The 557S is a universal soldering alloy for yellow gold, suitable for all karat values, designed to ensure versatility and reliable performance in joining processes.

It stands out for its good balance between melting and flowing temperatures, allowing for effective control of the soldering process and good integration with various gold karat values.

Operating temperatures:
18kt: melting 740°C – flowing 790°C
14kt: melting 680°C – flowing 710°C
9kt: melting 670°C – flowing 710°C

From an operational standpoint, the alloy offers good wetting and uniform material distribution, allowing for obtaining clean, resistant, and aesthetically well-integrated joints.

The 557S is particularly indicated for goldsmithing operations that require a versatile soldering alloy, usable on multiple karat values, simplifying the management of the production process without compromising quality.

It therefore represents a practical and efficient solution for jewelry laboratories and productions, where reliability, flexibility, and consistent results are required.