Solder & Low-Melting Alloy Sn95Ag5
ISO 704
Sn95Ag5 is a binary tin-silver solder with 5% silver, a lead-free filler that freezes over a 221–240 °C range and gives higher strength and creep resistance than plain tin solders.
Reference datasheet — Sn95Ag5 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.
Values for the AS-CAST condition
Sn95Ag5 tempers and conditions
Sn95Ag5 is supplied in one standard condition, AS-CAST. AS-CAST is the default FabDigit quotes; the values on this page are for it.
Supply forms, finishes and certifications
Ways Sn95Ag5 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
FC-WIRE | Flux-Cored Wire | Supply form |
PREFORM | Stamped washers, discs, rings and pellets | Supply form |
WIRE | Solid Wire | Supply form |
PASTE | Solder Paste | Printing process |
REFLOWED | As-Reflowed Joint | Surface finish |
What is Sn95Ag5?
Sn95Ag5 is a binary tin-silver solder with 5% silver, a lead-free filler that freezes over a 221–240 °C range and gives higher strength and creep resistance than plain tin solders. Engineers select it where joint fatigue life matters more than cost; it is supplied as as-cast bar, solid and flux-cored wire, paste, preforms and reflowed joints. Properties are 32 MPa yield, 52 MPa tensile, 30% elongation and 17 HB with service to about 125 °C, and the wide pasty range demands controlled cooling. Where a narrower melting range and lower silver cost are needed, use a SAC alloy such as SAC305. Sn95Ag5 has a density of 7.4 g/cm³ (0.267 lb/in³), lighter than 67% of solder & low-melting alloy grades. It melts at 221°C (430 °F). Sn95Ag5 has a yield strength of 32 MPa (4.64 ksi) and a tensile strength of 52 MPa (7.54 ksi) — stronger than 73% of solder & low-melting alloy grades. Elongation at break is 30% and the elastic modulus is 50 GPa (7.25 Msi).
What is Sn95Ag5 used for?
- Electrical connections
- High-reliability joints
- Aerospace wiring
- Instrumentation soldering
Advantages
- High electrical conductivity — 14 % IACS, better than 94% of solder & low-melting alloy grades
- Conducts heat well — 60 W/m·K (34.7 BTU/hr·ft·°F), better than 89% of solder & low-melting alloy grades
- Stiff — 50 GPa (7.25 Msi), better than 86% of solder & low-melting alloy grades
- High service temperature — 125°C (257 °F), better than 80% of solder & low-melting alloy grades
Limitations
- Difficult to machine — 20/100, worse than 94% of solder & low-melting alloy grades
- High embodied carbon — 22 kg CO₂/kg, worse than 92% of solder & low-melting alloy grades
Sn95Ag5 properties
Typical room-temperature values for Sn95Ag5-AS-CAST; bars are the position among solder & low-melting alloy grades.
Physical3
Sn95Ag5 has a density of 7.4 g/cm³ (0.267 lb/in³), lighter than 67% of solder & low-melting alloy grades. It melts at 221°C (430 °F).
Mechanical11
Sn95Ag5 has a yield strength of 32 MPa (4.64 ksi) and a tensile strength of 52 MPa (7.54 ksi) — stronger than 73% of solder & low-melting alloy grades. Elongation at break is 30% and the elastic modulus is 50 GPa (7.25 Msi).
Thermal6
Sn95Ag5 is rated for continuous service to 125°C (257 °F). It conducts heat at 60 W/m·K (34.7 BTU/hr·ft·°F), better than 89% of solder & low-melting alloy grades. Thermal expansion is 22.5 µm/m·K (12.5 µin/in·°F).
Electrical3
Sn95Ag5 conducts electricity at 14 % IACS, better than 94% 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 Sn95Ag5 takes about 330 MJ of energy and emits 22 kg of CO₂ — more than 86% of solder & low-melting alloy grades. Typical recycled content is 25%.
Manufacturability7
Sn95Ag5's machinability is poor (20/100, worse than 94% of solder & low-melting alloy grades); weldability poor (25/100); 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. Sn95Ag5 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Sn95Ag5
Is Sn95Ag5 easy to machine?
Rarely machined — extremely gummy and smears; if trimming preforms use sharp, high-rake tools, generous coolant and shear-cutting/stamping instead of turning.
Can Sn95Ag5 be welded?
Not arc-welded; joined by remelting — dip, wave, iron, reflow, laser or vapour-phase soldering with mildly activated rosin or no-clean flux, peak temperature 255–275 °C.
Can Sn95Ag5 be formed, bent or molded?
Extrudes and draws to wire/foil at room temperature with no intermediate anneal (recrystallises at RT); wide 221–240 °C freezing range needs controlled cooling in casting to limit pasty shrinkage and bridging.
Sn95Ag5 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 |
|---|---|---|
| Agsilver, forms Ag₃Sn strengthening phase | 4.5 – 5.5 | 5 |
| Pbimpurity max (RoHS lead-free typically ≤0.07 %) | ≤ 0.1 | |
| Sbimpurity max | ≤ 0.1 | |
| Cuimpurity max | ≤ 0.08 | |
| Biimpurity max | ≤ 0.1 | |
| Feimpurity max | ≤ 0.02 | |
| Znimpurity max | ≤ 0.01 | |
| Alimpurity max | ≤ 0.01 | |
| Asimpurity max | ≤ 0.03 | |
| Cdimpurity max | ≤ 0 | |
| Sn | balance |
What surface finishes work on Sn95Ag5?
Joints are left as-soldered; clean halide flux residues to avoid corrosion, expect grey tarnish over time, and avoid plating over the solder — protect with conformal coating instead.
Equivalent designations
Standards and trade names that resolve to Solder & Low-Melting Alloy Sn95Ag5 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ISO
- 704
How much does Sn95Ag5 cost?
Sn95Ag5 is a high-cost solder & low-melting alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sn95Ag5 — frequently asked
What is Sn95Ag5 used for?
Sn95Ag5 is typically used for electrical connections, high-reliability joints, aerospace wiring and instrumentation soldering. In short: fatigue-oriented Sn-Ag solder; higher creep resistance than Sn-Pb; lead-free, copper-free binary.
What is the yield strength of Sn95Ag5?
Sn95Ag5 has a typical yield strength of 32 MPa (4.64 ksi) and a tensile strength of 52 MPa (7.54 ksi) — stronger than 73% of solder & low-melting alloy grades.
Is Sn95Ag5 easy to machine?
Not especially — machinability is rated poor (20/100, worse than 94% of solder & low-melting alloy grades). Rarely machined — extremely gummy and smears; if trimming preforms use sharp, high-rake tools, generous coolant and shear-cutting/stamping instead of turning.
Can Sn95Ag5 be welded?
Not readily — weldability is rated poor (25/100). Not arc-welded; joined by remelting — dip, wave, iron, reflow, laser or vapour-phase soldering with mildly activated rosin or no-clean flux, peak temperature 255–275 °C.
What surface finishes work on Sn95Ag5?
Joints are left as-soldered; clean halide flux residues to avoid corrosion, expect grey tarnish over time, and avoid plating over the solder — protect with conformal coating instead.
Can Sn95Ag5 be formed, bent or molded?
Extrudes and draws to wire/foil at room temperature with no intermediate anneal (recrystallises at RT); wide 221–240 °C freezing range needs controlled cooling in casting to limit pasty shrinkage and bridging.
What is the maximum service temperature of Sn95Ag5?
Sn95Ag5 is rated for continuous use to about 125°C (257 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does Sn95Ag5 cost?
Sn95Ag5 is a high-cost solder & low-melting alloy ($$$$), 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
- ASTM B32 — Standard Specification for Solder Metal — ASTM International (2020)
- GB/T 20422 — (Lead-free solder) — SAC / (2018)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (Soldering section) — ASM International (1993)
- ASM Handbook Vol.3 — Alloy Phase Diagrams (Ag-Sn system) — ASM International (2016)
- NIST Database for Solder Properties with Emphasis on New Lead-free Solders — NIST / Colorado School of Mines (2002)
- Sn/Ag solder alloy technical data (wire, bar, paste, preforms) — Indium Corporation (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.