MinnTech Electronics

99.3% tin and 0.7% copper

M.G. Chemicals no clean Lead-Free Solder was designed with Sn/Cu (Tin/Copper) alloys as a lead-free alternative for the standard Tin and Lead solder. These alloys conform to the impurity requirements of J-Std-006 and RoHS. Use this solder anywhere you would use normal solder.

• Specifications
• Test Method Specification
• Cu content 0.3-0.7 %
• Sn content Balance
• Flux Classification JSTD-004 REL0
• Copper Mirror IPC-TM-650 2.3.32 No removal of copper film
• Silver Chromate IPC-TM-650 2.3.33 Pass
• Corrosion IPC-TM-650 2.6.15 Pass
• SIR JSTD-004,Pattern Down IPC-TM-650 2.6.3.3 2.33 x 10 11 ohms
• SIR Bellcore (Telecordia) Bellcore GR-78-CORE 13.1.3 6.12 x 10 11 ohms
• Electromigration Bellcore GR-78-CORE 13.1.4 Pass
• Post Reflow Flux Residue TGA Analysis 55%
• Acid Value IPC-TM-650 2.3.13 190-210
• Flux Residue Dryness IPC-TM-650 2.4.47 Pass
• Spitting of Flux-Cored Solder IPC-TM-650 2.4.48 0.3%
• Solder Spread IPC-TM-650 2.4.46 130 mm2
• Lead free/leaded solder comparison Lead Free Solder (Sn/Cu) Sn63/Pb37 (Leaded Solder)
• Melting Point 227º C (441º F) 183 º C (361.4 º F)
• Wire Diameter 0.032” (0.81 mm) 0.032” (0.81 mm)
• Std. Wire Gauge 21 21
• Tolerance, in. +/- 0.002” +/- 0.002”
• Hardness, Brinell 9HB 14HB
• Coefficient of Thermal Expansion Pure Sn=23.5 24.7
• Tensile Strength 3190 psi 4442 psi
• Density 7.31 g/cc 8.42 g/cc
• Electrical Resistivity 10 - 15 µohm-cm 14.5 µohm-cm
• Electrical Conductivity 13 %IACS 11.9 %IACS
• Yield Strength, psi 2180 3950
• Total Elongation,% 39 48
• Joint Shear Strength, at 0.1mm/min 20ºC 23 14
• Creep Strength, N/mm2 at 0.1mm/min 20ºC 8.6 3.3
• Creep Strength, N/mm2 at 0.1mm/min 100 C 2.1 1

Flux Percentage
M.G. Chemicals Lead Free Solder utilizes a state-of-the-art automatic wire extrusion and wire drawing machines to manufacture consistent solder. The introduction of flux core in the wire extrusion process involves constant monitoring of flux percentage to ensure minimal flux voids and irregular wire. Typical flux percentage for our Lead Free Solder is 2.0-4.0%.
Flux Core
A unique flux system was specifically used for high temperature lead free alloys. It provides the fluxing activity levels that promote fast wetting action and maximum wetting spread. Utilizing synthetically refined resin and very effective activator that wets and spreads like an RA type. This special activator exhibits virtually no spattering. Activator conforms to J-STD-004, REL0. Cleaning Flux core is a no clean formulation therefore the residues do not need to be removed for typical applications.