HF32 no-clean flux-cored solder wire

Technical specifications

Specifications are taken from the manufacturer’s technical documentation. Updated 11/13/2026.

Description

This electronics solder wire has a flux core based on a No-Clean flux and is supplied with either lead-free or lead-containing alloys. It was developed for demanding requirements in conventional soldering and SMD soldering in industrial manufacturing, and it is equally suitable for repair and re-soldering. Because the flux is a no-clean formulation, the wire suits production and rework environments where post-solder cleaning is not intended as a standard step.

The core flux, also designated HF32, is a halogen-free activated flux based on natural and modified resins. It combines high activity and good flow properties with minimal residues. These residues are bright, usually hardly visible, solid and electrically safe. The formulation therefore pairs reliable wetting during soldering with a clean appearance of the finished joint and residues that do not compromise the electrical safety of the assembly.

Several design features define the flux chemistry. Activation is halogen-free, and the resin content is reduced compared with conventional resin-based formulations. The flux contains a high proportion of organic acids, which provide its activity. Fume generation during soldering is lower, which benefits the working conditions at the soldering station.

The HF32 wire can be used for both manual and machine soldering in electrical engineering and electronics. This makes it suitable for hand soldering of through-hole and SMD components and for automated soldering processes that use flux-cored wire feeding. Its availability in lead-free and lead-containing alloy versions allows it to be matched to the alloy requirements of the specific application, whether in new production or in servicing and reworking existing assemblies.

Although the residues are designed to remain on the assembly, a matching cleaner, Flux-Ex Post, is available for cases where flux residues are to be removed after soldering. A technical datasheet and safety data sheets are provided for the product, giving detailed information on the available alloy versions and on safe handling.