Copper and Aluminium based Alloys

Rolled products for industrial applications with excellent mechanical strength and corrosion resistance.

KME produces sheets and discs for many applications, including the minting of coins, as the 10, 20 and 50 Euro cent coins are made from a special Cu-Al alloy rolled product called Nordic Gold (CuAl5Zn55Sn1).

Below are some examples of materials we manufacture. For specific requests, please contact us directly.

MATERIALS
DIN EN	CEN	ASTM	JIS
CuAl10Ni5Fe4	CW 307 G	C63000	C 6301
CuAl5Zn5Sn1	-	-	-

SHEETS
Thickness (mm)	Width (mm)	Length (mm)	Temper
15 - 22	500 - 1000	500 < 2000*	Annealed
22 - 140	200 - 1800*	500 < 4000*	Annealed

DISCS
Thickness (mm)	Diameter (mm)	Surface
>15 - 22	300 - 1500 Machined only around diameter	Heavy plate surface
>22 - 70	300 - 2900 Machined on all sides	Available roughness Ra 12.5 µm Ra 6.3 µm (others upon request)

*Different sizes are available upon request

STRIPS FOR THE MINTING OF COINS

Copper-aluminium strips are the base material for the 10, 20 and 50 Euro cent coins. It is a special alloy (CuAl5Zn5Sn1), also called Nordic Gold because it's similar in colour to gold and because it was already used for the Swedish 10 corona coin. It was chosen for the new European coins because of its good minting characteristics, corrosion resistance, its matchless colour and its special electromagnetic properties that allow it to be perfectly recognized in vending machines.

Visit the minting section of this website to find out more.

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