Coin Blanks Brochure - High-Quality Solutions by Jindal Stainless
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    Customized Coin Blanks

    in any material, shape, size, and colour

    Coin Blanks

    READY-TO-STRIKE COIN BLANKS

    A coin blank is a metal disc ready for striking. The blank is punched in its round form from a metal strip, and then processed through a rimming machine, which raises the edge rims on the blank and turns it into a coin blank.

    Mono Metal Blanks

    These are punched out from a solid metal strip of copper, copper alloy or stainless steel.

    Coin Blanks

    Copper Based Alloys

    These are made from metal alloys based on copper. Alloying elements can be nickel, tin, aluminium, etc. Alloying means mixing two or more metals. Base metals are over 50% of the alloy.

    Copper Based Alloys

    Bi-Metal Blanks

    These are produced from two different metals that normally have different colours. Bi-metal blanks can be produced from steel blanks and copper alloy blanks as well as from two different colour copper alloys.

    Coin Blanks

    OFFERED SERVICES

    Jindal Stainless Limited offers technical assistance to mints for them achieve an excellent end-product.

    Advice on design to complement existing series, alterations, and renewals along with the introduction of new coins and coin series.

    Development of ideas in the form of new coin denominations.

    Sampling of coinage alloys.

    INFRASTRUCTURAL EXCELLENCE

    Testing Equipment

    • Optical Emission
    • Spectrometer
    • XRF machines
    • Electron microscopes
    • Tensile & hardness tester
    • Surface roughness tester
    • Profile Projectors

    Mechanical Testing

    • Preparing samples
    • Tensile tests
    • Elasticity tests
    • Elongation tests
    • Hardness tests
    • Bending yield limit

    Chemical Laboratory

    • Chemical composition of raw material
    • Controlling production processes (casting, rolling, annealing, cleaning, finishing, etc.)
    • Checking quality finished products

    THE MOST POPULAR ALLOYS

    COINAGE MATERIALS DIN DESIGNATION MAIN ELEMENTS DENSITY
    Kg/dm 3    		 VICKERS
    HARDNESS
    Cupronickel 25 CuNi 25 Cu 75%, Ni 25% 8.9 80
    Nickel silver 20 CuNi20Zn15 Cu 65%, Ni 20%, Zn 15% 8.7 85
    Nickel silver 18 CuNi18Zn20 Cu 62%, Ni 18%, Zn 20% 8.7 85
    Nickel silver 15 CuNi15Zn25 Cu 60%, Ni 15%, Zn 25% 8.7 85
    Nickel silver 12 CuNi12Zn24 Cu 64%, Ni 12%, Zn 24% 8.7 85
    Nickel silver 9 CuNi9Zn10 Cu 81%, Ni 9%, Zn 10% 8.75 70
    Nickel silver 6 CuNi5.5Zn24.5 Cu 70%, Ni 5.5%, Zn 24.5% 8.7 85
    Brass 70/30 CuZn30 Cu 70%, Zn 30% 8.5 75
    Brass 64/36 CuZn36 Cu 64%, Zn 36% 8.4 85
    Nickel-brass -5 CuZn20Ni Cu 75%, Zn 20%, Ni 5% 8.7 70
    Nickel-brass -1 CuZn20Ni Cu 75%, Zn 20%, Ni 5% 8.7 70
    Aluminium-Nickel-Bronze 6 CuA1Ni2 Cu 92%, A1 6%, Ni 2% 8.1 85
    Ferritic SS- AISI430 X8Cr17 Fe 83%, Cr 17% 7.7 160

    BI-METAL BLANKS COMBINATION

    EXTERNAL RINGS
    Stainless steel AISI 430 White
    Cupronickel type CuNi25 White
    Cupronickel type CuNi25 White
    Bronze type CuAI6Ni2 Golden
    Bronze type CuAI6Ni2 Golden
    Bronze type CuZn2.5Sn0.5 Reddish
    INSERTS
    Bronze type CuAI6Ni2 Golden
    Bronze type CuAI6Ni2 Golden
    Cupronickel type CuNi25 White
    Bronze type CuZn2.5Sn0.5 Reddish
    Bronze type CuZn2.5Sn0.5 Reddish
    Bronze type CuAI6Ni2 Golden

    PRODUCT DETAILS: COIN BLANKS

    THICKNESS RANGE 12 TO 30 MM
    THICKNESS RANGE 0.85 TO 2.5 MM

    PROCESS FLOW DIAGRAM
    FOR COIN BLANKS:

    Coin Blanks Brochure