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Supralloy®

Wieland Supralloy stands for a new generation of bronze strip. Supralloy bronzes are very fine-grained with higher mechanical strength and also good bending properties. The fine-grained structure is achieved through a special thermo-mechanical treatment of our strip in Wieland-B14, Wieland-B16 and Wieland-B18 Supralloy bronzes.

The benefits for you

Very good bending properties and much higher strength
Lower plating costs
Formed contact zones are smoother and make thinner precious-metal layers possible.
Lower costs
Supralloy bronzes are the low-cost alternative to high-performance alloys and hyper-phosphor bronzes.
Wide range of properties
Due to the standardised composition of Supralloy bronzes, they can be used immediately without re-approval.
No critical components
This makes Supralloy bronzes a low-cost alternative to copper beryllium.

Applications

Wieland helps the manufacturers of connectors and electrmechanical components by optimising conventional copper alloys. Thus where conductivity demands can be reduced, expensive high-perfomance alloys can be avoided.

The main advantages of the new Supralloy bronzes Wieland B14, Wieland B16 and Wieland B18 are outstandingly suitable for miniaturised connectors in electronic applications. The fine microstructure means that formed contact areas (e. g. in spoon contacts9 are significantly smoother, which is advantageous for subsequent with precious metals.

Properties

Using the same bending radius Wieland Supralloy gives a much higher strength than standard bronze: The yield strength R_p0,2 is by 100 to 150 MPa higher for Wieland B18 Supralloy, at the same time giving much smoother bending edges.

Wieland	DIN		EN		ASTM	JIS	Electrical conductivity*
*References values in MS/m
	Designation	Number	Designation	Number	UNS-No.	JIS-No.	Electrical conductivity*
Supralloy-Bronze
B14	CuSn4	2.1016	CuSn4	CW450K	C51100	C5111	13.0
B16	CuSn6	2.1020	CuSn6	CW452K	C51900	C5191	10.0
B18	CuSn8	2.1030	CuSn8	CW453K	C52100	C5212	7.5