NDLI: New insights for the specification of copper alloy strip metals for connectors

Content Provider	IEEE Xplore Digital Library
Author	Zarlingo, S.P.
Copyright Year	1996
Description	Author affiliation: VP Adm., Introspective Inc., USA (Zarlingo, S.P.)
Abstract	The American Society for Testing and Materials publishes specifications that prescribe the temper of several metals, including copper alloy strip metals. Most of the strip metals used for connectors are included. Manufacturers of these strip metals are obliged to produce them so that they meet ASTM specifications. The mechanical properties in specifications ordained by the Society are published by the manufacturers in promotional materials. Thus, it's not surprising that the specifications most often found in purchasing documents and on engineering drawings coincide with the values published by this Society and the manufacturers. While the effect of this practice on standardization is some what laudable, it often leads to the wrong specification for connector spring metals. At best, mis-specification is discovered in the prototype stage of development, and "merely" causes delay in getting parts on test and into production. At worst, the metal does provide prototype parts that meet initial performance requirements; it is only later, perhaps even after several production shipments, that manufacturing problems develop. Or worse, field failures are reported. It is only then discovered that the strip metal was inadequately specified. ASTM specifications primarily ensure that a particular temper is being obtained, that the metal has a particular breaking strength. Obviously, connector springs are not designed with the breaking strength in mind. Meeting the typical Society specification does not offer assurance that there is enough strength for the required contact force, that the contact force will endure, that there is enough conductivity, that there is a given spring constant, nor even that the part can be stamped without fracture. These problems will be eliminated (or greatly minimized) by using the new insights in this paper for specification.
Starting Page	471
Ending Page	475
File Size	580422
Page Count	5
File Format	PDF
ISBN	0780332865
ISSN	05695503
DOI	10.1109/ECTC.1996.517430
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-05-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Copper alloys Strips Manufacturing Connectors Springs Prototypes Production Contacts Materials testing Inorganic materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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