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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


Compressive (Crushing) Strength

120 MPa 18 x 103 psi

Elastic (Young's, Tensile) Modulus

56 GPa 8.1 x 106 psi

Poisson's Ratio


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


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

Tin (Sn)Sn 82.3 to 85
Copper (Cu)Cu 7.5 to 8.5
Antimony (Sb)Sb 7.5 to 8.5
Lead (Pb)Pb 0 to 0.35
Arsenic (As)As 0 to 0.1
Iron (Fe)Fe 0 to 0.080
Bismuth (Bi)Bi 0 to 0.080
Cadmium (Cd)Cd 0 to 0.050
Aluminum (Al)Al 0 to 0.0050
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 B23: Standard Specification for White Metal Bearing Alloys (Known Commercially as Babbitt Metal)