Babbitt Grade 3 (Sn-8Sb-8Cu) tin-base vs Babbitt Grade 7 (Pb-9.3Sn-15Sb) lead-base
Property comparison of Babbitt Grade 3 (Sn-8Sb-8Cu) tin-base and Babbitt Grade 7 (Pb-9.3Sn-15Sb) lead-base, both tin alloy.
| Property | Babbitt Grade 3 (Sn-8Sb-8Cu) tin-base | Babbitt Grade 7 (Pb-9.3Sn-15Sb) lead-base | Difference |
|---|---|---|---|
| Yield strength | 45 MPa | 24 MPa | -47% |
| Tensile strength | 69 MPa | 72 MPa | +4% |
| Elongation | 1 % | 4 % | +300% |
| Density | 7,460 kg/m³ | 10,000 kg/m³ | +34% |
| Brinell hardness | 27 HB | 22.5 HB | -17% |
| Coefficient of thermal expansion | 0.000022 1/K | 0.000026 1/K | +18% |
| Melting point | 331 °C | 254 °C | -23% |
Difference is Babbitt Grade 7 (Pb-9.3Sn-15Sb) lead-base relative to Babbitt Grade 3 (Sn-8Sb-8Cu) tin-base. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- Grade 3 tin-base
- standard
- ASTM B23
- heat treatment
- chill cast
- grade
- Grade 7 lead-base
- standard
- ASTM B23
- heat treatment
- chill cast
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