The brand Hyperal by Legor Group identifies our brazing alloys with the highest standards of quality and performance. HYP729 alloy, the subject of this study, it is the best example to date.
HYP729 is an internationally patented alloy, for joining hard metal components and sintered elements with base elements such as iron and steel. The product is especially suitable for the cutting tools sector, as an alternative to the more common alloy EN1044 AG502 (Ag 49%), used mainly in the diamond tools sector.
HYP729 is an innovative material thanks to its limited content of Silver (Ag 29%), in comparison to traditional brazing alloys used in the industrial sector of reference – yet it maintains excellent performance standards. This also allows to achieve a significant cost reduction and at the same time to be less affected by the fluctuations of the metal.
HYP729 contains a series of alloying elements that regulate and modify its behaviour at temperature, thus ensuring the best conditions of wettability, capillarity and adhesion during the melting of the material. The presence of chemical reinforcing elements, such as nickel, outbalances the limited content of silver, allowing to reach the desired mechanical performance both in the case of traction and shear stress.
The production process developed by Legor Group for Hyperal alloys ensures their maximum microstructural homogeneity. Furthermore, the careful selection of raw materials together with the several monitoring tests and laboratory analyses ensures a high level of purity and consistency, for greater user-friendliness and operator safety (absence of toxic elements such as lead and cadmium) and guaranteed results.
Thanks to the wide melting range (650 °C - 760 °C), HYP729 is especially versatile, and can be used for brazing of hard and soft syntered bonds, ensuring excellent strength and joint filling.
We recommend to use the product with flux FLUX104SF, in order to guarantee excellent mechanical performance and the following characteristics: