![]() ![]() I have not found much documentation about hardening fine silver. This information seems to be close to the information in the first section of my post. This somewhat closely matches the information provided on the Rio Grande website. They were able to provide a chart they refer to showing the work hardening of fine silver. I also had the same experience with Stuller”Stuller”. “Comparing Silver Hardnesses.” Rio Grande, Comparing Silver Hardnesses, March 1, 2021. They were not able to definitively quote a sourceRio Grande. The first bit of published information came from a page on Rio Grande, but when I contacted them, they said the information was old and they would look into finding the documentation behind it. Metals Handbook 10th edition, Volume 2, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials.Copyright © 1990 by ASM International. page 1156-1157 ℃Īs a result of the high and fairly uniform reflectance in the visible range, silver is considered white, but if human eyes were sensitive to a slightly shorter wavelength region, silver would appear to have color. 900 silver, or 90% silver and 10% copper.)Įlongation in 50mm or 2 in., % Cold workedĪdditional information from 6-1157 It is now fairly rare and the name causes quite a bit of confusion. Alloyĩ0ag-10cu (Coin Silver Coin silver was once a more common alloy in the United States. ![]() there are 16 rows dealing with special alloys but I will only post those with a silver-copper alloy. The following information is from table 4 “ Properties of silver metals used for electrical contacts“on page 844. The low hardness and low mechanical strength of fine silver result in high rates of mechanical wear. Fine silver contacts tend to weld easily, and usually have high erosion loss. The low boiling and melting points of silver are disadvantages. It has a high current capacity, which limits heat generation, and a high thermal capacity, which allows contacts to readily dissipate the heat generated by arcing. The parts I thought were important to jewelers were on the following pages.įine silver (99.9 ag) has the highest electrical and thermal conductivities of all metals. This information concerns the use of silver in electrical applications. The book I gathered this from is the Metals Handbook 10th edition, Volume 2, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials. ![]() Let me start by sharing the information I have found about fine silver as a metal and its properties.ĪSM International (American Society for Metals) ASM International is the preeminent association for engaging and connecting materials professionals and their organizations to the resources necessary to solve problems, improve outcomes, and advance society. Founded in 1995., and several hours of searching on the interwebs, I think I have collected enough information to share. The world’s largest technical resource website for jewelers and related fields. With a few emails, a post on Ganoksin the professional Jewelry Making Forum Ganoksin – Jewelry Making Forum and Information Resource. So with several weeks of research, I have found that the truth is somewhere in the middle. Being the type of personality that I am, I decided to get to the truth. my opinion was summarily dismissed and the conversation went on with people, mostly hobbyists, either supporting or arguing against my claim. Being a professional jeweler, I answered with the comment that fine silver does not need annealing as it has no copper or other alloying metals in it and as such, can not work harden. ![]() A few weeks ago on Facebook I saw a post about the correct way to anneal fine silver. ![]()
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