Quick Answer: What Temperature Does Glass Break in the Oven

When you put glass in a pre-heated oven it should not even start to melt or become soft until over 900 degrees Fahrenheit. It is the extreme thermal variations such as sudden and uneven temperature changes that could cause the glass to break.

Can glass go in the oven at 350?

In general terms, stoneware, tempered glass (such as pyrex or corningware), metal, enamelware, and ceramic should be oven-safe up to at least 350 F. Handblown glass should not go in the oven.

Can you put glass in the oven at 450?

The European made bakeware stayed intact at 450 degrees, but five out of six pieces shattered when the temperature was increased to 500 degrees. But, it also said the bakeware is oven and freezer safe. Pyrex and Anchor Hocking insist their glassware is safe when used according to directions.