Alkali-free glass

An alkali-free glass having a strain point of 700° C. or higher and 740° C. or lower, a density of 2.6 g/cm3 or lower, a Young's modulus of 90 GPa or higher and 100 GPa or lower, an average coefficient of thermal expansion at 50° C. to 350° C. of 30×10−7/K or higher and 39×10−7/K or lower, a temperature T2 at which a glass viscosity reaches 102 dPa·s of 1590° C. or higher and 1690° C. or lower, a temperature T4 at which the glass viscosity reaches 104 dPa·s of 1350° C. or lower, a glass surface devitrification temperature (Tc) of lower than (T4+80)° C., and a specific elastic modulus of 36 MN·m/kg or higher, the alkali-free glass comprising:

• as represented by mol % based on oxides,
• SiO2:
• 55% or higher and 80% or lower;
• Al2O3:
• 12% or higher and 20% or lower;
• B2O3:
• 0.3% or higher and 5% or lower;
• MgO:
• 5% or higher and 18% or lower;
• CaO:
• 0.1% or higher and 12% or lower;
• SrO:
• 0.1% or higher and 8% or lower;
• and
• BaO:
• 0% or higher and 6% or lower;
• wherein
• MgO+CaO+SrO+BaO is 20% or lower,
• MgO/CaO is 1 or higher,
• MgO/(MgO+CaO+SrO+BaO) is 0.5 or higher,
• MgO+Al2O3 is 24% or higher and 38% or lower, and
• when Formula (I) is (−3.125×[SiO2]−2.394×[Al2O3]−3.511×[B2O3]−2.167×[MgO]−2.608×[CaO]−3.161×[SrO]−3.583×[BaO]+3.795×102), a value of Formula (T) is 90 or higher and 100 or lower.