Converting Bhn to Alloy Ratios - Not On the Normal Tables
Is there - What is ... the formula to convert a Brinell Hardness number to a given 1:X alloy ratio of Sn and Pb?
Here is the best Brinell Hardness Table from Fr Frog's website ... http://www.frfrogspad.com/miscellm.htm#Brinell
I have never seen a table with the alloy ratios greater than 1:40. If one wants to determine the corresponding Bhn to say, 1:11 or 1:15 or even 1:50, etc ... what is the formula?
I've done my homework looking and have not been able to determine what the conversion formula is. There has to be such a formula otherwise 1:30 would not be designated with a Bhn of 9.0 as an example
RotoMetals has this formula for adding tin and antimony to obtain harder alloys but have not found the formula starting with dead soft PB, then adding Sn to derive the Bhn number
Basic Rules for Harding Lead-
For every 1% additional tin, Brinell hardness increases 0.3.
For every 1% additional antimony, Brinell hardness increases 0.9.
For a simple equation,
Brinell = 8.60 + ( 0.29 * Tin ) + ( 0.92 * Antimony )
1 Attachment(s)
Alloy Calculator New/Updates
Hi there,
I use the alloy calculator Jess started but have made some changes. See Attached:
Cheers,
James