Approved DAMAS for North America DAMAS logo

SM20 - 20% Au, Noble Crown and Bridge Alloy, Type IV

SM20 is an economic golden crown and bridge alloy from Strategy Milling. It is suitable for full-cast crowns and bridges, inlays, and onlays.

Advantages

  • Affordable, yellow crown and bridge alloy
  • Rich yellow color
  • Economical due to low density
  • Brilliant high gloss achieved with ease by polishing

Indications

  • Onlays
  • 3/4 crowns
  • Crowns
  • Telescope and conus crowns
  • Root canal post and cores
  • Short- and long-span bridges
  • Inlays and onlays

Composition

  Ag 40.75
  Au 20.0
  Pd 14.0
  In 11.0
  Cu 10.75
  Sn 2.0
  Zn 0.5, Pd 1.0, Ru 1.0

Technical data

Type Noble
Color Yellow
Density (g/cm³) 10.8
Melting range (°C) 750 - 840 C
Casting temperature (°C) 960 - 1020 C
Modulus of Elasticity (MPa) 90
Elongation (%) - As cast 5
Vickers hardness - As cast 195
0.2% proof stress (MPa) - As cast 195
Tensile Strength (MPa) - As cast 570