HPFS 7980 vs Vycor 7913
Glass · grade comparison
HPFS 7980 and Vycor 7913 are both glass grades. HPFS 7980 is harder — 800 HV against 620 HV for Vycor 7913 — which matters for wear surfaces and threads. HPFS 7980 is stiffer (72.7 GPa vs 67 GPa).
HPFS 7980Choose it when surface hardness matters.
HPFS 7980 vs Vycor 7913: 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
Flexural Strength
Hardness, Vickers
Hardness, Knoop
Shear Strength
Same in both: Tensile Strength (Ultimate) 50 MPa7.3 ksi · Elongation at Break 0% · Compressive Strength 1,100 MPa160 ksi · Fracture Toughness (K_IC) 0.72 MPa·√m0.66 ksi·√in · Hardness, Mohs 6
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
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)
Same in both: Max Service Temperature (continuous) 900°C1,652 °F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Volume Resistivity
Same in both: Dielectric Strength 30 kV/mm762 V/mil
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 95 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Polishability
Sintering / Firing Temperature
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Stiffness (E / density)
Thermal Shock Resistance Index
Same in both: Specific Strength (UTS / density) 23 kN·m/kg · Thermal Diffusivity 0.8 mm²/s
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 | HPFS 7980 | Vycor 7913 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
HPFS 7980 vs Vycor 7913 — frequently asked
What is the difference between HPFS 7980 and Vycor 7913?
HPFS 7980 and Vycor 7913 are both glass grades. HPFS 7980 is harder — 800 HV against 620 HV for Vycor 7913 — which matters for wear surfaces and threads. HPFS 7980 is stiffer (72.7 GPa vs 67 GPa).
Which is cheaper, HPFS 7980 or Vycor 7913?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, HPFS 7980 or Vycor 7913?
Vycor 7913. Its machinability rates poor (18/100) against not recommended (12/100) for HPFS 7980.
Ready to make it?
Upload a CAD file and FabDigit prices the part in HPFS 7980 and Vycor 7913 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.