Solder & Low-Melting Alloy Bi50Pb25Sn12.5Cd12.5 Cast
Grade · default condition
also Cerrobend
Cast = as cast
Standard condition: melt at 80–100 °C and pour into the tube, fixture or mould; measure/use within hours before age growth.
Values for the Cast condition
Other Bi50Pb25Sn12.5Cd12.5 tempers and conditions
Bi50Pb25Sn12.5Cd12.5 is listed in 2 conditions; see the grade overview at Bi50Pb25Sn12.5Cd12.5.
- Cast
- CAST-AGED
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
CastDefaultThis page As cast | Standard condition: melt at 80–100 °C and pour into the tube, fixture or mould; measure/use within hours before age growth. | 26 | 44 | 50 | 10 HB | 3.2 % IACS |
Cast and age-stabilised (held ~30 days at room temperature) | Pick when dimensional stability matters: the bismuth-rich alloy grows slightly for weeks after casting, so masters and gauge fillers are aged before final machining. | 30 | 48 | 30 | 12 HB | 3.2 % IACS |
What is Bi50Pb25Sn12.5Cd12.5 Cast?
Bi50Pb25Sn12.5Cd12.5 Cast is Bi50Pb25Sn12.5Cd12.5 in the Cast grade — standard condition: melt at 80–100 °C and pour into the tube, fixture or mould; measure/use within hours before age growth. Bi50Pb25Sn12.5Cd12.5 Cast has a yield strength of 26 MPa (3.77 ksi) and a tensile strength of 44 MPa (6.38 ksi) — weaker than 55% of solder & low-melting alloy grades. Elongation at break is 50% and the elastic modulus is 10 GPa (1.45 Msi). Bi50Pb25Sn12.5Cd12.5 Cast has a density of 9.6 g/cm³ (0.347 lb/in³), heavier than 66% of solder & low-melting alloy grades. It melts at 70°C (158 °F).
Advantages
- Ductile — tolerates forming and impact — 50%, better than 92% of solder & low-melting alloy grades
Limitations
- Low stiffness — 10 GPa (1.45 Msi), worse than 98% of solder & low-melting alloy grades
- Limited service temperature — 40°C (104 °F), worse than 97% of solder & low-melting alloy grades
- Low electrical conductivity — 3.2 % IACS, worse than 97% of solder & low-melting alloy grades
- Poor heat conductor — 18.8 W/m·K (10.9 BTU/hr·ft·°F), worse than 94% of solder & low-melting alloy grades
Bi50Pb25Sn12.5Cd12.5 Cast properties
Typical room-temperature values for Bi50Pb25Sn12.5Cd12.5 Cast; 18 are specific to this condition. Other listed values are Bi50Pb25Sn12.5Cd12.5 reference data and may not represent this condition. Bars are the position among solder & low-melting alloy grades.
Physical3
Bi50Pb25Sn12.5Cd12.5 Cast has a density of 9.6 g/cm³ (0.347 lb/in³), heavier than 66% of solder & low-melting alloy grades. It melts at 70°C (158 °F).
Mechanical11
Bi50Pb25Sn12.5Cd12.5 Cast has a yield strength of 26 MPa (3.77 ksi) and a tensile strength of 44 MPa (6.38 ksi) — weaker than 55% of solder & low-melting alloy grades. Elongation at break is 50% and the elastic modulus is 10 GPa (1.45 Msi).
Thermal6
Bi50Pb25Sn12.5Cd12.5 Cast is rated for continuous service to 40°C (104 °F). It conducts heat at 18.8 W/m·K (10.9 BTU/hr·ft·°F), worse than 94% of solder & low-melting alloy grades. Thermal expansion is 24 µm/m·K (13.3 µin/in·°F).
Electrical3
Bi50Pb25Sn12.5Cd12.5 Cast conducts electricity at 3.2 % IACS, worse than 97% of solder & low-melting alloy grades.
Chemical & Environmental3
Corrosion resistance is fair (40/100), worse than 82% of solder & low-melting alloy grades.
Sustainability4
Producing a kilogram of Bi50Pb25Sn12.5Cd12.5 Cast takes about 92 MJ of energy and emits 6.5 kg of CO₂ — less than 72% of solder & low-melting alloy grades. Typical recycled content is 70%.
Manufacturability8
Bi50Pb25Sn12.5Cd12.5 Cast's machinability is fair (45/100, better than 69% of solder & low-melting alloy grades); weldability poor (15/100); formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Bi50Pb25Sn12.5Cd12.5 Cast
Is Bi50Pb25Sn12.5Cd12.5 easy to machine?
Machines like soft lead — very sharp positive-rake tools, light cuts, flood coolant to keep the part below ~40 °C, and expect smearing rather than chips.
Can Bi50Pb25Sn12.5Cd12.5 be welded?
Not fusion-welded in the usual sense; joints are made by remelting the alloy itself at 80–100 °C, and it wets clean steel, brass and copper readily with rosin flux.
Can Bi50Pb25Sn12.5Cd12.5 be formed, bent or molded?
Best used as a casting alloy: melt in a water- or oil-jacketed pot at 80–100 °C (never above ~200 °C, cadmium fume), pour into warmed silicone/steel moulds; near-zero shrinkage gives sharp replication.
What surface finishes work on Bi50Pb25Sn12.5Cd12.5?
No plating or anodizing; surfaces are left as-cast or burnished, and parts should be washed and handled with gloves because of lead/cadmium contamination.
Bi50Pb25Sn12.5Cd12.5 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 |
|---|---|---|
| PbRoHS-restricted | 24 – 26 | 25 |
| Sn | 12 – 13 | 12.5 |
| CdRoHS-restricted; toxic fume hazard on overheating | 12 – 13 | 12.5 |
| Others (each)impurities Cu, Zn, Fe, Sb typically <0.05 % each | ≤ 0.05 | — |
| Bibalance bismuth | ≥ 49 (balance) | — |
Bi50Pb25Sn12.5Cd12.5 Cast — frequently asked
What is Bi50Pb25Sn12.5Cd12.5 Cast used for?
Bi50Pb25Sn12.5Cd12.5 Cast is typically used for fire sprinkler fusible links, safety plugs, pattern/mold making, metal casting demonstrations and temperature fuses. In short: 70 °C melting point; near-zero casting shrinkage; contains lead and cadmium.
What is the yield strength of Bi50Pb25Sn12.5Cd12.5 Cast?
Bi50Pb25Sn12.5Cd12.5 Cast has a typical yield strength of 26 MPa (3.77 ksi) and a tensile strength of 44 MPa (6.38 ksi) — weaker than 55% of solder & low-melting alloy grades. Strength varies by condition: see the 2 listed tempers.
Is Bi50Pb25Sn12.5Cd12.5 Cast easy to machine?
Reasonably — machinability is rated fair (45/100, better than 69% of solder & low-melting alloy grades). Machines like soft lead — very sharp positive-rake tools, light cuts, flood coolant to keep the part below ~40 °C, and expect smearing rather than chips.
Can Bi50Pb25Sn12.5Cd12.5 Cast be welded?
Not readily — weldability is rated poor (15/100). Not fusion-welded in the usual sense; joints are made by remelting the alloy itself at 80–100 °C, and it wets clean steel, brass and copper readily with rosin flux.
What surface finishes work on Bi50Pb25Sn12.5Cd12.5 Cast?
No plating or anodizing; surfaces are left as-cast or burnished, and parts should be washed and handled with gloves because of lead/cadmium contamination.
Can Bi50Pb25Sn12.5Cd12.5 Cast be formed, bent or molded?
Best used as a casting alloy: melt in a water- or oil-jacketed pot at 80–100 °C (never above ~200 °C, cadmium fume), pour into warmed silicone/steel moulds; near-zero shrinkage gives sharp replication.
What is the maximum service temperature of Bi50Pb25Sn12.5Cd12.5 Cast?
Bi50Pb25Sn12.5Cd12.5 Cast is rated for continuous use to about 40°C (104 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys, Low-Melting (Fusible) Alloys — ASM International (1990)
- ASTM B774 — Standard Specification for Low Melting Point Alloys — ASTM International (2016)
- Fusible alloy technical data (Cerrobend / 158 °F alloy) — Cerro / Indium Corporation (2022)
- Bi-Pb-Sn-Cd eutectic thermophysical data — CRC Handbook of Chemistry and Physics (2021)
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.