Abstract: A metal composition suitable for originating a joint by means of welding with a borosilicate glass for a solar collector. The composition, expressed in weight percentage, comprises the following alloy elements: Ni Co Mn Si C Ti Zr Ta Ti + Zr + Ta 28-31 15-18 ?0.5 ?0.3 ?0.05 ?0.30 ?0.30 ?0.30 ?0.40 and it is such that 45.5?(Ni+Co)?46.5, and that (Ti+Ta+Zr)?4×C, the remaining part being made up of iron, apart from the inevitable impurities. Additionally, a metal ring made of the metal composition described above and suitable for originating a metal-glass joint by means of welding; the metal-glass joint thus obtained; and the tubular solar collector thus obtained.

Abstract: The present invention regards a metal composition suitable for originating a joint (22) by means of welding with a borosilicate glass for a solar collector (10). The composition, expressed in weight percentage, comprises the following alloy elements Table 1 and it is such that 45.5?(Ni+Co)?46.5, and that (Ti+Ta+Zr)?4×C, the remaining part being made up of iron, apart from the inevitable impurities. The invention also regards: a metal ring (20) made of the metal composition described above and suitable for originating a metal-glass joint by means of welding; the metal-glass joint thus obtained; and the tubular solar collector (10) thus obtained.