SAE J473a Grade 7A

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Description

Generally for joining steel and copper base alloys, Class A only for galvanized steel or zinc. Lead-tin solders are not recommended for joining aluminium, magnesium, or stainless steel.

Related Standards

This material data has been provided by SAE.

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.

Ashby charts

Properties

Thermal

PropertyTemperatureValueComment

Melting point

185 - 320 °C

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Typical for Lead Tin

Specific heat capacity

23.0 °C

213 - 239 J/(kg·K)

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Typical for Lead Tin

Thermal conductivity

23.0 °C

35 - 57 W/(m·K)

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Typical for Lead Tin

Chemical properties

PropertyValueComment

Aluminium

5E-3 %

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Antimony

0.4 %

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Bismuth

0.25 %

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Copper

0.08 %

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In dipping solders, 0.5% max copper is permissible

Iron

0.02 %

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Tin

49 - 51 %

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Zinc

5E-3 %

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