Mehta Distributors

Mehta Distributors

Soni Bazar, Rajkot, Gujarat
08046083613
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Master Alloys For Yellow Gold

 

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SP 184/1 Master Alloy
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SP 184/1 Master Alloy

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Colour   : Yellow Std. 4N [18 carat] / Standard Yellow [20-22 carat]

Melting Temp of Alloy      : 880 0C

Application: The alloy SP 184/1 a trouble free, all-purpose alloy with right combination of grain refiners and deoxidizers. This ensures a fine grain structure even after several stages of annealing in the wire drawing or any other cold working process. It is a perfect blend for colour and hardness for 20-22 carat jewellery; for both hand-made and investment cast jewellery. Not only that, the alloy SP 184/1 is also recommended for the use in 18 carat cast jewellery.

Recommended Practice:           18K                                    22K

Application                             : Casting / H-made           Casting / H-made

Alloying Temp.                        : 10200C - 10500C            10500C - 10700C

Casting Temp.                         : 10 00C - 10300C             10400C - 10600C

Flask Temp. [Normal Cast]       : 6300C - 6600C                6400C - 6600C

Flask Temp. [Stone Cast]          : 6100C - 6300C                6200C - 6400C

Quenching Time                      : 10 - 20 minutes.            15 - 25 minutes

Notes:
The actual casting temperatures and flask temperatures shall be decided by the parameters like the section thickness of the items (thick, medium or thin), the overall size/bulk of the cast tree, the design intricacies etc.
As a thumb rule, for thinner sections higher temperatures are selected and for thicker sections lower temperatures are preferred. At the same time, designs demanding higher form filling capabilities, higher than normal temperatures are an obvious choice.
The 18 carat casings have a tendency to get hardened and subsequently give problems of cracking especially when flasks are cooled very slowly. For this reason, it is recommended that the flasks are cooled as fast as permitted by the quality of diamonds and also by the design parameters.
Pre-Alloying is strongly recommended simply to ensure better homogeneity in castings as well as in hand made products. Also, for still better results, pre-alloying in an inert atmosphere is always preferred.
Cast Tree Cleaning & Drying procedure: After primary removal of the investment during quenching, submerge tree in a hot (80-100oC) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air.

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SP 181 Indian Yellow Master Alloy
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SP 181 Indian Yellow Master Alloy

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Carat     : 18 - 22

Colour    : Indian Yellow

Melting Temp of Alloy      : 890 0C             

Application: The alloy SP 181 is the most widely used alloy for diamond jewellery. It imparts right set of properties which helps artisans to achieve firm diamond setting. It also gives a colour which is popular for 18 carat diamond studded Indian jewellery.

Recommended Practice:                  18K                                    22K        

Application                                : Casting /H-made           Casting / H-made

Alloying Temp.                           : 10400C - 10600C            10600C - 10800C

Casting Temp.                           : 10200C - 10500C            10500C - 10700C

Flask Temp. [Normal Cast]          : 6300C - 6500C                6400C - 6600C

Flask Temp. [Stone Cast]           : 6100C - 6300C                6200C - 6400C

Quenching Time                        : 10 - 15 minutes.            15 - 25 minutes

Notes:
The actual casting temperatures and flask temperatures shall be decided by the parameters like the section thickness of the items (thick, medium or thin), the overall size/bulk of the cast tree, the design intricacies etc.
As a thumb rule, for thinner sections higher temperatures are selected and for thicker sections lower temperatures are preferred. At the same time, designs demanding higher form filling capabilities, higher than normal temperatures are an obvious choice.
The 18 carat casings have a tendency to get hardened and subsequently give problems of cracking especially when flasks are cooled very slowly. For this reason, it is recommended that the flasks are cooled as fast as permitted by the quality of diamonds and also by the design parameters.
Pre-Alloying is strongly recommended simply to ensure better homogeneity in castings as well as in hand made products. Also, for still better results, pre-alloying in an inert atmosphere is always preferred.
Cast Tree Cleaning & Drying procedure: After primary removal of the investment during quenching, submerge tree in a hot (80-100oC) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air.

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SP 141 American Yellow
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SP 141 American Yellow

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Carat                              : 10 - 14

Colour                            : American Yellow

Melting Temp of Alloy      : 890 0C                                

Application: The alloy SP 141 is the most widely used alloy for diamond set jewellery. It imparts yellow colour that is very popular in export market. It is usable from 10 to 14 carat investment cast jewellery. It ensures smooth surface finish and porosity-free finished products.  Reusability of the castings is also very satisfactory.

Recommended Practice:                10K                                    14K 

Application                                : Casting                         Casting / H-made

Alloying Temp.                           : 10100C - 10200C            10300C - 10400C

Casting Temp.                           : 9800C - 10000C              10100C - 10300C

Flask Temp. [Normal Cast]         : 6200C - 6400C                6200C - 6400C

Flask Temp. [Stone Cast]           : 5800C - 6200C                5800C - 6200

Quenching Time                        : 15 - 20 minutes.            15 - 20 minutes

 Notes:
 Pre-Alloying is strongly recommended simply to ensure better homogeneity in castings as well as in hand made products. Also, for still better results, pre-alloying in an inert atmosphere is always preferred.
The actual casting temperatures and flask temperatures shall be decided by the parameters like the section thickness of the items (thick, medium or thin), the overall size/bulk of the cast tree, the design intricacies etc.
As a thumb rule, for thinner sections higher temperatures are selected and for thicker sections lower temperatures are preferred. At the same time, designs demanding higher form filling capabilities, higher than normal temperatures are an obvious choice.
Cast Tree Cleaning & Drying procedure: After primary removal of the investment during quenching, submerge tree in a hot (80-100oC) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air.
For reusing the castings we recommend 60% fresh carat gold with 40% castings.

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SP 145/1 American Yellow Master Alloy
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SP 145/1 American Yellow Master Alloy

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Carat         : 9 - 14

Colour       : Deep Yellow

Melting Temp of Alloy      : 840 0C                      

Application: The alloy SP 145/1 is meant for deep yellow colour which is popular in western markets. It is usable from 9 to 14 carat investment cast jewellery. It imparts the desired softness, smooth surface finish and porosity-free finished product.

Recommended Practice:              10K                    14K                   

Application                                : Casting                     Casting

Casting Temp [Thin pcs.]             : 10300C – 10500C  10100C - 10300C

                     [Medium pcs.]      : 10200C – 10400C  10000C - 10200C

                     [Thick pcs.]          : 10100C – 10300C  10000C - 10200C

Flask Temp. [Normal Cast]           : 6200C - 6400C        6200C - 6400C       

Flask Temp. [Stone Cast]             : 6000C - 6200C        6000C - 6200C         

Quenching Time                          : 20 - 25 minutes.   20 - 25 minutes    

Notes:
Pre-Alloying is strongly recommended simply to ensure better homogeneity in castings as well as in hand made products. Also, for still better results, pre-alloying in an inert atmosphere is always preferred.
The actual casting temperatures and flask temperatures shall be decided by the parameters like the section thickness of the items (thick, medium or thin), the overall size/bulk of the cast tree, the design intricacies etc.
As a thumb rule, for thinner sections higher temperatures are selected and for thicker sections lower temperatures are preferred. At the same time, designs demanding higher form filling capabilities, higher than normal temperatures are an obvious choice.
Cast Tree Cleaning & Drying procedure: After primary removal of the investment during quenching, submerge tree in a hot (80-100oC) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air.
For reusing the castings we recommend 60% fresh carat gold with 40% castings.

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SP 182/2 Yellow, Std. 3 N Master Alloy
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SP 182/2 Yellow, Std. 3 N Master Alloy

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Carat     : 18 

Colour   : Yellow Std.3N

Melting Temp of Alloy      : 860 0C                         

Application: The alloy SP 182/2 is meant for a perfect combination of colour and softness for 18 carat jewellery. It is usable for both hand-made and investment cast jewellery. The castings are perfect with smooth and bright surface finish and free from porosity.

Recommended Practice:              18K

Application                                : Casting / H-made         

Alloying Temp.                           : 10200C - 10500

Casting Temp.                            : 10300C - 10500

Flask Temp. [Normal Cast]          : 6400C - 6600C     

Flask Temp. [Stone Cast]           : 6200C - 6400C     

Quenching Time                        : 10 - 15 minutes.

Notes:
The actual casting temperatures and flask temperatures shall be decided by the parameters like the section thickness of the items (thick, medium or thin), the overall size/bulk of the cast tree, the design intricacies etc.
As a thumb rule, for thinner sections higher temperatures are selected and for thicker sections lower temperatures are preferred. At the same time, designs demanding higher form filling capabilities, higher than normal temperatures are an obvious choice.
The 18 carat casings have a tendency to get hardened and subsequently give problems of cracking especially when flasks are cooled very slowly. For this reason, it is recommended that the flasks are cooled as fast as permitted by the quality of diamonds and also by the design parameters.Pre-Alloying is strongly recommended simply to ensure better homogeneity in castings as well as in hand made products. Also, for still better results, pre-alloying in an inert atmosphere is always preferred.
Cast Tree Cleaning & Drying procedure: After primary removal of the investment during quenching, submerge tree in a hot (80-100oC) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air. 

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SP 183/2 Yellow Master Alloy
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SP 183/2 Yellow Master Alloy

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Carat     : 18 - 22

Colour    : Indian Yellow

Melting Temp of Alloy      : 870 0C                         

Application: The alloy SP 183/2 is an ideal choice for hand-made and investment cast jewellery, usable from 18 to 22 carat. It is suitable for jewellery manufactured for both Indian as well as Western markets. It gives desired softness in 18 carat; and with its good fluidity it ensures very sound and porosity-free cast finished products.

Recommended Practice:                      18K                              22K 

Application                                : Casting / H-made           Casting / H-made

Alloying Temp.                           : 10000C - 10300C            10400C - 10600C

Casting Temp.                            : 9800C - 10200C              10200C - 10400C

Flask Temp. [Normal Cast]          : 6400C - 6600C                6400C - 6500C

Flask Temp. [Stone Cast]           : 6200C - 6400C                6200C - 6400C

Quenching Time                        : 10 - 15 minutes.            15 - 25 minutes

Notes:
Pre-Alloying is strongly recommended simply to ensure better homogeneity in castings as well as in hand made products. Also, for still better results, pre-alloying in an inert atmosphere is always preferred.
The actual casting temperatures and flask temperatures shall be decided by the parameters like the section thickness of the items (thick, medium or thin), the overall size/bulk of the cast tree, the design intricacies etc.
As a thumb rule, for thinner sections higher temperatures are selected and for thicker sections lower temperatures are preferred. At the same time, designs demanding higher form filling capabilities, higher than normal temperatures are an obvious choice.
The 18 carat casings have a tendency to get hardened and subsequently give problems of cracking especially when flasks are cooled very slowly. For this reason, it is recommended that the flasks are cooled as fast as permitted by the quality of diamonds and also by the design parameters.
Cast Tree Cleaning & Drying procedure: After primary removal of the investment during quenching, submerge tree in a hot (80-100oC) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air.
For reusing the castings we recommend 60% fresh carat gold with 40% castings. 

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SP 221 Yellow Std. 2 N - 18ct. Master Alloy
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SP 221 Yellow Std. 2 N - 18ct. Master Alloy

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Carat      : 18 - 22

Colour     : Rich Indian Yellow

Melting Temp of Alloy      : 940 0C

Application: The alloy SP 221 is meant for a rich yellow colour which is popular in Indian jewellery. It has a good blend of deoxidizers and grain refiners, which makes it an all-purpose alloy, usable from 18 to 22 carat, and for both hand-made and investment cast jewellery.

Recommended Practice:                  18K                                    22K

Application                                : Casting / H-made                   Casting / H-made

Alloying Temp.                           : 10400C - 10600C            10600C - 10800C

Casting Temp.                           : 10200C - 10400C            10500C - 10700C

Flask Temp. [Normal Cast]          : 6300C - 6600C                6400C - 6600C

Flask Temp. [Stone Cast]            : 6100C - 6300C                6200C - 6400C

Quenching Time                        : 10 - 20 minutes.            15 - 25 minutes

Notes:
Pre-Alloying is strongly recommended simply to ensure better homogeneity in castings as well as in hand made products. Also, for still better results, pre-alloying in an inert atmosphere is always preferred.
The actual casting temperatures and flask temperatures shall be decided by the parameters like the section thickness of the items (thick, medium or thin), the overall size/bulk of the cast tree, the design intricacies etc.
As a thumb rule, for thinner sections higher temperatures are selected and for thicker sections lower temperatures are preferred. At the same time, designs demanding higher form filling capabilities, higher than normal temperatures are an obvious choice.
The 18 carat casings have a tendency to get hardened and subsequently give problems of cracking especially when flasks are cooled very slowly. For this reason, it is recommended that the flasks are cooled as fast as permitted by the quality of diamonds and also by the design parameters.
Cast Tree Cleaning & Drying procedure: After primary removal of the investment during quenching, submerge tree in a hot (80-100oC) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air.
For reusing the castings we recommend 60% fresh carat gold with 40% castings.

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SP 222/1 Master Alloy

SP 222/1 Master Alloy

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SP 220/2 Master Alloy

SP 220/2 Master Alloy

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SP 141/3 Yellow Master Alloys

SP 141/3 Yellow Master Alloys

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SP 146 Pale Yellow, Std. 1 N Master Alloys

SP 146 Pale Yellow, Std. 1 N Master Alloys

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SP 171 Yellow Master Alloy

SP 171 Yellow Master Alloy

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SP 172 Yellow

SP 172 Yellow

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SP 173 Reddish Yellow Master Alloy

SP 173 Reddish Yellow Master Alloy

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SP 221/2 Rich Indian Yellow Master Alloy

SP 221/2 Rich Indian Yellow Master Alloy

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SP 223 Yellow (Hard Alloy)

SP 223 Yellow (Hard Alloy)

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Extra Hard  Yellow Alloy
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Extra Hard Yellow Alloy

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SP 111 Yellow (Extra Hard Alloy)

Additional Information:
  • Item Code: SP-111
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Mehta Distributors A-11, Zaveri Chambers, Behind Golden, Soni Bazar, Behind Golden, Soni Bazar,
Rajkot-360001, Gujarat, India

Munjal Mehta ( Proprietor )
08046083613Call Response Rate: 77%
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