All alloys listed on this page can be age hardened (a heat treat process that results in high tensile strength and resistance to wear, and yet does so without any attendant brittleness).

Since MDC-367 (0.5% gold, 1.5% platinum, 44% palladium 38% silver, 15% copper 1% nickel) contains little gold and has a lower specific gravity, it is more economical than DMC-40 (10% gold, 30% silver, 10% platinum, 35% palladium, 14% copper, 1% zinc). However, it too is highly resistant to corrosion and wear.

DMC-372 (1% platinum, 44% palladium 39% silver, 14% copper, 1% zinc, 1% nickel) fills the need for a more economical contact alloy than DMC-40 for nickelchrome resistance wires but with the same properties that emerge after age hardening.

Both DMC-40 and DMC-367 are widely used as Microbrush contact materials (see page 24).

A more truly gold alloy that is also heat treatable to provide excellent spring properties is DMC-337 (72.5% gold, 14% copper, 8.5% platinum, 4% silver, 1% zinc).

Properties of Age Hardenable Materials