UNS C70250 boway

Alternative and trade names
boway 70250
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Description

High strength combined with good electrical conductivity. Very good stress relaxation resistance, good softening resistance as well as good bending formability. Standard HPA for Automotive and Semiconductor.

Equivalent Materials

This material data has been provided by Ningbo Boway Alloy Material.

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

PropertyValue

Density

8.8 g/cm³

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Dimension

PropertyValue

Dimensions

Strip thickness 0.08 - 3.0 mm, other gauges on request. Strip width from 8.5 mm. Hot-dip tinned and electroplated strip available.

Mechanical

PropertyValueTesting StandardComment

Bendability 180°, bw

0.5 [-]

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ASTM B820

R620(TM00) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

2 [-]

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ASTM B820

R655(TM02) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

2 [-]

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ASTM B820

R690(TM03) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

2.5 [-]

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ASTM B820

R760(TM04) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

3.5 [-]

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ASTM B820

R800(TM06) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

Bendability 180°, gw

0.5 [-]

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ASTM B820

R620(TM00) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

1.5 [-]

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ASTM B820

R655(TM02) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

2 [-]

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ASTM B820

R690(TM03) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

2 [-]

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ASTM B820

R800(TM06) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

2.5 [-]

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ASTM B820

R760(TM04) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

Bendability 90°, bw

0 [-]

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EN ISO 7438

R620(TM00) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

0.5 [-]

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EN ISO 7438

R655(TM02) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

1 [-]

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EN ISO 7438

R690(TM03) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

1.5 [-]

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EN ISO 7438

R760(TM04) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

3 [-]

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EN ISO 7438

R800(TM06) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

Bendability 90°, gw

0 [-]

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EN ISO 7438

R620(TM00) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

0.5 [-]

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EN ISO 7438

R655(TM02) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

1 [-]

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EN ISO 7438

R690(TM03) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

1.5 [-]

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EN ISO 7438

R760(TM04) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

2 [-]

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EN ISO 7438

R800(TM06) | bending thickness: ≤ 0.5 mm & bending width: 10 mm

Elastic modulus

130 GPa

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Elongation

1 %

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min. | R800(TM06), A50

2 %

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min. | R760(TM04), A50

5 %

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min. | R690(TM03), A50

6 %

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min. | R607(TR02), A50

7 %

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min. | R655(TM02), A50

14 %

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min. | R620(TM00), A50

Hardness, Vickers

180 - 220 [-]

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R620(TM00) | For reference only

180 - 220 [-]

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R607(TR02) | For reference only

190 - 240 [-]

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R655(TM02) | For reference only

210 - 250 [-]

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R690(TM03) | For reference only

220 - 270 [-]

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R760(TM04) | For reference only

250 - 290 [-]

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R800(TM06) | For reference only

Poisson's ratio

0.33 [-]

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Tensile strength

607 - 726 MPa

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R607(TR02)

620 - 760 MPa

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R620(TM00)

655 - 825 MPa

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R655(TM02)

690 - 860 MPa

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R690(TM03)

760 - 850 MPa

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R760(TM04)

800 - 880 MPa

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R800(TM06)

Yield strength

550 MPa

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min. | R620(TM00)

550 MPa

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min. | R607(TR02)

585 MPa

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min. | R655(TM02)

655 MPa

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min. | R690(TM03)

720 MPa

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min. | R760(TM04)

780 MPa

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min. | R800(TM06)

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

1.76e-05 1/K

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average value between 20-300°C

Specific heat capacity

399 J/(kg·K)

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Thermal conductivity

20 °C

190 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical conductivity

20 °C

0.0026 S/m

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Specific Electrical conductivity

20 °C

45 % IACS

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Chemical properties

PropertyValue

Copper

Balance

Magnesium

0.15 %

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Nickel

3 %

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Silicon

0.65 %

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Technological properties

Property
Application areas

Application target:

Signal ConnectorVery suitable
Power ConnectorSuitable
Miniaturized ConnectorSuitable
Switch / RelayVery suitable
SemiconductorVery suitable


Ideal for miniaturized connector and Lead frame design, special qualities for PRESSFIT, QFP, QFN available.

Chemical composition

The chemical composition is the nominal composition of the alloy

Coating

Electroplating: Good


Hot dip tinning: Good

Cold Forming

Very good

Machining

Not suitable

Packaging size

Standard coils with outside diameters up to 1200 mm. Traverse-wound coils with drum weights up to 500 kg. Multiple-coil up to 3 tons.

Soldering general

Soft soldering: Good

Testings

Fatigue strength:

The fatigue strength is defined as the maximum bending stress amplitude which a material withstands for 10.000.000 load cycles under symmetrical alternate load without breaking. It depends on the temper selected and can be estimated typically by 1/3 of tensile strength. For solid solution fine grain materials fatigue strength might increase up to 0,5 * of tensile strength.


Bending test:

90° bend test According to EN ISO 7438, 180° bend test acc. to ASTM B820, shown values might show orange- peel, however no crack.

Welding

Laser welding: Good


Resistance welding: Average