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Solder & Low-Melting Alloy Pb58Sn40Sb2 AS-SOLDERED

Heat-treated state

ISO 9453-134

Reference condition for joint design: strength governed by intermetallic layer and joint geometry, and drops sharply above ~100 °C.

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Values for the AS-SOLDERED condition

What is Pb58Sn40Sb2 AS-SOLDERED?

Pb58Sn40Sb2 AS-SOLDERED is Pb58Sn40Sb2 heat treated to AS-SOLDERED — reference condition for joint design: strength governed by intermetallic layer and joint geometry, and drops sharply above ~100 °C. Pb58Sn40Sb2 AS-SOLDERED has a yield strength of 32 MPa (4.64 ksi) and a tensile strength of 42 MPa (6.09 ksi) — stronger than 73% of solder & low-melting alloy grades. Elongation at break is 35% and the elastic modulus is 27 GPa (3.92 Msi). Pb58Sn40Sb2 AS-SOLDERED has a density of 9.3 g/cm³ (0.336 lb/in³), heavier than 64% of solder & low-melting alloy grades. It melts at 185°C (365 °F).

Pb58Sn40Sb2 AS-SOLDERED properties

Typical room-temperature values for Pb58Sn40Sb2 AS-SOLDERED; 4 are specific to this condition. Other listed values are Pb58Sn40Sb2 reference data and may not represent this condition. Bars are the position among solder & low-melting alloy grades.

Physical3

Pb58Sn40Sb2 AS-SOLDERED has a density of 9.3 g/cm³ (0.336 lb/in³), heavier than 64% of solder & low-melting alloy grades. It melts at 185°C (365 °F).

Density9.3 g/cm³0.34 lb/in³
Melting Point (Solidus)185°C365 °F
Liquidus Temperature231°C448 °F

Mechanical10

Pb58Sn40Sb2 AS-SOLDERED has a yield strength of 32 MPa (4.64 ksi) and a tensile strength of 42 MPa (6.09 ksi) — stronger than 73% of solder & low-melting alloy grades. Elongation at break is 35% and the elastic modulus is 27 GPa (3.92 Msi).

Elastic (Young's) Modulus27 GPa3.9 Msi
Shear Modulus9.8 GPa1.4 Msi
Bulk Modulus45 GPa6.5 Msi
Poisson's Ratio0.4
Tensile Strength (Ultimate)42 MPa6.1 ksi
Yield Strength (0.2% offset)32 MPa4.6 ksi
Elongation at Break35%
Shear Strength30 MPa4.4 ksi
Fatigue Strength (Endurance Limit)12 MPa1.7 ksi
Hardness, Brinell15 HB

Thermal6

Pb58Sn40Sb2 AS-SOLDERED is rated for continuous service to 100°C (212 °F). It conducts heat at 43 W/m·K (24.8 BTU/hr·ft·°F), worse than 56% of solder & low-melting alloy grades. Thermal expansion is 25.5 µm/m·K (14.2 µin/in·°F).

Thermal Conductivity43 W/m·K24.8 BTU/hr·ft·°F
Specific Heat Capacity176 J/kg·K0.04 BTU/lb·°F
Thermal Expansion (CTE, 20–100 °C)25.5 µm/m·K14.2 µin/in·°F
Latent Heat of Fusion42 J/g18.1 BTU/lb
Max Service Temperature (continuous)100°C212 °F
Min Service Temperature-60°C-76 °F

Electrical3

Pb58Sn40Sb2 AS-SOLDERED conducts electricity at 10.5 % IACS, better than 60% of solder & low-melting alloy grades.

Electrical Conductivity10.5 % IACS
Electrical Resistivity1.64×10⁻⁷ Ω·m6.46 µΩ·in
Magnetic Responsenon-magnetic

Chemical & Environmental3

Corrosion resistance is fair (45/100), worse than 52% of solder & low-melting alloy grades.

Galvanic Potential (seawater, vs SCE)-0.5 V
Corrosion ResistanceFair45/100
Chemical Resistance SummaryStable in neutral water, most oils and dry atmospheres; attacked by organic acids (acetic, formic), dilute nitric/hydrochloric acid and ammonia; flux residues must be removed to avoid long-term corrosion of the joint.

Sustainability4

Producing a kilogram of Pb58Sn40Sb2 AS-SOLDERED takes about 143 MJ of energy and emits 9.5 kg of CO₂ — less than 60% of solder & low-melting alloy grades. Typical recycled content is 40%.

Embodied Energy (primary production)143 MJ/kg61,479 BTU/lb
Embodied Carbon (primary production)9.5 kg CO₂/kg
Embodied Water320 L/kg38.3 gal/lb
Typical Recycled Content40%

Manufacturability7

Pb58Sn40Sb2 AS-SOLDERED's machinability is fair (35/100, better than 58% of solder & low-melting alloy grades); weldability poor (20/100); formability excellent (90/100).

MachinabilityFair35/100
WeldabilityPoor20/100
Formability (cold)Excellent90/100
CastabilityExcellent88/100
Brazeability / SolderabilityExcellent90/100
PolishabilityPoor30/100
Anodizing Responsen/a — not an anodizable alloy system

Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.

Working with Pb58Sn40Sb2 AS-SOLDERED

Is Pb58Sn40Sb2 easy to machine?

Extremely soft and gummy — use very sharp positive-rake tools, high speed, low feed and generous lubricant; parts are normally cast, extruded or stamped rather than machined.

Can Pb58Sn40Sb2 be welded?

Not fusion-welded; joints are made by soldering at 250–320 °C pot/iron temperature with rosin (R/RMA/RA) or inorganic flux — avoid overheating to limit Sb-rich dross.

Can Pb58Sn40Sb2 be formed, bent or molded?

Casts easily into bars and preforms and extrudes/rolls to wire, ribbon and foil at room temperature; the wide 185–231 °C pasty range allows wiped and swept joints.

What surface finishes work on Pb58Sn40Sb2?

Joints should be flux-residue cleaned (isopropanol or saponified aqueous wash); solder surfaces can be brush-brightened but do not anodize or take durable plating, and lead content requires RoHS/REACH-compliant labelling.

Pb58Sn40Sb2 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.

ElementSpec limit (wt %)Nominal
Sntin39.5 – 40.540
Sbantimony strengthener1.5 – 2.52
Biimpurity limit≤ 0.1
Cuimpurity limit≤ 0.08
Agimpurity limit≤ 0.05
Feimpurity limit≤ 0.02
Asimpurity limit≤ 0.03
Znimpurity limit≤ 0
Alimpurity limit≤ 0
Cdimpurity limit≤ 0
Pbbalance leadbalance

Pb58Sn40Sb2 AS-SOLDERED — frequently asked

What is Pb58Sn40Sb2 AS-SOLDERED used for?

Pb58Sn40Sb2 AS-SOLDERED is typically used for plumbing under load, sheet metal structural joints and mechanical fasteners. In short: creep-resistant 40/60 solder; wide pasty range for wiping; load-bearing plumbing grade.

What is the yield strength of Pb58Sn40Sb2 AS-SOLDERED?

Pb58Sn40Sb2 AS-SOLDERED has a typical yield strength of 32 MPa (4.64 ksi) and a tensile strength of 42 MPa (6.09 ksi) — stronger than 73% of solder & low-melting alloy grades.

Is Pb58Sn40Sb2 AS-SOLDERED easy to machine?

Not especially — machinability is rated fair (35/100, better than 58% of solder & low-melting alloy grades). Extremely soft and gummy — use very sharp positive-rake tools, high speed, low feed and generous lubricant; parts are normally cast, extruded or stamped rather than machined.

Can Pb58Sn40Sb2 AS-SOLDERED be welded?

Not readily — weldability is rated poor (20/100). Not fusion-welded; joints are made by soldering at 250–320 °C pot/iron temperature with rosin (R/RMA/RA) or inorganic flux — avoid overheating to limit Sb-rich dross.

What surface finishes work on Pb58Sn40Sb2 AS-SOLDERED?

Joints should be flux-residue cleaned (isopropanol or saponified aqueous wash); solder surfaces can be brush-brightened but do not anodize or take durable plating, and lead content requires RoHS/REACH-compliant labelling.

Can Pb58Sn40Sb2 AS-SOLDERED be formed, bent or molded?

Casts easily into bars and preforms and extrudes/rolls to wire, ribbon and foil at room temperature; the wide 185–231 °C pasty range allows wiped and swept joints.

What is the maximum service temperature of Pb58Sn40Sb2 AS-SOLDERED?

Pb58Sn40Sb2 AS-SOLDERED is rated for continuous use to about 100°C (212 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.

Sources

  1. EN ISO 9453 — Soft solder alloys: chemical composition and forms (alloy 134, S-Pb58Sn40Sb2) — ISO/CEN (2020)
  2. ASTM B32 — Standard Specification for Solder Metal — ASTM International (2020)
  3. GB/T 3131 (2020)
  4. ASM Handbook Vol. 3 — Alloy Phase Diagrams / Solder alloy property tables — ASM International (1992)
  5. ASM Handbook Vol. 6 — Welding, Brazing and Soldering (soldering section) — ASM International (1993)
  6. Antimonial 40/60 solder bar and wire technical data — solder producer datasheets (e.g. Nihon Superior / AIM / ) (2023)

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.