Duran ANN vs Duran CS
Glass · Duran temper comparison
Duran ANN and Duran CS are two conditions of the same glass grade, Duran: ANN (annealed) versus CS (chemically strengthened). The chemistry is identical, so every difference below comes from the condition. Duran CS is the stronger of the two: tensile strength 120 MPa (17.4 ksi) against 35 MPa (5.08 ksi) for Duran ANN, about 3.4 times as much. Duran ANN runs hotter in service (450°C vs 350°C continuous).
Duran ANNChoose it when the part sees heat.
Duran CSChoose it when strength drives the design.
Duran ANN vs Duran CS: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all glass grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all glass grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Flexural Strength
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 64 GPa9.3 Msi · Shear Modulus 26.7 GPa3.9 Msi · Bulk Modulus 36 GPa5.2 Msi · Poisson's Ratio 0.2 · Elongation at Break 0% · Compressive Strength 1,000 MPa145 ksi · Fracture Toughness (K_IC) 0.75 MPa·√m0.68 ksi·√in · Hardness, Knoop 480 HK · Hardness, Mohs 5.5
Physical
Density and transition temperatures.
Same in both: Density 2.23 g/cm³0.08 lb/in³ · Refractive Index 1.473 · Light Transmission 92% · Porosity 0%
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 1.2 W/m·K0.69 BTU/hr·ft·°F · Specific Heat Capacity 830 J/kg·K0.2 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 3.3 µm/m·K1.8 µin/in·°F · Min Service Temperature -70°C-94 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹³ Ω·m3.94×10²⁰ µΩ·in · Dielectric Strength 25 kV/mm635 V/mil · Dielectric Constant (1 MHz) 4.6 · Dissipation Factor (1 MHz) 0.0037 · Volume Resistivity 1×10¹⁵ Ω·cm
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Polishability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 27 MJ/kg11,608 BTU/lb · Embodied Carbon (primary production) 1.8 kg CO₂/kg · Embodied Water 15 L/kg1.8 gal/lb · Typical Recycled Content 8%
Strength versus weight
Yield strength against density for every glass grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Duran ANN vs Duran CS — frequently asked
Is Duran CS stronger than Duran ANN?
Yes. Duran CS has a typical tensile strength of 120 MPa (17.4 ksi) against 35 MPa (5.08 ksi) for Duran ANN — about 3.4 times as much.
Which condition does FabDigit quote by default, ANN or CS?
ANN is the default Duran condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, Duran ANN or Duran CS?
Duran ANN, by a small margin. Both rate not recommended for machinability — 10/100 against 4/100 for Duran CS.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Duran ANN and Duran CS side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.