Use of a glass composition to make a tubular glass body that is adapted to form a glass-metal joint in a tubular solar collector. The composition is a borosilicate glass having a dilatometric chart with a hard segment and a soft segment hysteresis where the soft segment glass transition temperature is less than the hard segment glass transition temperature for a temperature difference ΔT higher than 20° C. comprising 5% to 8% Na2O, 0.1% to 3% K2O, 0.1% to 1.5% CaO, 5% to 7.5% Al2O3, 70% to 75% SiO2, and 11.6% to 13.7% B2O3.