If you have a knife edge (dual sided at 45°, 1/8" thick, and you want as little deformation as possible under a 50 lb. load, what would be the ideal alloy? Harden steel? Tungsten? High carbon steel? Application: two point guitar tremolo, total tension being around 100 lbs. Looking for low malleability, shatter resistance, high corrosion resistance to salt, and no oxidation to air. Second point of contact, second type of alloy needed: Looking for least friction possible, slightly higher malleability. This is metal on metal contact, with no lubrication to help.