Solder & Low-Melting Alloy In100 vs Wood's Metal
Solder & Low-Melting Alloy · grade comparison
Solder & Low-Melting Alloy In100 and Wood's Metal are both solder & low-melting alloy grades. Wood's Metal is the stronger of the two: yield strength 25 MPa (3.63 ksi) against 0.8 MPa (0.116 ksi) for In100, about 31 times as much; tensile strength follows at 42 MPa (6.09 ksi) vs 3 MPa (0.377 ksi). In exchange, In100 is the more ductile: elongation 40% versus 25% for Wood's Metal, and Wood's Metal is harder (11 HB vs 1 HB). In100 is lighter (7.31 g/cm³ vs 9.7 g/cm³ for Wood's Metal) and In100 is stiffer (11 GPa vs 9.7 GPa). On the shop floor, Wood's Metal machines more easily (fair vs poor) and In100 welds better (very good vs poor).
In100Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
Wood's MetalChoose it when strength drives the design, or when the part is machined in volume.
In100 vs Wood's Metal: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Hardness, Brinell
Reduction in Area
Compressive Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Vickers
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).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Machinability Rating (AISI 1212 = 100 %)
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 | In100 | Wood's Metal |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
In100 vs Wood's Metal — frequently asked
Is Wood's Metal stronger than In100?
Yes. Wood's Metal has a typical yield strength of 25 MPa (3.63 ksi) against 0.8 MPa (0.116 ksi) for In100 — about 31 times as much. Tensile strength is 42 MPa (6.09 ksi) vs 3 MPa (0.377 ksi).
Which is cheaper, In100 or Wood's Metal?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, In100 or Wood's Metal?
Wood's Metal. Its machinability rates fair (35/100) against poor (15/100) for In100; for welding the order is In100 first (very good, 80/100) then Wood's Metal (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in In100 and Wood's Metal 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.