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
0.35
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
Density
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
| Sn | 90 to 93 | |
| Sb | 5.0 to 7.5 | |
| Cu | 1.5 to 3.0 | |
| Pb | 0 to 0.050 | |
| As | 0 to 0.050 | |
| Fe | 0 to 0.015 | |
| 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