Solder & Low-Melting Alloy Babbitt Grade 1 (Tin-Base) vs Babbitt Grade 3 (Tin-Base)
Solder & Low-Melting Alloy · grade comparison
Solder & Low-Melting Alloy Babbitt Grade 1 (Tin-Base) and Babbitt Grade 3 (Tin-Base) are both solder & low-melting alloy grades. Babbitt Grade 3 (Tin-Base) is the stronger of the two: yield strength 45 MPa (6.53 ksi) against 30 MPa (4.35 ksi) for Babbitt Grade 1 (Tin-Base), about 50% more; tensile strength follows at 70 MPa (10.2 ksi) vs 66 MPa (9.57 ksi). In exchange, Babbitt Grade 1 (Tin-Base) is the more ductile: elongation 8% versus 3% for Babbitt Grade 3 (Tin-Base), and Babbitt Grade 3 (Tin-Base) is harder (27 HB vs 17 HB). Babbitt Grade 3 (Tin-Base) runs hotter in service (150°C vs 120°C continuous) and Babbitt Grade 1 (Tin-Base) conducts electricity better (9 % IACS vs 8 % IACS).
Babbitt Grade 1 (Tin-Base)Choose it when the part is bent, formed or impact-loaded.
Babbitt Grade 3 (Tin-Base)Choose it when strength drives the design, or when the part sees heat.
Babbitt Grade 1 (Tin-Base) vs Babbitt Grade 3 (Tin-Base): 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.
Babbitt Grade 1 (Tin-Base)Babbitt Grade 3 (Tin-Base)
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Shear Strength
Charpy V-Notch Impact (RT)
Hardness, Vickers
Same in both: Poisson's Ratio 0.33
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
Formability (cold)
Castability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Weldability 20 / 100 · Brazeability / Solderability 95 / 100 · Polishability 70 / 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.
Modulus of Resilience
Thermal Diffusivity
Same in both: Specific Strength (UTS / density) 9 kN·m/kg · Specific Stiffness (E / density) 7.1 MN·m/kg · Thermal Shock Resistance Index 3
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 | Babbitt Grade 1 (Tin-Base) | Babbitt Grade 3 (Tin-Base) |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Babbitt Grade 1 (Tin-Base) vs Babbitt Grade 3 (Tin-Base) — frequently asked
Is Babbitt Grade 3 (Tin-Base) stronger than Babbitt Grade 1 (Tin-Base)?
Yes. Babbitt Grade 3 (Tin-Base) has a typical yield strength of 45 MPa (6.53 ksi) against 30 MPa (4.35 ksi) for Babbitt Grade 1 (Tin-Base) — about 50% more. Tensile strength is 70 MPa (10.2 ksi) vs 66 MPa (9.57 ksi).
Which is cheaper, Babbitt Grade 1 (Tin-Base) or Babbitt Grade 3 (Tin-Base)?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose Babbitt Grade 1 (Tin-Base) over Babbitt Grade 3 (Tin-Base)?
Pick Babbitt Grade 1 (Tin-Base) when the part is bent, formed or impact-loaded. Pick Babbitt Grade 3 (Tin-Base) when strength drives the design, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Babbitt Grade 1 (Tin-Base) and Babbitt Grade 3 (Tin-Base) 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.