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STOL® 76M R410

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Description

STOL® 76M is an optimized CuNiSi alloy that can be hardened by cold forming and by precipitation of NiSi-phases during a heat treatment. It has excellent bendability, excellent hot and cold forming properties, a high strength and a good corrosion resistance. Due to the NiSi-precipitations the relaxation properties, even at temperatures up to 150°C are excellent. In combination with a tin coating even at temperatures around 150°C (3.000h) the tin coating does not peel off.

Equivalent Materials

This material data has been provided by Matmatch.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValue

Density

23.0 °C

8.9 g/cm³

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Mechanical

PropertyTemperatureValueComment

Bendability 180°, bw

23.0 °C

0.5 [-]

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r = x t, t <0.5mm

Bendability 180°, gw

23.0 °C

1 [-]

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r = x t, t <0.5mm

Bendability 90°, bw

23.0 °C

0 [-]

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r = x t, t <0.5mm

Bendability 90°, gw

23.0 °C

0 [-]

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r = x t, t <0.5mm

Elastic modulus

23.0 °C

118 - 135 GPa

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depending on the condition

Elongation A50

23.0 °C

9 - 11 %

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Hardness, Vickers

23.0 °C

125 - 155 [-]

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Tensile strength

23.0 °C

410 - 470 MPa

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Yield strength Rp0.2

23.0 °C

360 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

300.0 °C

1.68E-5 1/K

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for 20°C to the mentioned temperature

Specific heat capacity

23.0 °C

377 J/(kg·K)

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Thermal conductivity

23.0 °C

260 W/(m·K)

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Electrical

PropertyValue

Specific Electrical conductivity

57 % IACS

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Chemical properties

PropertyValue

Copper

Balance

Nickel

1.4 - 1.7 %

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Other

0 - 0.5 %

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Silicon

0.2 - 0.35 %

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Tin

0.02 - 0.3 %

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Zinc

0.35 - 0.5 %

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Technological properties

Property
Application areas

Automotive: Switches and Relays, Contacts, Connectors, Terminals, Press fits. Electrical: Switches and Relays, Contacts, Connectors, Terminals, Press fits, Components for the electrical industry, Stamped parts, Semiconductor Components.

Brazing

Excellent

Cold Forming

Excellent

Corrosion properties

STOL® 76M has good corrosion resistance, The alloy is insensitive to stress corrosion cracking

Heat Treatment

Temper: R410

Hot forming

at 750-950°C, excellent

Machining

Rating 20, less suitable

Other

This alloy is in accordance with RoHS 2002/96/CE for electric & electronic equipments and 2002/53/CE for automotive industry.

Plating

Electroplating is excellent

Welding

Gas Shielded Arc Welding: Excellent, Laser Welding: Fair