JCCO ENTERPRISES JEWELRY CASTING SERVICES

348 CAYUGA  RD. SUITE #1

BUFFALO , N.Y. 14225 - 1927

ph:  (716) 626 0892

fax: (716) 626 6717

www.jccojewelrycastingservices.com

jc@jccojewelrycastingservices.com 

 

JCCO ENTERPRISES Jewelry Casting Services
348 Cayuga Rd.
Buffalo, NY 14225-1927

ph: (716) 626-0892
fax: (716) 626-6717

METAL CONVERSION CHARTS

                                  METAL CONVERSION CHART

                Use this conversion chart to convert the weight of wax to metal and one metal to another

for casting or for calculating  a price.

  

Platinum

F. Gold

18K

14K

10K

Sterling

Wax

Platinum

  1.00

  0.90

  0.70

  0.60

  0.53

  0.48

21.45

F. Gold

  1.11

  1.00

  0.78

  0.67

  0.59

  0.54

19.32

18K

  1.42

  1.28

  1.00

  0.85

  0.76

  0.68

15.50

14K

  1.66

  1.50

  1.17

  1.00

  0.89

  0.80

13.40

10K

  1.88

  1.69

  1.32

  1.13

  1.00

  0.90

11.60

Sterling

  2.06

  1.87

  1.46

  1.25

  1.11

  1.00

10.40

Wax

21.45

19.32

15.50

13.40

11.60

10.40

  1.00

                                       
               Example: Convert wax to metal

               Wax model weight   x   factor of metal wanted    =   weight of metal wanted

                1 DWT. (wax)      x    10.40 (sterling factor)    =   10.40 DWT.    sterling

 

              Example: Finding weight of an object in a different metal than it is now.

 

              Model weight in metal     x   factor of metal wanted    =   weight of metal wanted

              Sterling Ring 10 DWT.    x   1.25 (14K factor)            =    12.50 DWT.    14K

 

              This chart intended to provide a good indication with in a reasonable tolerance.

 

              Use this conversion chart to convert the weight of one metal to another.

                                 Models in non ferrous metals to sterling silver.

Weight of model in

 

Factor

 

Weight in sterling silver

Lead

x

   .917

=

Weight in sterling silver

Pewter

x

1.09

=

Weight in sterling silver

Copper

x

1.16

=

Weight in sterling silver

Brass / Bronze

x

1.18

=

Weight in sterling silver

Tin

x

1.43

=

Weight in sterling silver

Zinc

x

1.46

=

Weight in sterling silver

Aluminum

x

3.85

=

Weight in sterling silver

Magnesium

x

5.98

=

Weight in sterling silver

 

             Example:

             Weight of model in metal   x   factor of the metal   =   weight in S.S.

             Zinc (model)   10 DWT.      x    1.46  (factor)         =   14.6 DWT.  S.S.

 

             This chart intended to provide a good indication with in reasonable tolerance.  

 

             Use this conversion chart to convert the weight of one metal to another.

                                   Models in non ferrous metals to 10K gold.

Weight of model in

 

Factor

 

Weight in 10K gold

Lead

x

1.02

=

Weight in 10K gold

Pewter

x

1.22

=

Weight in 10K gold

Copper

x

1.30

=

Weight in 10K gold

Brass / Bronze

x

1.32

=

Weight in 10K gold

Tin

x

1.59

=

Weight in 10K gold

Zinc

x

1.62

=

Weight in 10K gold

Aluminum

x

4.30

=

Weight in 10K gold

Magnesium

x

6.67

=

Weight in 10K gold

 

             Example:

             Weight of model in metal   x   factor of the metal   =   weight in 10K gold

             Zinc (model)   10 DWT.      x    1.62  (factor)          =   16.2  DWT.  in 10K gold

 

             This chart intended to provide a good  indication with in reasonable tolerance.

 

             Use this conversion chart to convert the weight of one metal to another.

                            Models in non ferrous metals to 14K gold

Weight of model in

 

Factor

 

Weight in 14K gold

Lead

x

1.18

=

Weight in 14K gold

Pewter

x

1.41

=

Weight in 14K gold

Copper

x

1.50

=

Weight in 14K gold

Brass / Bronze

x

1.52

=

Weight in 14K gold

Tin

x

1.84

=

Weight in 14K gold

Zinc

x

1.88

=

Weight in 14K gold

Aluminum

x

4.96

=

Weight in 14K gold

Magnesium

x

7.70

=

Weight in 14K gold

             Example:

             Weight of model in metal    x   factor of the metal     =   weight in 14K gold

             Zinc (model)   10 DWT.       x    1.88  (factor)           =   18.8 DWT.   in 14K gold

 

             This chart intended to provide a good indication with in reasonable tolerance.

 

              Use this conversion chart to convert the weight of one metal to another.

                                   Models in non ferrous metals to 18K gold.

Weight of model in

 

Factor

 

Weight in 18K gold

Lead

x

1.37

=

Weight in 18K gold

Pewter

x

1.63

=

Weight in 18K gold

Copper

x

1.74

=

Weight in 18K gold

Brass / Bronze

x

1.76

=

Weight in 18K gold

Tin

x

2.13

=

Weight in 18K gold

Zinc

x

2.17

=

Weight in 18K gold

Aluminum

x

5.74

=

Weight in 18K gold

Magnesium

x

8.91

=

Weight in 18K gold

 

             Example:

             Weight of model in metal   x   factor of the metal    =   weight in 18K gold

             Zinc (model)   10 DWT.      x    2.17  (factor)          =   21.7  DWT.  in 18K gold

 

             This chart intended to provide a good indication with in reasonable tolerance.

               Use this conversion chart to convert the weight of one metal to another.

                            Models in non ferrous metals to platinum

 

Weight of model in

 

Factor

 

Weight in platinum

Lead

x

1.89

=

Weight in platinum

Pewter

x

2.26

=

Weight in platinum

Copper

x

2.40

=

Weight in platinum

Brass / Bronze

x

2.44

=

Weight in platinum

Tin

x

2.94

=

Weight in platinum

Zinc

x

3.00

=

Weight in platinum

Aluminum

x

7.94

=

Weight in platinum

Magnesium

x

12.33

=

Weight in platinum

          Example:

               Weight of model in metal    x   factor of the metal    =   weight in platinum

               Zinc (model)   10 DWT.      x    3.00  (factor)           =   30.0 DWT.   in platinum

 

               This chart intended to provide a good indication with in reasonable tolerance.

 

               Zinc (model)   10 DWT.      x    3.00  (factor)           =   30.0 DWT.   in platinum

 

               This chart intended to provide a good indication with in reasonable tolerance.

 

 

 

 

                                               SPECIFIC GRAVITY CHART

 

 

Material

Specific gravity

Wax

1.00

Aluminum

2.70

Magnesium

1.74

Pewter

9.50

Brass / Bronze

8.80

Copper

8.92

24K Gold (fine gold)

19.32

18K Gold

15.50

14K Gold

13.40

10K Gold

11.60

Platinum

21.45

Silver (fine silver)

10.49

Sterling Silver

10.40

Tin

7.29

Zinc

7.14

Lead

11.34

 

 

 

 

 

 

 

 

 

 

 

 

 

 

    Copyright JCCO Enterprises. All rights reserved.

    JCCO ENTERPRISES Jewelry Casting Services
    348 Cayuga Rd.
    Buffalo, NY 14225-1927

    ph: (716) 626-0892
    fax: (716) 626-6717