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Solder & Low-Melting Alloy B23 Grade 10 vs B23 Grade 8

Solder & Low-Melting Alloy · grade comparison

Solder & Low-Melting Alloy B23 Grade 10 and B23 Grade 8 are both solder & low-melting alloy grades. B23 Grade 10 is the stronger of the two: tensile strength 60 MPa (8.7 ksi) against 55 MPa (7.98 ksi) for B23 Grade 8, about 9% more. On the shop floor, B23 Grade 10 sits in a lower cost tier (premium, $$$) than B23 Grade 8 (high, $$$$).

B23 Grade 10Choose it when strength drives the design, or when cost is the deciding factor.

B23 Grade 10 vs B23 Grade 8: properties

B23 Grade 10B23 Grade 8

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

28 GPa4.1 Msi
29 GPa4.2 Msi

Shear Modulus

10 GPa1.5 Msi
10.5 GPa1.5 Msi

Bulk Modulus

40 GPa5.8 Msi
45 GPa6.5 Msi

Tensile Strength (Ultimate)

60 MPa8.7 ksi
55 MPa8 ksi

Shear Strength

35 MPa5.1 ksi
33 MPa4.8 ksi

Fatigue Strength (Endurance Limit)

20 MPa2.9 ksi
18 MPa2.6 ksi

Charpy V-Notch Impact (RT)

2 J1.5 ft·lbf
—

Hardness, Brinell

21 HB
20 HB

Hardness, Vickers

22 HV
—

Same in both: Poisson's Ratio 0.42 · Yield Strength (0.2% offset) 26 MPa3.8 ksi · Elongation at Break 3% · Compressive Strength 108 MPa15.7 ksi

Physical

Density and transition temperatures.

Density

10 g/cm³0.36 lb/in³
10.04 g/cm³0.36 lb/in³

Liquidus Temperature

270°C518 °F
272°C522 °F

Same in both: Melting Point (Solidus) 240°C464 °F

Thermal

How each material carries heat and how hot it can run.

Specific Heat Capacity

146 J/kg·K0.03 BTU/lb·°F
145 J/kg·K0.03 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

24 µm/m·K13.3 µin/in·°F
26 µm/m·K14.4 µin/in·°F

Latent Heat of Fusion

42 J/g18.1 BTU/lb
40 J/g17.2 BTU/lb

Min Service Temperature

-50°C-58 °F
-40°C-40 °F

Same in both: Thermal Conductivity 24 W/m·K13.9 BTU/hr·ft·°F · Max Service Temperature (continuous) 120°C248 °F

Electrical

Conductivity and insulation.

Electrical Conductivity

5.7 % IACS
5.6 % IACS

Electrical Resistivity

3×10⁻⁷ Ω·m11.8 µΩ·in
3.1×10⁻⁷ Ω·m12.2 µΩ·in

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Same in both: Galvanic Potential (seawater, vs SCE) -0.55 V · Corrosion Resistance 40 / 100

Manufacturability

FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.

Machinability Rating (AISI 1212 = 100 %)

90%
200%

Weldability

15 / 100
20 / 100

Formability (cold)

20 / 100
25 / 100

Castability

90 / 100
92 / 100

Brazeability / Solderability

85 / 100
88 / 100

Same in both: Machinability 90 / 100 · Polishability 60 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

21 MJ/kg9,028 BTU/lb
28 MJ/kg12,038 BTU/lb

Embodied Carbon (primary production)

1.8 kg CO₂/kg
2.2 kg CO₂/kg

Embodied Water

75 L/kg9 gal/lb
110 L/kg13.2 gal/lb

Typical Recycled Content

65%
70%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

6 kN·m/kg
5 kN·m/kg

Specific Stiffness (E / density)

2.8 MN·m/kg
2.9 MN·m/kg

Thermal Diffusivity

16.4 mm²/s
16.5 mm²/s

Same in both: Modulus of Resilience 12 kJ/m³ · Thermal Shock Resistance Index 2

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.

125102050891011Density (g/cm³)Yield strength (MPa) — log scaleB23 Grade 10B23 Grade 8

Manufacturing and finishing

CapabilityB23 Grade 10B23 Grade 8
Default condition——
Relative cost$$$ Premium$$$$ High
Min. machined wall——
Best machined surface——

B23 Grade 10 vs B23 Grade 8 — frequently asked

Is B23 Grade 10 stronger than B23 Grade 8?

Yes. B23 Grade 10 has a typical tensile strength of 60 MPa (8.7 ksi) against 55 MPa (7.98 ksi) for B23 Grade 8 — about 9% more.

Which is cheaper, B23 Grade 10 or B23 Grade 8?

B23 Grade 10 is the lower-cost material: it sits in the premium tier ($$$) while B23 Grade 8 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.

Which welds better, B23 Grade 10 or B23 Grade 8?

B23 Grade 8. Its weldability rates poor (20/100) against poor (15/100) for B23 Grade 10.

Ready to make it?

Upload a CAD file and FabDigit prices the part in B23 Grade 10 and B23 Grade 8 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.