Solder & Low-Melting Alloy SnSb12Cu6Pb Centrifugal Cast
Finish state
ISO 4381 SnSb12Cu6Pb
Choose for large journal bearings and shells where dense, pore-free lining and uniform thickness are required.
Values for the Centrifugal Cast condition
Other SnSb12Cu6Pb tempers and conditions
SnSb12Cu6Pb is listed in 3 conditions; see the grade overview at SnSb12Cu6Pb.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Sand-cast / open-mould test bars and bushes | Slow-cooled condition: coarser SbSn cuboids and Cu6Sn5 needles, slightly lower strength — mainly for test bars and thick bushes. | 55 | 85 | 6 | 28 HB | 8.5 % IACS |
AS-CASTDefault As-Cast lining (chill/static cast on steel or bronze backing) | Standard supply condition: alloy melted and cast as a bonded bearing lining, then bored to size. | 60 | 95 | 7 | 30 HB | 9 % IACS |
Centrifugal CastThis page Centrifugally cast lining | Choose for large journal bearings and shells where dense, pore-free lining and uniform thickness are required. | 65 | 100 | 8 | 32 HB | 9 % IACS |
What is SnSb12Cu6Pb Centrifugal Cast?
SnSb12Cu6Pb Centrifugal Cast is SnSb12Cu6Pb supplied in the Centrifugal Cast condition — choose for large journal bearings and shells where dense, pore-free lining and uniform thickness are required. SnSb12Cu6Pb Centrifugal Cast has a yield strength of 65 MPa (9.43 ksi) and a tensile strength of 100 MPa (14.5 ksi) — stronger than 101% of solder & low-melting alloy grades. Elongation at break is 8% and the elastic modulus is 54 GPa (7.83 Msi). SnSb12Cu6Pb Centrifugal Cast has a density of 7.4 g/cm³ (0.267 lb/in³), lighter than 67% of solder & low-melting alloy grades. It melts at 240°C (464 °F). AS-CAST is the default condition FabDigit quotes; Centrifugal Cast is available on request or by drawing note.
Advantages
- High strength — 65 MPa (9.43 ksi), better than 101% of solder & low-melting alloy grades
- Stiff — 54 GPa (7.83 Msi), better than 101% of solder & low-melting alloy grades
- Easy to machine — 90/100, better than 95% of solder & low-melting alloy grades
- Polishes to a fine finish — 70/100, better than 91% of solder & low-melting alloy grades
- High service temperature — 130°C (266 °F), better than 87% of solder & low-melting alloy grades
Limitations
- Limited formability — 20/100, worse than 95% of solder & low-melting alloy grades
- Limited ductility — 8%, worse than 84% of solder & low-melting alloy grades
- High embodied carbon — 18 kg CO₂/kg, worse than 76% of solder & low-melting alloy grades
SnSb12Cu6Pb Centrifugal Cast properties
Typical room-temperature values for SnSb12Cu6Pb Centrifugal Cast; 19 are specific to this condition. Other listed values are SnSb12Cu6Pb reference data and may not represent this condition. Bars are the position among solder & low-melting alloy grades.
Physical3
SnSb12Cu6Pb Centrifugal Cast has a density of 7.4 g/cm³ (0.267 lb/in³), lighter than 67% of solder & low-melting alloy grades. It melts at 240°C (464 °F).
Mechanical13
SnSb12Cu6Pb Centrifugal Cast has a yield strength of 65 MPa (9.43 ksi) and a tensile strength of 100 MPa (14.5 ksi) — stronger than 101% of solder & low-melting alloy grades. Elongation at break is 8% and the elastic modulus is 54 GPa (7.83 Msi).
Thermal6
SnSb12Cu6Pb Centrifugal Cast is rated for continuous service to 130°C (266 °F). It conducts heat at 53 W/m·K (30.6 BTU/hr·ft·°F), better than 75% of solder & low-melting alloy grades. Thermal expansion is 23 µm/m·K (12.8 µin/in·°F).
Electrical3
SnSb12Cu6Pb Centrifugal Cast conducts electricity at 9 % IACS, worse than 54% of solder & low-melting alloy grades.
Chemical & Environmental3
Corrosion resistance is good (56/100), better than 85% of solder & low-melting alloy grades.
Sustainability4
Producing a kilogram of SnSb12Cu6Pb Centrifugal Cast takes about 300 MJ of energy and emits 18 kg of CO₂ — more than 73% of solder & low-melting alloy grades. Typical recycled content is 30%.
Manufacturability8
SnSb12Cu6Pb Centrifugal Cast's machinability is excellent (90/100, better than 95% of solder & low-melting alloy grades); weldability poor (20/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SnSb12Cu6Pb Centrifugal Cast
Is SnSb12Cu6Pb easy to machine?
Bores and faces very easily with sharp, high-rake, well-honed tools, generous clearance and flood oil/soluble coolant; avoid heavy cuts that smear or lift the lining.
Can SnSb12Cu6Pb be welded?
Not fusion welded — repairs are made by re-tinning and re-pouring the lining or by low-temperature babbitt soldering; keep melt below ~450 °C to limit Sb/Sn loss and oxidation.
Can SnSb12Cu6Pb be formed, bent or molded?
Cast, not formed: tin the steel shell (flux + pure tin at ~280–320 °C), pour at roughly 430–480 °C with a chilled backing to give a fine SbSn/Cu6Sn5 structure and thin, well-bonded lining.
What surface finishes work on SnSb12Cu6Pb?
Finish by boring and burnishing to the oil-film clearance; no anodizing — steel backings are tinned or zinc plated, and lining bonds should be ultrasonically or dye-penetrant checked.
SnSb12Cu6Pb chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Sbforms hard SbSn cuboids | 11 – 13 | 12 |
| Cuforms Cu6Sn5 needle skeleton | 5 – 7 | 6 |
| Pbintentional addition per grade designation | 1 – 3 | 2 |
| Asimpurity limit | ≤ 0.1 | — |
| Feimpurity limit | ≤ 0.1 | — |
| Biimpurity limit | ≤ 0.08 | — |
| Znimpurity limit | ≤ 0.01 | — |
| Alimpurity limit | ≤ 0.01 | — |
| Cdimpurity limit | ≤ 0.05 | — |
| Snremainder, approx. 79–83 % | balance | — |
SnSb12Cu6Pb Centrifugal Cast — frequently asked
What is SnSb12Cu6Pb Centrifugal Cast used for?
SnSb12Cu6Pb Centrifugal Cast is typically used for plain bearing shells, gearbox bushings and industrial pump bearings. In short: medium-duty babbitt lining; high embeddability and conformability; cast onto steel shells.
What is the yield strength of SnSb12Cu6Pb Centrifugal Cast?
SnSb12Cu6Pb Centrifugal Cast has a typical yield strength of 65 MPa (9.43 ksi) and a tensile strength of 100 MPa (14.5 ksi) — stronger than 101% of solder & low-melting alloy grades. Strength varies by condition: see the 3 listed tempers.
Is SnSb12Cu6Pb Centrifugal Cast easy to machine?
Yes — machinability is rated excellent (90/100, better than 95% of solder & low-melting alloy grades). Bores and faces very easily with sharp, high-rake, well-honed tools, generous clearance and flood oil/soluble coolant; avoid heavy cuts that smear or lift the lining.
Can SnSb12Cu6Pb Centrifugal Cast be welded?
Not readily — weldability is rated poor (20/100). Not fusion welded — repairs are made by re-tinning and re-pouring the lining or by low-temperature babbitt soldering; keep melt below ~450 °C to limit Sb/Sn loss and oxidation.
What surface finishes work on SnSb12Cu6Pb Centrifugal Cast?
Finish by boring and burnishing to the oil-film clearance; no anodizing — steel backings are tinned or zinc plated, and lining bonds should be ultrasonically or dye-penetrant checked.
Can SnSb12Cu6Pb Centrifugal Cast be formed, bent or molded?
Cast, not formed: tin the steel shell (flux + pure tin at ~280–320 °C), pour at roughly 430–480 °C with a chilled backing to give a fine SbSn/Cu6Sn5 structure and thin, well-bonded lining.
What is the maximum service temperature of SnSb12Cu6Pb Centrifugal Cast?
SnSb12Cu6Pb Centrifugal Cast is rated for continuous use to about 130°C (266 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ISO 4381 — Plain bearings: Lead and tin casting alloys for multilayer plain bearings — ISO (2011)
- ASTM B23 — Standard Specification for White Metal Bearing Alloys (Babbitt) — ASTM (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (Tin and Tin Alloys) — ASM International (1990)
- ASM Handbook Vol. 18 — Friction, Lubrication, and Wear Technology (Bearing Materials) — ASM International (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.