--specifications; Precious metals (wrought); Silver-copper eutectic electrical contact alloy; Silver (electrical/electronic applications)--specifications; Silver-tungsten electrical contact alloy

ICS Code

ICS Number Code 77.120.99 (Other non-ferrous metals and their alloys)

DOI: 10.1520/B0476-90R95E01

ASTM International is a member of CrossRef.