Resources

Gold

  • 9ct Y Bench
    • Alloy Composition   37.6% AU (AG/CU/ZN)
      Colour   Light Yellow
      Melting Range   880 – 900°C
      Solders   9ct EE,E,M & H YELLOW
      Specific Gravity   11.2
      Annealing Colour   Dull Cherry Red


      Best used for
      •  Bench Work
      •  Rolling

      Hints, Tips & Uses
      •  General purpose yellow gold alloy.
      •  Good setting properties
      •  Due to the presence of zinc, this alloy may not perform satisfactory when enamelled
      •  Can be quenched for maximum ductility
      •  When melting, use a soft flame to avoid zinc burnout which will cause discolouration (red) and cracking

  • 9ct Y Casting
    • Alloy Composition   37.6% AU (AG/CU/ZN/SI)
      Colour   Pale Yellow
      Melting Range   980 – 1020°C
      Solders   9ct E,M & H YELLOW
      Specific Gravity   12.88
      Annealing Colour    


      Best used for
      •  Casting

      Hints, Tips & Uses
      •  Versatile casting alloy with good fluidity and form filling properties
      •  Due to the presence of zinc, this alloy may not perform satisfactory when enamelled
      •  If used for bench work, the metal cracks & becomes hard

  • 9ct W Nickel
    • Alloy Composition   37.6% AU (AG/NI/CU/ZN)
      Colour   Bright White
      Melting Range   980 – 1040°C
      Solders   9ct M WHITE
      Specific Gravity   13.78
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Casting
      •  Rolling

      Hints, Tips & Uses
      •  Nickel content conforms to international standards and is magnetic
      •  Do not use for piercing components
      •  Excellent rolling properties and is good for bangles.
      •  Boric acid flux should be used to keep the metal clean during the melting process. The molten metal should be mixed well with a stirring rod before pouring to assure a good mix. Remove the ingot from the mold & allow to air cool (which will allow the alloy to be much softer) – do not quench. Soak in a hot pickling solution to remove surface oxides

  • 9ct W 7% Palladium
    • Alloy Composition   37.6% AU (AG/PD/ZN)
      Colour   Dull White
      Melting Range   980 – 1050°C
      Solders   9ct E,M WHITE & 960
      Specific Gravity   13.7
      Annealing Colour   Dull White


      Best used for
      •  Bench Work
      •  Casting
      •  Rolling

      Hints, Tips & Uses
      •  Versatile metal alloy, more economical than 19% Palladium alloy
      •  Use a softer flame than 19% Pd alloy
      •  Rhodium plate for bright white colour
      •  Casting temperature: 1020°C
      •  Flask temperature: 450-700 °C

  • 9ct W 19% Palladium
    • Alloy Composition   37.6% AU (AG/PD/CU)
      Colour   Grey / White
      Melting Range   1050°C
      Solders   9ct E,M WHITE & 960
      Specific Gravity   14.21
      Annealing Colour   Dull Cherry Red


      Best used for
      •  Bench Work

      Hints, Tips & Uses
      •  Bench work, rolling & setting metal
      •  Deoxidize thoroughly – use reducing flame to prevent blistering during annealing
      •  Can rhodium plate for brilliant white finish

  • 9ct W Nickel Free
    • Alloy Composition   37.6% AU (AG/CU/ZN)
      Colour   Straw White
      Melting Range   1110 °C
      Solders   9ct M WHITE
      Specific Gravity   12.4
      Annealing Colour   Cherry Red


      Best used for
      •  Casting

      Hints, Tips & Uses
      •  Good casting properties
      •  This alloy does not contain Nickel or Palladium
      •  Rhodium plate for bright white colour
      •  Soft alloy, suitable for handwork & casting

  • 9ct R
    • Alloy Composition   37.6% AU (AG/CU)
      Colour   Red
      Melting Range   900 – 960°C
      Solders   9ct E,M & H RED
      Specific Gravity   11.1
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Casting

      Hints, Tips & Uses
      •  General purpose red gold alloy.
      •  Work hardens quickly due to high copper content
      •  Use soft flame when annealing and roll gently
      •  “Air cool” – no quenching
      •  This alloy is age-hardenable

  • 14ct Y Cast
    • Alloy Composition   58.4% AU (AG/CU/ZN/SI)
      Colour   Pale Yellow
      Melting Range   930 – 1020°C
      Solders   14 ct E,M & H YELLOW
      Specific Gravity   14.3
      Annealing Colour    


      Best used for
      •  Casting

      Hints, Tips & Uses
      •  Specialist casting alloy
      •  Easy finish
      •  Good fluidity and form filling properties

  • 14ct Y Bench
    • Alloy Composition   58.4% AU (AG/CU/ZN)
      Colour   Bright Yellow
      Melting Range   850 – 920°C
      Solders   14 ct E,M & H YELLOW
      Specific Gravity   14.3
      Annealing Colour   Dark Red


      Best used for
      •  Bench Work

      Hints, Tips & Uses
      •  Soft metal that rolls well and is good for bench work
      •  Work hardens slowly
      •  Do not melt too often or at too high a temperature – this will cause cracking & the metal to become red and brittle due to zinc burnout
      •  Polishes well and has a good finish

  • 14ct W 18.5% Palladium
    • Alloy Composition   58.4% AU (AG/PD)
      Colour   Good White
      Melting Range   1095 – 1150°C
      Solders   18ct E,M,H WHITE or 960
      Specific Gravity   16.1
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work

      Hints, Tips & Uses
      •  Excellent bench work metal. Anneal well & often
      •  Soft alloy due to high palladium content
      •  Can be used for centrifugal casting
      •  Rhodium plating optional

  • 14ct W Nickel
    • Alloy Composition   58.4% AU (NI/CU/ZN)
      Colour   White
      Melting Range   1220°C
      Solders   18ct E,M WHITE or 960
      Specific Gravity   14.89
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Casting
      •  Rolling

      Hints, Tips & Uses
      •  Multi purpose Nickel alloy, which is magnetic
      •  Always ensure Nickel is mixed thoroughly
      •  Plasticity and workability is good for bench and rolling when the metal is annealed and allowed to cool slowly
      •  The Nickel content conforms to International standards
      •  Anneal & air cool slowly

  • 14ct R
    • Alloy Composition   58.4% AU (AG/CU)
      Colour   Red
      Melting Range   920°C
      Solders   9ct or 18ct E,M RED
      Specific Gravity   15.1
      Annealing Colour   Red


      Best used for
      •  Bench Work

      Hints, Tips & Uses
      •  Anneal as little as possible and allow to air cool
      •  This metal work hardens quickly
      •  This metal is difficult to roll.

  • 18ct Y
    • Alloy Composition   75.2% AU (AG/CU)
      Colour   Light Yellow
      Melting Range   960 – 990°C
      Solders   18ct E,M & H YELLOW
      Specific Gravity   15.96
      Annealing Colour   Dull Cherry Red


      Best used for
      •  Bench Work
      •  Casting
      •  Rolling

      Hints, Tips & Uses
      •  General purpose yellow gold alloy.
      •  Widely used by goldsmiths for all applications

  • 18ct R Bench
    • Alloy Composition   75.2% AU (AG/CU)
      Colour   Red
      Melting Range   890 – 895°C
      Solders   18ct E,M & H RED
      Specific Gravity   15.9
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Casting

      Hints, Tips & Uses
      •  Do not anneal often as cracking can occur. Can be annealled in furnace at 650°C – the time depends on the size of the piece
      •  Alternatively, it may be heated to cherry red and quenched from a black heat for maximum ductility

  • 18ct W Nickel
    • Alloy Composition   75.2% AU (CU/NI/ZN)
      Colour   Grey / White
      Melting Range   1050°C
      Solders   18ct E,M & H WHITE
      Specific Gravity   15.9
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Casting
      •  Rolling

      Hints, Tips & Uses
      •  General purpose white gold alloy
      •  Cool metal slowly
      •  This metal is magnetic, has good rolling properties & good for bangles

  • 18ct W 10% Palladium
    • Alloy Composition   75,5% AU (AG/PD/CU)
      Colour   White
      Melting Range   950°C
      Solders   18ct E,M,H White
      Specific Gravity   16.2
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Casting

      Hints, Tips & Uses
      •  Alloy should be quenched for maximum ductility
      •  Casting temperature: 1220°C
      •  Must rhodium plate for brilliant white finish

  • 18ct W 12% Palladium
    • Alloy Composition   75.2% AU (AG/PD/CU)
      Colour   White
      Melting Range   960°C
      Solders   18ct E,M & H WHITE
      Specific Gravity   16.2
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Casting

      Hints, Tips & Uses
      •  Alloy should be quenched for maximum ductility
      •  High casting temperature = 1340°C
      •  Must rhodium plate for brilliant white finish
      •  Age hardenable alloy – heat to 450°C for 90 minutes

  • 18ct W 12.5% Palladium
    • Alloy Composition   75.2% AU (AG/PD)
      Colour   White
      Melting Range   960°C
      Solders   18ct E,M & H WHITE
      Specific Gravity   16.2
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Rolling

      Hints, Tips & Uses
      •  General purpose white gold alloy
      •  Metal has good setting properties
      •  Alloy should be quenched for maximum ductility
      •  Must rhodium plate for brilliant white finish

  • 18ct W 16% Palladium
    • Alloy Composition   75.2% AU (AG/PD)
      Colour   White
      Melting Range   950°C
      Solders   18ct E,M & H WHITE
      Specific Gravity   16.3
      Annealing Colour   Cherry Red


      Best used for
      •  Bench Work
      •  Rolling

      Hints, Tips & Uses
      •  General all purpose white alloy with high ductility
      •  Softer alloy which is good for setting
      •  Must rhodium plate for brilliant white finish

  • 18ct W Platinum & Palladium
    • Alloy Composition   75.2% AU (PT/PD)
      Colour   Superior White
      Melting Range   1200°C
      Solders   18ct E,M & H WHITE & 960
      Specific Gravity   17.43
      Annealing Colour   Dull Cherry Red


      Best used for
      •  Bench Work
      •  Rolling

      Hints, Tips & Uses
      •  No age hardening needed
      •  Frequent annealing allows for good rolling
      •  Excellent properties for tension setting
      •  If used for casting, use Phosphate Bond investment powder & centrifugal casting system

  • 22ct Y General Purpose
    • Alloy Composition   91.67% AU (AG/CU)
      Colour   Yellow
      Melting Range   1052 – 1063°C
      Solders   18ct E,M & H YELLOW
      Specific Gravity   18
      Annealing Colour   Dull Red


      Best used for
      •  Bench Work

      Hints, Tips & Uses
      •  General all purpose yellow alloy
      •  Softest alloy in gold-copper or silver series

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TEL: +27 (0)21 551 2066
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Germiston

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