{"id":200,"date":"2026-09-02T15:15:21","date_gmt":"2026-09-02T15:15:21","guid":{"rendered":"https:\/\/glassubstrate.net\/?post_type=rg_material&p=200"},"modified":"2026-09-28T09:40:48","modified_gmt":"2026-09-28T09:40:48","slug":"heat-resistant-borosilicate-glass","status":"publish","type":"rg_material","link":"https:\/\/glassubstrate.net\/en\/material\/heat-resistant-borosilicate-glass\/","title":{"rendered":"SCHOTT SUPREMAX\u00ae 33 Thick Borosilicate Glass"},"content":{"rendered":"
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SCHOTT SUPREMAX\u00ae 33<\/div>\n

SCHOTT SUPREMAX\u00ae 33 Thick Borosilicate Glass<\/h1>\n

28.6\u201357.2 mm rolled type 3.3 borosilicate glass plate<\/h2>\n

With the same chemical composition as BOROFLOAT\u00ae 33 and combining low thermal expansion, high thermal stability, good light transmission and chemical durability, it suits large-thickness industrial viewing windows and precision structural parts.<\/p>\n

Request a Material Quote<\/a>SCHOTT official data sheet PDF \u2193<\/a><\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/section>\n
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Material Positioning<\/div>\n

Genuine 3.3 borosilicate plate for large thickness, high temperature and precision processing<\/h2>\n

SUPREMAX\u00ae 33 uses a rolled process to deliver the large thicknesses that micro-float cannot cover, while retaining the thermal, optical and chemical properties of type 3.3 borosilicate glass.<\/p>\n<\/div>\n

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01<\/span>Low thermal expansion<\/strong><\/p>\n

Average coefficient of linear thermal expansion from 20\u2013300 \u00b0C is 3.25 \u00d7 10\u207b\u2076\/K.<\/p>\n<\/article>\n

02<\/span>Ultra-thick plate range<\/strong><\/p>\n

Official standard thicknesses span 28.60\u201357.20 mm, suited to thick-walled structural parts.<\/p>\n<\/article>\n

03<\/span>Thermal and chemical stability<\/strong><\/p>\n

Short-term temperature resistance up to 500 \u00b0C and long-term 450 \u00b0C, with HGB 1 \/ HGA 1 water resistance class.<\/p>\n<\/article>\n<\/div>\n<\/div>\n<\/section>\n

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Material Introduction<\/div>\n

From SCHOTT rolled plate to installable industrial glass components<\/h2>\n<\/div>\n
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SUPREMAX\u00ae 33 is a rolled borosilicate glass supplied in plate form. Its chemical composition matches SCHOTT BOROFLOAT\u00ae 33 and it meets the type 3.3 borosilicate glass described in ISO 3585. The official documentation highlights its low density, low thermal expansion, high thermal resistance, good light transmission and chemical durability.<\/p>\n

Plate projects should check sheet thickness tolerances, effective viewing opening, support, sealing, temperature difference, pressure, hole and slot positions and edge condition together. Material parameters cannot replace complete appliance structure, safety factors or application validation.<\/p>\n

\"SUPREMAX<\/div>\n<\/div>\n