According to my old Engineers Charts the following figures are given: Copper coldworked (the hardest type) Tensile strength 17 - 25 Tons psi Hardness 80 -100 Brinnel
Phosphor Bronze Tensile strength 15 - 20 tons psi Hardness 170 -180 Brinnel Mild steel Tensile strength 25 -34 tons psi Hardness 125 - 175 Brinnel Hard facing Hardness 700 - 800 Brinnel I point this out not say there is anything wrong with what you say, but to show that the points even in phosphor bronze will wear very quickly. Obviously this is what is wanted to spread the copper into the ground, I would not expect the points to last long. David C ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, 3 March 2002 6:38 PM Subject: Re: Copper garden tools, ..still > > In a message dated 3/2/02 11:23:17 PM, [EMAIL PROTECTED] writes: > > << Frank, Steve, : does it repulse worms/microlife, or over-ridingly benefit > in water-retention properties? > > Should we be that concerned ....as Schauberger seemed to be? >> > > No worms and soil flora and fauna will not be repulsed but encouraged. > Schauberger recommended phosphor-bronze, almost as hard as steel...sstorch > >
