Tin Alloys and Soft Soldering Materials

Flux-cored wires represent one of the most versatile formats in soft soldering, especially in electronics. Their main feature is the presence of an internal flux core that, when activated by heating, removes metal oxides and facilitates alloy wetting, simplifying the operator's work and ensuring consistent results. Composed of an outer sheath of solder alloy enclosing one or more flux channels (2-3% by weight), they are available in diameters from 0.3 mm for precision work on SMD to 2 mm for wiring. We offer lead-free formulations (SAC305, SnCu) RoHS compliant and traditional SnPb versions for specific applications. The flux can be no-clean, water-soluble or rosin-based, classified according to IPC J-STD-004. Ideal for manual and automated soldering of printed circuits, repair, prototyping and mass production in electronics, automotive and telecommunications.

Solid wires consist exclusively of solder alloy, without internal flux, particularly suitable for processes where flux is applied separately or where maximum control over process chemistry is required. They offer one less variable from a chemical point of view, allowing selection of the most suitable flux for material, geometry and surface conditions. Available in diameters from 0.3 to 2.0 mm, they guarantee maximum metallic purity and absence of flux fumes during melting. The 100% alloy composition makes them ideal for robotic soldering, soft brazing, component tinning and all processes requiring complete traceability of chemical composition. We offer lead-free formulations (SAC305, SAC387, SnCu0.7) RoHS compliant and traditional SnPb alloys for special applications. Each batch includes analysis certificate and complete traceability.

Bars and sticks are the reference format for feeding wave soldering baths and dip tinning processes. Made from high-purity metals (≥99.9%) and subjected to treatments that reduce oxidation, they improve bath stability and contain dross formation. Large format ingots are used for initial tank filling, while sticks allow progressive replenishment during production, reducing thermal shocks and maintaining stable alloy composition. Available in customized formats for automatic loading. Bath management is fundamental: contamination from copper, iron or aluminum must be kept within defined limits. We offer both lead-free alloys (SAC305, SnCu0.7, SnAg) RoHS certified and traditional SnPb compositions. Each batch includes analysis certificate with complete traceability and impurity control according to ISO 9001:2015 standards.

Soldering sticks are the ideal format for manual soldering with torch or high-power soldering iron, where precise control of filler material is required. Made with high purity (≥99.9%), they guarantee uniform melting and excellent flow for applications requiring aesthetic finish or dimensional precision. Particularly appreciated for electronic component repair, prototype assembly, craft work and applications where flux-cored or solid wires are unsuitable. The format allows controlled alloy feeding and adapts to various soldering techniques: flame, high-power pencil soldering iron or arc soldering. Available in lead-free alloys (SAC, SnCu, SnAg) RoHS compliant and traditional SnPb compositions for specific applications. Offered in various lengths and sections to suit every processing need. Ideal for laboratories, service centers, prototyping and artistic production.

Solder paste for SMT technology is a homogeneous suspension of metallic particles (alloy powder) in an organic vehicle containing flux and rheological additives. Its function is twofold: to allow precise deposition through stencil and to guarantee, in reflow, the formation of wetted and uniform joints. The formulation balances viscosity, thixotropy, stencil life and flux activity. The most common alloys are SAC (SAC305) and lower silver variants (SAC0307) to reduce costs. For low temperature applications, bismuth-based alloys (42Sn57Bi1Ag) are used. Powders are classified by particle size (Type 3: 20-45 µm; Type 4: up to ~20 µm) based on component pitch. During printing, the paste must maintain stability (no slump), good release and defined profiles. In reflow, the flux activates at low temperature, the alloy melts and surface tension forms the joints. Available no-clean, water-soluble and rosin-based formulations certified IPC J-STD-004 and J-STD-005.

Flux is the chemical element that makes tin wetting possible by eliminating surface oxides and temporarily protecting the clean metal during soldering. There is no universal formulation: the choice depends on substrate, process and post-soldering cleaning requirements. In electronics, no-clean fluxes (ROL0/ROL1 classes) with transparent and non-corrosive residue prevail, ideal where cleaning is not planned. RMA/RA rosin-based fluxes guarantee greater activity and wide process window, useful on less clean PCBs or through-hole components. For mechanical soft brazing, high activity acid fluxes (water-based) are used, effective on copper, brass and galvanized sheets, but requiring careful washing. We supply fluxes in liquid version for wave soldering (spray or foam), in gel/syringe for manual rework, and in paste for mechanical applications. VOC-free solutions available compliant with environmental regulations. All classified according to IPC J-STD-004.

STARLOCK® fastening systems represent an innovative and reliable solution for fastening mechanical components on pins. Based on a unique operating principle, they guarantee exceptional hold with simplicity of assembly and controlled removal. The system uses self-locking elastic washers that deform during assembly, creating a permanent mechanical locking effect. Assembly requires only simple pressure, eliminating the need for special tools. Removal is only possible by destroying the component, guaranteeing safety against accidental tampering. Available in burnished steel, stainless steel and galvanized, with caps in various materials. Ideal for automotive, home appliances, industrial machinery and applications requiring vibration resistance. Each component is produced according to rigorous quality standards with controls on every batch.