Spec

Melting

point

Tensile strength

Extensibility

Rate of spread

Usage

Sn100

232

20

43

70

Electroplating anode bar

Sn-Cu0.7

227

30

45

70

Lower cost, high melting point, poor wetting, low caplillarity, poor fatigue property, can be used for low requirements soldering.

Sn-Ag3.5

222

38

54

75

Higher cost,

SnAg3.0Cu0.5

217

40

58

78

Higer cost, good performance, first choice by most of factories.

SnAg0.3Cu0.5

SnAg3.5Cu0.7