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Silver Plating and Silver Alloy Standards

Updated on January 9, 2018
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Tamara Wilhite is a technical writer, industrial engineer, mother of 2, and a published sci-fi and horror author.

Introduction

Whether silver plating wire for circuits or silver plating items for decoration, there are industry standards on everything from how to apply silver plate to testing the material's performance. What are the main silver plating industry standards?

While gold plating attracts one's attention, silver plating is more commonly used because of silver's relatively low cost and excellent conductivity.
While gold plating attracts one's attention, silver plating is more commonly used because of silver's relatively low cost and excellent conductivity. | Source

ASTM Standards for Silver Plating

ASTM B501 is the ASTM standard for silver coated copper clad steel wire. ASTM B501 has been adopted by the DoD.

ASTM B971 is the standard for silver coated flat copper wire used in electronics. ASTM B298 is the standard for silver coated copper wire.

ASTM B961 gives the specifications for silver coated copper used in electronics destined for aerospace applications.

ASTM Standards for Silver Alloys and Silver Plating

ASTM B617 is the specification for silver alloy used for electrical contacts. ASTM B631 gives the material specifications for silver-tungsten alloys used in electrical contacts.

ASTM B628 is the material specification for silver-copper alloy used in electrical contacts. This standard has been adopted by the U.S. Department of Defense. ASTM B563 is the specification for silver-palladium-copper alloys used in electrical contacts. ASTM B731 is the standard for 60% palladium and 40% silver alloy used for electrical contacts.

ASTM B700 is the material specification for electro-deposited silver coatings.

ASTM B662 is the material specification for silver-molybdenum alloy used for electrical contacts. ASTM B663 gives the specifications for silver-tungsten carbide used for electrical contacts. ASTM B663 has been adopted by the DoD. ASTM 693 gives the material specifications for silver-nickel alloy used for electrical contacts.

Silver plating standards also exist for alloys that contain silver along with other metals. ASTM B780 outlines the specifications for silver-copper-nickel alloy used for electrical contacts that is 75% silver.ASTM C752 is the specification for nuclear grade silver-indium-cadmium alloy.

ISO Standards for Silver Coatings

ISO 4521 is the standard for electro-deposited silver alloy and pure silver coatings. ISO 4521 is the standard for both the material and test methods.

ISO 8442-8 is the standard for silver and silver-plated cutlery that comes into contact with food. ISO 8442-6 applies to silver plated tableware covered by lacquer.

IPC Standards for Silver Plating

IPC is the Association Connecting Electronics Industries’ standards organization.IPC is best known for its standards on inspecting printed wiring boards. IPC 4553 is the standard for silver plating of printed circuit boards using immersion. Version A of this standard was published in 2009.

SAE Standards for Silver in Electronics

SAE ARP573 is the standard for silver brazed joints used in aerospace propulsion systems. First published in 2001, version D came out in 2012.

SAE AMS3681 is the SAE standard for silver filled epoxy resin adhesives. While plastic is generally not electrically conductive, silver filled epoxy can conduct electricity. SAE AMS3681 revision C came out in 2005.

SAE Aerospace Recommended Practice or SAE ARP 6400 gives the recommended practice for handling silver plated conductors and wires.

European Standards for Silver Plating

BSI BS 1561 is the British Standard for silver salts for electroplating. BSI BS EN 2328 is the standard for silver plated shaft nuts with left handed thread made from heat resisting A286 steel.

BSI BS EN 2907 is the standard for silver plated bi-hexagonal self-locking nuts made from A286 steel and silver plated. BSI EN 3236 is the standard for silver plated nickel alloy self-locking inserts.

SAE Standards for Silver Plating

SAE AMS3410 is the SAE standard for silver brazing flux. Revision J came out in 2010.

SAE AMS3441 is the standard for high temperature silver brazing flux. Revision D came out in 2010.

SAE AMS2411 gives the specifications for silver plating to survive high temperatures. Revision G came out in 2008. This standard has been adopted by the DoD.

SAE AMS2412 is the specification for silver copper strike plating. This standard has been adopted by the DoD. The latest version of this standard is revision J, published in 2009.

SAE AMS2410 is the standard for silver nickel strike plating. Revision K was published in 2010.

Military Standards Regarding Silver

MIL-F-24227 is the military standard for silver-brazed, cast bronze flanges and fittings. MIL-PRF-20042 is the specification for silver brazing of bronze pipe flanges. MIL-W-81822 is the specification for silver coated electrical wire covered with PTFE insulation. However, in most cases, items built for the military will need to meet ASTM or ANSI standards rather than military specifications.

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