Coin Blanks Brochure - Jindal Stainless
Monthly
Stainless
Trivia

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 MATERIALSDIN DESIGNATIONMAIN ELEMENTSDENSITY
Kg/dm 3
VICKERS
HARDNESS
Cupronickel 25CuNi 25Cu 75%, Ni 25%8.980
Nickel silver 20CuNi20Zn15Cu 65%, Ni 20%, Zn 15%8.785
Nickel silver 18CuNi18Zn20Cu 62%, Ni 18%, Zn 20%8.785
Nickel silver 15CuNi15Zn25Cu 60%, Ni 15%, Zn 25%8.785
Nickel silver 12CuNi12Zn24Cu 64%, Ni 12%, Zn 24%8.785
Nickel silver 9CuNi9Zn10Cu 81%, Ni 9%, Zn 10%8.7570
Nickel silver 6CuNi5.5Zn24.5Cu 70%, Ni 5.5%, Zn 24.5%8.785
Brass 70/30CuZn30Cu 70%, Zn 30%8.575
Brass 64/36CuZn36Cu 64%, Zn 36%8.485
Nickel-brass -5CuZn20NiCu 75%, Zn 20%, Ni 5%8.770
Nickel-brass -1CuZn20NiCu 75%, Zn 20%, Ni 5%8.770
Aluminium-Nickel-Bronze 6CuA1Ni2Cu 92%, A1 6%, Ni 2%8.185
Ferritic SS- AISI430X8Cr17Fe 83%, Cr 17%7.7160

BI-METAL BLANKS COMBINATION

EXTERNAL RINGS
Stainless steel AISI 430White
Cupronickel type CuNi25White
Cupronickel type CuNi25White
Bronze type CuAI6Ni2Golden
Bronze type CuAI6Ni2Golden
Bronze type CuZn2.5Sn0.5Reddish
INSERTS
Bronze type CuAI6Ni2Golden
Bronze type CuAI6Ni2Golden
Cupronickel type CuNi25White
Bronze type CuZn2.5Sn0.5Reddish
Bronze type CuZn2.5Sn0.5Reddish
Bronze type CuAI6Ni2Golden

PRODUCT DETAILS: COIN BLANKS

THICKNESS RANGE12 TO 30 MM
THICKNESS RANGE0.85 TO 2.5 MM

PROCESS FLOW DIAGRAM
FOR COIN BLANKS: