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Type 2 (L13912) Sheet Pewter

Type 2 pewter is a tin alloy. L13912 is the UNS number for this material. Additionally, the ASTM designation is Powter Type 2. It has a fairly low density and can have a moderately low tensile strength among alloys in the same category.

The properties of Type 2 pewter include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare Type 2 pewter to: tin 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

Brinell Hardness

13 to 23

Elastic (Young's, Tensile) Modulus

52 GPa 7.5 x 106 psi

Poisson's Ratio


Shear Modulus

19 GPa 2.8 x 106 psi

Tensile Strength: Ultimate (UTS)

52 to 68 MPa 7.6 to 9.8 x 103 psi

Thermal Properties

Latent Heat of Fusion

69 J/g

Melting Completion (Liquidus)

300 °C 560 °F

Melting Onset (Solidus)

240 °C 470 °F

Specific Heat Capacity

220 J/kg-K 0.054 BTU/lb-°F

Thermal Expansion

21 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

75 % relative


7.3 g/cm3 460 lb/ft3

Embodied Carbon

12 kg CO2/kg material

Embodied Energy

210 MJ/kg 89 x 103 BTU/lb

Embodied Water

1220 L/kg 150 gal/lb

Common Calculations

Stiffness to Weight: Axial

3.9 points

Stiffness to Weight: Bending

17 points

Strength to Weight: Axial

2.0 to 2.6 points

Strength to Weight: Bending

4.3 to 5.1 points

Thermal Shock Resistance

3.4 to 4.4 points

Alloy Composition

Tin (Sn)Sn 90 to 93
Antimony (Sb)Sb 5.0 to 7.5
Copper (Cu)Cu 1.5 to 3.0
Lead (Pb)Pb 0 to 0.050
Arsenic (As)As 0 to 0.050
Iron (Fe)Fe 0 to 0.015
Zinc (Zn)Zn 0 to 0.0050

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B560: Standard Specification for Modern Pewter Alloys