Gorilla Glass · finish state · default condition
Gorilla Glass Chem Strengthened
Properties of the Chem Strengthened condition, compared with the other Gorilla Glass tempers.
Standard supplied condition for cover-glass applications: surface compressive stress ~700–900 MPa with 30–60 µm depth of layer; pick this unless you must post-process the glass.
What is Gorilla Glass Chem Strengthened?
Gorilla Glass Chem Strengthened is Gorilla Glass supplied in the Chem Strengthened condition — standard supplied condition for cover-glass applications: surface compressive stress ~700–900 MPa with 30–60 µm depth of layer; pick this unless you must post-process the glass. Gorilla Glass Chem Strengthened has a tensile strength of 350 MPa (50.8 ksi), stronger than 90% of glass grades. Elongation at break is 0% and the elastic modulus is 72 GPa (10.4 Msi). Gorilla Glass Chem Strengthened has a density of 2.42 g/cm³ (0.0874 lb/in³), lighter than 78% of glass grades.
Advantages
- Lightweight — 2.42 g/cm³ (0.0874 lb/in³), better than 78% of glass grades
Limitations
- Difficult to machine — 3/100, worse than 97% of glass grades
- Limited service temperature — 200°C (392 °F), worse than 89% of glass grades
- Poor heat conductor — 1 W/m·K (0.578 BTU/hr·ft·°F), worse than 79% of glass grades
Gorilla Glass Chem Strengthened properties
Typical room-temperature values for Gorilla Glass Chem Strengthened — 7 properties are specific to this condition; the rest are grade-level values shared by every Gorilla Glass temper. Each bar shows where the value sits among the glass grades in FabDigit's library — further right is higher.
Physical4
Gorilla Glass Chem Strengthened has a density of 2.42 g/cm³ (0.0874 lb/in³), lighter than 78% of glass grades.
Mechanical12
Gorilla Glass Chem Strengthened has a tensile strength of 350 MPa (50.8 ksi), stronger than 90% of glass grades. Elongation at break is 0% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal5
Gorilla Glass Chem Strengthened is rated for continuous service to 200°C (392 °F). It conducts heat at 1 W/m·K (0.578 BTU/hr·ft·°F), worse than 79% of glass grades. Thermal expansion is 7.9 µm/m·K (4.39 µin/in·°F).
Electrical5
Gorilla Glass Chem Strengthened is an electrical insulator with a dielectric strength of 15 kV/mm (381 V/mil) and a resistivity of 1×10¹² Ω·m.
Chemical & Environmental2
Corrosion resistance is excellent (90/100), better than 71% of glass grades.
Sustainability4
Producing a kilogram of Gorilla Glass Chem Strengthened takes about 35 MJ of energy and emits 2.6 kg of CO₂ — less than 74% of glass grades. Typical recycled content is 3%.
Manufacturability2
Gorilla Glass Chem Strengthened's machinability is not recommended (3/100, worse than 97% of glass grades).
Common Calculations4
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other Gorilla Glass tempers and conditions
Gorilla Glass is also supplied in 4 other conditions. The full side-by-side table is on the Gorilla Glass overview.
- Chem StrengthenedDefaultStandard supplied condition for cover-glass applications: surface compressive stress ~700–900 MPa with 30–60 µm depth of layer; pick this unless you must post-process the glass.350 MPa tensile
- GG3Lower-modulus NDR composition tuned for scratch/flaw tolerance; common on mid-range and industrial touch panels.595 HV
Working with Gorilla Glass Chem Strengthened
Is Gorilla Glass easy to machine?
Cut, drill and edge-finish only in the un-strengthened state using diamond scribe/CNC grinding or laser (filamentation) cutting; never machine after ion exchange or the compressive layer releases and the part shatters.
Can Gorilla Glass be welded?
Not weldable; join by optically clear adhesive (OCA), silicone gasketing or glass-frit/laser sealing to another glass in the annealed state.
Can Gorilla Glass be formed, bent or molded?
Flat sheet is fusion-drawn to final thickness (0.4–2 mm); 2.5D/3D shapes are hot-formed on graphite tooling near the softening point (~850–900 °C) and then ion-exchanged in molten KNO₃ at 380–460 °C.
What surface finishes work on Gorilla Glass?
Standard finishes are optical polish, HF-etched anti-glare, AR/AF (fluorosilane) coatings and screen-printed ceramic/organic borders; avoid strong alkaline cleaners and any HF-bearing chemistry.
Gorilla Glass chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Al2O3high alumina enables fast K⁺/Na⁺ ion exchange | 10 – 17 | 14 |
| Na2Oexchangeable alkali | 10 – 16 | 14 |
| MgO | 0 – 6 | 3 |
| K2O | 0 – 3 | 0.6 |
| Li2Opresent in later Li-aluminosilicate generations only | 0 – 5 | — |
| ZrO2durability / liquidus control | 0 – 2 | — |
| SnO2fining agent | 0 – 1 | 0.2 |
| CaOkept low, slows ion exchange | 0 – 0.5 | — |
| SiO2network former | ≥ 60 (balance) | — |
Gorilla Glass Chem Strengthened — frequently asked
What is Gorilla Glass Chem Strengthened used for?
Gorilla Glass Chem Strengthened is typically used for smartphone screens, tablet and laptop touch panel covers, wearable and smartwatch cover lenses, automotive interior display covers, appliance and HMI control panels and kiosk and POS touchscreens. In short: chemically strengthened glass.
What is the tensile strength of Gorilla Glass Chem Strengthened?
Gorilla Glass Chem Strengthened has a typical tensile strength of 350 MPa (50.8 ksi) — stronger than 90% of glass grades. Strength varies by condition: see the 5 listed tempers.
Is Gorilla Glass Chem Strengthened easy to machine?
Not especially — machinability is rated not recommended (3/100, worse than 97% of glass grades). Cut, drill and edge-finish only in the un-strengthened state using diamond scribe/CNC grinding or laser (filamentation) cutting; never machine after ion exchange or the compressive layer releases and the part shatters.
Can Gorilla Glass Chem Strengthened be welded?
Not weldable; join by optically clear adhesive (OCA), silicone gasketing or glass-frit/laser sealing to another glass in the annealed state.
What surface finishes work on Gorilla Glass Chem Strengthened?
Standard finishes are optical polish, HF-etched anti-glare, AR/AF (fluorosilane) coatings and screen-printed ceramic/organic borders; avoid strong alkaline cleaners and any HF-bearing chemistry.
Can Gorilla Glass Chem Strengthened be formed, bent or molded?
Flat sheet is fusion-drawn to final thickness (0.4–2 mm); 2.5D/3D shapes are hot-formed on graphite tooling near the softening point (~850–900 °C) and then ion-exchanged in molten KNO₃ at 380–460 °C.
What is the maximum service temperature of Gorilla Glass Chem Strengthened?
Gorilla Glass Chem Strengthened is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in Gorilla Glass Chem Strengthened?
Yes — Gorilla Glass Chem Strengthened is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- Corning Gorilla Glass 3 / Gorilla Glass 5 / Gorilla Glass Victus Product Information Sheets — Corning Incorporated (2021)
- ASM Engineered Materials Handbook, Vol. 4: Ceramics and Glasses — ASM International (1991)
- ASTM C1499 — Monotonic Equibiaxial Flexural Strength of Advanced Ceramics (ring-on-ring) — ASTM (2019)
- ASTM C1279 — Non-Destructive Photoelastic Measurement of Edge and Surface Stresses in Glass — ASTM (2021)
- Ion-exchange strengthening of alkali aluminosilicate glasses (Corning technical papers, Int. J. Appl. Glass Sci.) — Wiley / Corning (2016)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.