Bronze Square Bar C954 Aluminum Bronze is one of the strongest and of the copper based bearing alloys. Its aluminum additive provides most of its strength, which permits this alloy to be used at unit loads up to 50 percent higher than those of the leaded-tin alloy C932. Because of its high strength, however, it has fairly low ductility and does not conform or embed well. C954 Aluminum Bronze does not have the anti-seizing properties of C932 Bearing Bronze, but it does, however, have excellent corrosion resistance and has superior elevated temperature strength.