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Home/Reference Data/Binary Phase Diagrams/Pb-Sn/eutectic

Eutectic — Pb-Sn

Alloy System
Pb-Sn
Invariant Point Or Boundary
Eutectic
Component 1 Name
Sn
Component 2 Name
Pb
Composition 1 Wt Pct (wt%)
61.9
Engineering Significance
Classic Electronics solder; Lowest Melting Point in system; Excellent Wettability
Phase Alpha
Alpha Pb
Phase Beta
Beta Sn
Phase Description
Liquid -> Alpha (Pb-rich) + Beta (Sn-rich); Fine Lamellar Eutectic (tinman's solder)
Reaction Type
Eutectic
Temperature C (C)
183

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Pb-Sn — invariant point or boundary eutectic · engineering significance Classic electronics solder; lowest melting point in system; excellent… · phase description Liquid -> alpha (Pb-rich) + beta (Sn-rich); fine lamellar eutectic (tinman's… · composition 1 wt pct 61.9 wt% · phase alpha alpha_Pb | Binary Phase Diagrams | Engineering Database