Grade 3 (L13840) Tin-Base Babbitt Metal
Grade 3 Babbitt Metal is a tin alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. L13840 is the UNS number for this material. Additionally, the ASTM designation is Babbitt Grade 3.
It has a fairly low density among the alloys in the same category in the database.
The graph bars on the material properties cards below compare grade 3 Babbitt Metal 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
27
Compressive (Crushing) Strength
120 MPa 18 x 103 psi
Elastic (Young's, Tensile) Modulus
56 GPa 8.1 x 106 psi
Poisson's Ratio
0.35
Shear Modulus
21 GPa 3.0 x 106 psi
Tensile Strength: Yield (Proof)
46 MPa 6.6 x 103 psi
Thermal Properties
Latent Heat of Fusion
79 J/g
Melting Completion (Liquidus)
420 °C 790 °F
Melting Onset (Solidus)
240 °C 460 °F
Specific Heat Capacity
230 J/kg-K 0.056 BTU/lb-°F
Thermal Expansion
21 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
70 % relative
Density
7.4 g/cm3 460 lb/ft3
Embodied Carbon
12 kg CO2/kg material
Embodied Energy
200 MJ/kg 84 x 103 BTU/lb
Embodied Water
1210 L/kg 140 gal/lb
Common Calculations
Resilience: Unit (Modulus of Resilience)
19 kJ/m3
Stiffness to Weight: Axial
4.2 points
Stiffness to Weight: Bending
17 points
Alloy Composition
| Sn | 82.3 to 85 | |
| Cu | 7.5 to 8.5 | |
| Sb | 7.5 to 8.5 | |
| Pb | 0 to 0.35 | |
| As | 0 to 0.1 | |
| Fe | 0 to 0.080 | |
| Bi | 0 to 0.080 | |
| Cd | 0 to 0.050 | |
| Al | 0 to 0.0050 | |
| Zn | 0 to 0.0050 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B23: Standard Specification for White Metal Bearing Alloys (Known Commercially as Babbitt Metal)