N-LaK9 vs N-SF11
Glass · grade comparison
N-LaK9 and N-SF11 are both glass grades. N-LaK9 is the stronger of the two: tensile strength 55 MPa (7.98 ksi) against 45 MPa (6.53 ksi) for N-SF11, about 22% more. N-LaK9 is harder — 640 HV against 470 HV for N-SF11 — which matters for wear surfaces and threads. N-SF11 is lighter (3.2 g/cm³ vs 3.51 g/cm³ for N-LaK9) and N-LaK9 is stiffer (110 GPa vs 92 GPa).
N-LaK9Choose it when strength drives the design, or when surface hardness matters.
N-SF11Choose it when weight is the constraint.
N-LaK9 vs N-SF11: 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.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Compressive Strength
Flexural Strength
Fracture Toughness (K_IC)
Hardness, Vickers
Hardness, Knoop
Hardness, Mohs
Elongation at Break
Shear Strength
Physical
Density and transition temperatures.
Density
Refractive Index
Light Transmission
Same in both: Porosity 0%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Dielectric Constant (1 MHz)
Electrical Resistivity
Same in both: Volume Resistivity 1×10¹⁴ 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 85 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Same in both: Embodied Energy (primary production) 60 MJ/kg25,795 BTU/lb · Typical Recycled Content 20%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 0
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.
Manufacturing and finishing
| Capability | N-LaK9 | N-SF11 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
N-LaK9 vs N-SF11 — frequently asked
Is N-LaK9 stronger than N-SF11?
Yes. N-LaK9 has a typical tensile strength of 55 MPa (7.98 ksi) against 45 MPa (6.53 ksi) for N-SF11 — about 22% more.
Which is cheaper, N-LaK9 or N-SF11?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose N-LaK9 over N-SF11?
Pick N-LaK9 when strength drives the design, or when surface hardness matters. Pick N-SF11 when weight is the constraint.
Ready to make it?
Upload a CAD file and FabDigit prices the part in N-LaK9 and N-SF11 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.