FabDigit

N-SF11 vs N-LaK9 vs IRG 24 vs SF6

Benchmark · 4 materials

Side-by-side benchmark of 4 glass grades.

N-SF11 vs N-LaK9 and 2 more: properties

N-SF11N-LaK9IRG 24SF6

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

92 GPa13.3 Msi
110 GPa16 Msi
18.3 GPa2.7 Msi
55 GPa8 Msi

Shear Modulus

36.6 GPa5.3 Msi
42.7 GPa6.2 Msi
7.1 GPa1 Msi
22 GPa3.2 Msi

Bulk Modulus

63 GPa9.1 Msi
86 GPa12.5 Msi
14 GPa2.1 Msi
36 GPa5.2 Msi

Poisson's Ratio

0.26
0.29
0.29
0.24

Tensile Strength (Ultimate)

45 MPa6.5 ksi
55 MPa8 ksi
16 MPa2.3 ksi
40 MPa5.8 ksi

Elongation at Break

0%
0%

Compressive Strength

900 MPa131 ksi
1,000 MPa145 ksi
200 MPa29 ksi
900 MPa131 ksi

Flexural Strength

60 MPa8.7 ksi
70 MPa10.2 ksi
18 MPa2.6 ksi
55 MPa8 ksi

Shear Strength

35 MPa5.1 ksi

Fracture Toughness (K_IC)

0.7 MPa·√m0.64 ksi·√in
0.8 MPa·√m0.73 ksi·√in
0.17 MPa·√m0.15 ksi·√in
0.6 MPa·√m0.55 ksi·√in

Hardness, Vickers

470 HV
640 HV
110 HV
350 HV

Hardness, Knoop

450 HK
680 HK
104 HK
310 HK

Hardness, Mohs

5.5
6
2.5
5

Physical

Density and transition temperatures.

Density

3.2 g/cm³0.12 lb/in³
3.51 g/cm³0.13 lb/in³
4.64 g/cm³0.17 lb/in³
5.18 g/cm³0.19 lb/in³

Refractive Index

1.785
1.691
2.79
1.805

Light Transmission

100%
100%
67%
84%

Same in both: Porosity 0%

Thermal

How each material carries heat and how hot it can run.

Thermal Conductivity

0.75 W/m·K0.43 BTU/hr·ft·°F
0.9 W/m·K0.52 BTU/hr·ft·°F
0.2 W/m·K0.12 BTU/hr·ft·°F
0.67 W/m·K0.39 BTU/hr·ft·°F

Specific Heat Capacity

630 J/kg·K0.15 BTU/lb·°F
510 J/kg·K0.12 BTU/lb·°F
340 J/kg·K0.08 BTU/lb·°F
389 J/kg·K0.09 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

8.5 µm/m·K4.7 µin/in·°F
6.3 µm/m·K3.5 µin/in·°F
20.7 µm/m·K11.5 µin/in·°F
8.1 µm/m·K4.5 µin/in·°F

Max Service Temperature (continuous)

400°C752 °F
500°C932 °F
120°C248 °F
350°C662 °F

Min Service Temperature

-200°C-328 °F
-60°C-76 °F
-100°C-148 °F
-100°C-148 °F

Electrical

Conductivity and insulation.

Electrical Resistivity

1×10¹² Ω·m3.94×10¹⁹ µΩ·in
1×10¹¹ Ω·m3.94×10¹⁸ µΩ·in
1×10¹¹ Ω·m3.94×10¹⁸ µΩ·in

Volume Resistivity

1×10¹⁴ Ω·cm
1×10¹⁴ Ω·cm
1×10¹³ Ω·cm
1×10¹³ Ω·cm

Dielectric Constant (1 MHz)

8.5
8.5
9

Dielectric Strength

20 kV/mm508 V/mil

Dissipation Factor (1 MHz)

0.001

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Corrosion Resistance

60 / 100
62 / 100
55 / 100
45 / 100

Manufacturability

FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.

Machinability

15 / 100
12 / 100
85 / 100
15 / 100

Polishability

85 / 100
85 / 100
85 / 100
88 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

60 MJ/kg25,795 BTU/lb
60 MJ/kg25,795 BTU/lb
45 MJ/kg19,347 BTU/lb

Embodied Carbon (primary production)

4 kg CO₂/kg
4.5 kg CO₂/kg
3 kg CO₂/kg

Embodied Water

30 L/kg3.6 gal/lb
120 L/kg14.4 gal/lb
80 L/kg9.6 gal/lb

Typical Recycled Content

20%
20%
10%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

14 kN·m/kg
16 kN·m/kg
3 kN·m/kg
8 kN·m/kg

Specific Stiffness (E / density)

28.8 MN·m/kg
31.3 MN·m/kg
3.9 MN·m/kg
10.6 MN·m/kg

Thermal Diffusivity

0.4 mm²/s
0.5 mm²/s
0.1 mm²/s
0.3 mm²/s

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.

501002005002.533.5Density (g/cm³)Yield strength (MPa) — log scale

Manufacturing and finishing

CapabilityN-SF11N-LaK9IRG 24SF6
Default condition
Relative cost$$$$ High$$$$ High$$$$ High$$$$ High
Min. machined wall
Best machined surface

Ready to make it?

Upload a CAD file and FabDigit prices the part in N-SF11 and N-LaK9 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.