We may resume this blog. To start writing more about new materials joining technology. Not all materials are new but often new properties in less widely known materials are found when looking for different kinds of things. It is often worth reconsidering them in new contexts. That may be worth an essay. Examples may be "new" HEA filler metals, like the less well known Co_3 Ni_1 Si_1 Mo_1 Cr_1.3, Co_3 Ni_1 Si_1 Nb_1 Cr_1.3, and others with that pattern and near that pattern, where the coefficients are atomic ratios and the rest being impurities or additives, and the material Ti_4 Zr_1 Nb_1 Cu_1.5 Ni_1.5, which is more widely known but not as a HEA material. HEA filler metals for low temperature joining is a relatively new context. These are also examples where a complex system of more components gives a much more homogeneous result after everything interacts, and that is also something else worth discussing.