Babbitt Grade 1 (Sn-4.5Sb-4.5Cu) tin-base vs Babbitt Grade 7 (Pb-9.3Sn-15Sb) lead-base
Property comparison of Babbitt Grade 1 (Sn-4.5Sb-4.5Cu) tin-base and Babbitt Grade 7 (Pb-9.3Sn-15Sb) lead-base, both tin alloy.
| Property | Babbitt Grade 1 (Sn-4.5Sb-4.5Cu) tin-base | Babbitt Grade 7 (Pb-9.3Sn-15Sb) lead-base | Difference |
|---|---|---|---|
| Yield strength | 30 MPa | 24 MPa | -20% |
| Tensile strength | 64 MPa | 72 MPa | +13% |
| Elongation | 2 % | 4 % | +100% |
| Density | 7,340 kg/m³ | 10,000 kg/m³ | +36% |
| Brinell hardness | 17 HB | 22.5 HB | +32% |
| Coefficient of thermal expansion | 0.000021 1/K | 0.000026 1/K | +24% |
| Melting point | 297 °C | 254 °C | -14% |
Difference is Babbitt Grade 7 (Pb-9.3Sn-15Sb) lead-base relative to Babbitt Grade 1 (Sn-4.5Sb-4.5Cu) 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 1 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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