Solder & Low-Melting Alloy Pb58Sn40Sb2
ISO 9453-134
Pb58Sn40Sb2 is an antimony-strengthened tin-lead solder built on the 40/60 ratio, with 2% antimony added for creep resistance in joints under sustained load (32 MPa yield, 48 MPa tensile, 35% elongation, 15 HB).
Reference datasheet — Pb58Sn40Sb2 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Pb58Sn40Sb2 tempers and conditions
Pb58Sn40Sb2 is supplied in one standard condition, AS-SOLDERED.
Supply forms, finishes and certifications
Ways Pb58Sn40Sb2 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
BARDefault | Bar / ingot | Supply form |
FLUX-CORED | Flux-cored wire | Supply form |
FOIL | Foil / ribbon and stamped preforms | Supply form |
WIRE | Solid wire | Supply form |
PASTE | Solder paste | Printing process |
What is Pb58Sn40Sb2?
Pb58Sn40Sb2 is an antimony-strengthened tin-lead solder built on the 40/60 ratio, with 2% antimony added for creep resistance in joints under sustained load (32 MPa yield, 48 MPa tensile, 35% elongation, 15 HB). It is chosen for plumbing and structural sheet metal work where the joint carries load, and is supplied as bar, solid and flux-cored wire, foil and paste. The 185–231 °C pasty range suits wiped joints but slows solidification, service is capped near 110 °C, and the alloy is lead-bearing so RoHS/REACH labelling applies. Pb50Sn50Sb is the alternative when faster wetting and higher tin content are needed. Pb58Sn40Sb2 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 has a yield strength of 32 MPa (4.64 ksi) and a tensile strength of 48 MPa (6.96 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).
What is Pb58Sn40Sb2 used for?
- plumbing under load
- sheet metal structural joints
- mechanical fasteners
Pb58Sn40Sb2 properties
Typical room-temperature values; bars are the position among solder & low-melting alloy grades.
Physical3
Pb58Sn40Sb2 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).
Mechanical10
Pb58Sn40Sb2 has a yield strength of 32 MPa (4.64 ksi) and a tensile strength of 48 MPa (6.96 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).
Thermal6
Pb58Sn40Sb2 is rated for continuous service to 110°C (230 °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).
Electrical3
Pb58Sn40Sb2 conducts electricity at 10.5 % IACS, better than 60% of solder & low-melting alloy grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), worse than 52% of solder & low-melting alloy grades.
Sustainability4
Producing a kilogram of Pb58Sn40Sb2 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%.
Manufacturability7
Pb58Sn40Sb2's machinability is fair (35/100, better than 58% of solder & low-melting alloy grades); weldability poor (20/100); formability excellent (90/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the solder & low-melting alloy family
Yield strength against density for every solder & low-melting alloy grade FabDigit runs. Pb58Sn40Sb2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Pb58Sn40Sb2
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.
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.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Sntin | 39.5 – 40.5 | 40 |
| Sbantimony strengthener | 1.5 – 2.5 | 2 |
| 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 lead | balance |
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.
Equivalent designations
Standards and trade names that resolve to Solder & Low-Melting Alloy Pb58Sn40Sb2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ISO
- 9453-134
How much does Pb58Sn40Sb2 cost?
Pb58Sn40Sb2 is a high-cost solder & low-melting alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Pb58Sn40Sb2 — frequently asked
What is Pb58Sn40Sb2 used for?
Pb58Sn40Sb2 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?
Pb58Sn40Sb2 has a typical yield strength of 32 MPa (4.64 ksi) and a tensile strength of 48 MPa (6.96 ksi) — stronger than 73% of solder & low-melting alloy grades.
Is Pb58Sn40Sb2 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 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?
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 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?
Pb58Sn40Sb2 is rated for continuous use to about 110°C (230 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does Pb58Sn40Sb2 cost?
Pb58Sn40Sb2 is a high-cost solder & low-melting alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN ISO 9453 — Soft solder alloys: chemical composition and forms (alloy 134, S-Pb58Sn40Sb2) — ISO/CEN (2020)
- ASTM B32 — Standard Specification for Solder Metal — ASTM International (2020)
- GB/T 3131 (2020)
- ASM Handbook Vol. 3 — Alloy Phase Diagrams / Solder alloy property tables — ASM International (1992)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (soldering section) — ASM International (1993)
- 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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.