E‑Qual SMQ 60/40 Solder
E-Qual Solder Alloys – High Performance and Reliability
Composition and Impurity Limits – E‑Qual SMQ 60/40 solder
The table shows typical composition for E‑Qual SMQ 60/40 solder and ISO 9453 limits for Alloys 104 and 103, plus recommended in‑use maxima for bath control.
| Element | E‑Qual SMQ % (Typical) | ISO 9453 Alloy 104 | ISO 9453 Alloy 103 | Max Recommended In Use |
|---|---|---|---|---|
| Tin (Sn) | 60.0 | 59.5 – 60.5 | 59.5 – 60.5 | N/A |
| Antimony (Sb) | 0.02 | 0.05 max | 0.20 max | 0.20 max |
| Copper (Cu) | 0.0005 | 0.05 max | 0.05 max | 0.25 combined** |
| Zinc (Zn) | 0.0002 | 0.001 max | 0.001 max | 0.002 max |
| Iron (Fe) | 0.001 | 0.02 max | 0.02 max | 0.01 max |
| Arsenic (As) | 0.002 | 0.03 max | 0.03 max | 0.01 max |
| Nickel (Ni) | 0.001 | Not specified*** | Not specified*** | 0.01 max |
| Bismuth (Bi) | 0.01 | 0.05 max | 0.10 max | 0.01 max |
| Cadmium (Cd) | 0.0002 | 0.002 max | 0.002 max | 0.002 max |
| Silver (Ag) | 0.001 | Not specified*** | Not specified*** | Not specified*** |
| Gold (Au) | 0.001 | Not specified*** | Not specified*** | 0.25 combined** |
| Aluminium (Al) | 0.0001 | 0.001 max | 0.001 max | 0.002 max |
* Sum of all impurities except Sb, Bi and Cu: 0.08% max for Alloy 104 and Alloy 103.
** Combined total for Cu + Au in bath control as indicated.
*** Not specified in ISO 9453 for these alloys.
Key Advantages
- Consistent, clean, well-formed joints
- High yields with low production costs
- Reduces icicling and bridging
- Produces low fillets for precision
- Minimises product usage and machine maintenance
- Meets or exceeds all internationally recognised standards
- Delivers optimum performance and batch consistency
Quality Control and Analysis
All E-Qual solder alloys come from a certified Quality Management System. Since 1991, DKL Metals has maintained third-party accreditation for its Quality Management System, regularly updated to meet evolving standards.
Every stage of manufacture undergoes strict quality control. Bars include markings for grade and unique batch numbers for traceability. We offer a free solder analysis to check bath contamination levels and provide expert advice for optimal solder quality.
Economy and Anti-Dross Treatment
E-Qual solders offer competitive pricing, but also reduce dross formation compared to untreated solders. This lowers material loss and maintenance costs. We provide complimentary dross containers with re-sealable lids to assist with safe dross handling.
Wide Range of Products
Choose from various E-Qual solder wire types, including cored and solid wires. Options include resin cored, low-solids, halide-free synthetic and water washable wires in numerous diameters for diverse applications.
We also supply a full range of fluxes, cleaners, thinners, and additives. Our experts are ready to discuss your requirements and provide relevant data sheets.
Product Forms and Packaging
| Style | Nominal Weight | Dimensions/Diameters | Standard Packing |
|---|---|---|---|
| Autofeed Ingot | 5 kg | 500 x 45 x 33 mm | 5 kg |
| Autofeed Ingot | 2 kg | 330 x 45 x 15 mm | 24 kg Carton |
| Bar | 1 kg | 300 x 32 x 12 mm | 25 kg Carton |
| Bar | 500 g | 505 x 22 x 6 mm | 25 kg Carton |
| Chunks | – | – | 15 kg Carton |
| 500g Reel | 500 g | 3.5mm – 0.5mm | 10 kg Carton |
| 3kg Reel | 3 kg | 3.5mm – 0.7mm | 12 kg Carton |
Learn More!
Gov.uk – RoHS compliance and guidance
DKL – Industries that still rely on Leaded Solder