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ISO Solder Alloy 134 (Pb58Sn40Sb2)

Solder alloy 134 is a lead-based soldering alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 134 is the ISO numeric designation for this material. Older literature may refer to this material as S-Pb58Sn40Sb2, but this is now discouraged.

It has the highest base cost among lead-based solder alloys. In addition, it has a moderately high heat capacity and a moderately high electrical conductivity.

The graph bars on the material properties cards below compare solder alloy 134 to: lead-based solder alloys (top), all alloys in the same category (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

31 GPa 4.4 x 10⁶ psi

Elongation at Break

31 %

Poisson's Ratio

0.4

Shear Modulus

11 GPa 1.6 x 10⁶ psi

Tensile Strength: Ultimate (UTS)

38 MPa 5.5 x 10³ psi

Thermal Properties

Latent Heat of Fusion

41 J/g

Melting Completion (Liquidus)

230 °C 450 °F

Melting Onset (Solidus)

190 °C 370 °F

Specific Heat Capacity

170 J/kg-K 0.040 BTU/lb-°F

Thermal Conductivity

45 W/m-K 26 BTU/h-ft-°F

Thermal Expansion

26 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

10 % IACS

Electrical Conductivity: Equal Weight (Specific)

9.6 % IACS

Otherwise Unclassified Properties

Base Metal Price

100 % relative

Density

9.6 g/cm³ 600 lb/ft³

Embodied Carbon

8.5 kg CO₂/kg material

Embodied Energy

140 MJ/kg 62 x 10³ BTU/lb

Embodied Water

820 L/kg 98 gal/lb

Common Calculations

Stiffness to Weight: Axial

1.8 points

Stiffness to Weight: Bending

11 points

Strength to Weight: Axial

1.1 points

Strength to Weight: Bending

2.6 points

Thermal Diffusivity

28 mm²/s

Thermal Shock Resistance

3.4 points

Alloy Composition

Lead (Pb)Pb		56.5 to 58.5
Tin (Sn)Sn		39.5 to 40.5
Antimony (Sb)Sb		2.0 to 2.4
Bismuth (Bi)Bi		0 to 0.25
Silver (Ag)Ag		0 to 0.1
Indium (In)In		0 to 0.1
Copper (Cu)Cu		0 to 0.080
Gold (Au)Au		0 to 0.050
Arsenic (As)As		0 to 0.030
Iron (Fe)Fe		0 to 0.020
Nickel (Ni)Ni		0 to 0.010
Cadmium (Cd)Cd		0 to 0.0050
Aluminum (Al)Al		0 to 0.0010
Zinc (Zn)Zn		0 to 0.0010