Solder & Low-Melting Alloy Sn63Pb37Sb vs Sn92Cu6Ag2
Solder & Low-Melting Alloy · grade comparison
Solder & Low-Melting Alloy Sn63Pb37Sb and Sn92Cu6Ag2 are both solder & low-melting alloy grades. Both yield at about 38 MPa — strength does not separate them. Sn63Pb37Sb is the more ductile: elongation 32% versus 22% for Sn92Cu6Ag2, and Sn92Cu6Ag2 is harder (18 HB vs 16 HB). Sn92Cu6Ag2 is lighter (7.35 g/cm³ vs 8.4 g/cm³ for Sn63Pb37Sb) and Sn92Cu6Ag2 is stiffer (50 GPa vs 32 GPa).
Sn63Pb37SbChoose it when the part is bent, formed or impact-loaded.
Sn92Cu6Ag2Choose it when weight is the constraint, or when the part sees heat.
Sn63Pb37Sb vs Sn92Cu6Ag2: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all solder & low-melting alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all solder & low-melting alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Tensile Strength (Ultimate) 58 MPa8.4 ksi · Yield Strength (0.2% offset) 38 MPa5.5 ksi
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.5 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every solder & low-melting alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Sn63Pb37Sb | Sn92Cu6Ag2 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Sn63Pb37Sb vs Sn92Cu6Ag2 — frequently asked
What is the difference between Sn63Pb37Sb and Sn92Cu6Ag2?
Solder & Low-Melting Alloy Sn63Pb37Sb and Sn92Cu6Ag2 are both solder & low-melting alloy grades. Both yield at about 38 MPa — strength does not separate them. Sn63Pb37Sb is the more ductile: elongation 32% versus 22% for Sn92Cu6Ag2, and Sn92Cu6Ag2 is harder (18 HB vs 16 HB).
Which is cheaper, Sn63Pb37Sb or Sn92Cu6Ag2?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Sn63Pb37Sb or Sn92Cu6Ag2?
Sn92Cu6Ag2, by a small margin. Both rate poor for machinability — 25/100 against 20/100 for Sn63Pb37Sb.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Sn63Pb37Sb and Sn92Cu6Ag2 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.