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Nov 28

1,463 Posts . Do any of you happen know where a location on the web is, or have a chart of the hardness of various alloys such as PB, wheel weights, lino, mono - especially the differences between air cooled vs. water dropped or quenched? I found this from an old metallurgy class. The calculator works well using mixing known alloys, but putting in tin, as an element, yields an incorrect BHN. I'm trying to fill out my collection of general data in regards to reloading; one thing I don't yet have is a chart of the hardness of various alloys of lead. I still remember the first time I loaded hard cast 158gr LSWC's to full power magnum pressure (12.2 grs AA#9) and shot then through my Model 66. 4829 Total Views 1 Views Today. This is useful in reloading. 100 is the upper limit in fps for that alloy. Posted By North Carolina Prepper on June 22, 2016 . Page 30 of Glen Fryxell’s Book (Referenced Below) has an amazing discussion of lead alloy hardness, ingredients (typically Lead, Tin, and Antimony), and their uses. we are left with a huge different in hardness and it is this factor of hardness which dictates the alloys ability to withstand pressure and velocity. Downloadable chart of Lead hardness by use, Orville Deutchman 2019 . Facebook Twitter LinkedIn. While tin may hardness test at a BHN of 30 (or whatever is in the table), when alloyed with lead, the resulting BHN is not linear. He also discusses the concept of OBTURATION is some detail. Using Col. Harrison's table, 1:10, table BHN = 11.5, 1:20, table BHN = 10. Discussion Starter • #1 • May 12, 2010. Posted in Files. Buying a hardness tester is better and way more expensive. As pure lead is taken to be ~ 5 BHN and ‘clip on’ wheel weight ~ 12 BHN (average from table 1.) Pencil hardness test versus Brinell hardness of lead alloys. This is only an approximation, I've had relatively hard wheelweight bullets thoroughly lead a barrel at mid-range velocities, the problem was that they were too small for the bore and there was a lot of gas cutting. Sold in ~5 pound increments. Our Lyman #2 alloy (90% Lead, 5% Tin, 5% Antimony) comes in an ingot that measures approximately 8-3/4" by 1" x 2" and weighs approximately 5 lbs. I suffered with leading mostly in the .357 magnum and .38 spl until the internet came into existence and someone finally explained the use of proper hardness with lead bullets. Especially starting on Pg 32. Hardness is only one variable, you've got alloy composition, type of lube, To make a long story short, once upon a time I've decided to make some kind of a reference table on the most important solder alloys for my very own needs and eventually released it on the Net. Using a Pencil to find out the hardness of a lead alloy. In most lead alloys, heat treating and rapid cooling (quenching) result in a breakdown of the supersaturated solution during storage (aging). (+/-.25) The Brinell Hardness of this Lyman 2 alloy is about ~ 16. Although this breakdown produces coarse structures in certain alloys (lead-tin alloys, for example), it produces fine structures in others (such as lead-antimony alloys). This reference covers solder alloys which feature melting points from about 50°C to about 400°C, both lead based and lead …

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