Going off of the previous question about borosilicate glass for 3D printers,  Is Borosilicate

3D Printing
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Going off of the previous question about borosilicate glass for 3D printers,
Is Borosilicate glass overkill for this application and can normal tempered glass be used instead? I have a decently powerful bed heater (325W) and I don’t want to replace it frequently (if ever)
Thanks in advance

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I’ve been using 1/4 tempered for about 6 months now. I recently started having it peel on prints. Anything I print with a large contact area near the center is getting glass peeling with it.

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I’ve never had to replace any of the 3mm glass I’ve been using for years, even when I have one half of my heated bed cold and the other going at 120C. That being said, 325W is a lot, even for bigger heated beds (by the way, is that a silicone heater? Those need some aluminum to spread the heat), and the glass I’ve been using has only ever been sitting on regular 150W Prusa heaters.

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The one I’m using is a silicone heater. I’m not using s heat spreader though. That might be part of my issue.

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Thanks for the input–I’ll probably go with some 3/16" tempered glass for the build surface; @Thomas_Sanladerer , I have a 1.5mm aluminum sheet on top of the silicone heater for purposes of spreading the heat

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For clarification, I too use a silicone heater with a 360w power supply. I actually mounted my heater on top of the old aluminum bed, to fit the larger size heater and not have it hit the leveling screws. My glass plates that cracked were mounted directly to the top of the heater. I did notch out the aluminum to get the heater to sit flat BTW.

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I have been using tempered glass since 4 months , no problem yet

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I couldn’t get tempered glass, the standard prusa/Mendel bed is too small for the tempering furnaces in this area. They complained it fell through the gaps in the conveyer belt.