Vycor 7913
also Corning 7913
Vycor 7913 is a 96% silica glass produced by phase-separating and acid-leaching a borosilicate precursor (the porous 7930 stage) and then consolidating it, giving thermal and chemical behaviour close to fused silica at lower processing cost.
Reference datasheet — Vycor 7913 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the 7913 condition
Vycor 7913 tempers and conditions
Vycor 7913 is supplied in 3 conditions, soft to hard. 7913 is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
7930 | Use the acid-leached, unconsolidated porous intermediate with nanoscale connected channels for chromatography and catalyst supports, doping matrices and optical or sensor impregnation; limit to 550 °C. | 20 | 0 | 350 HV | 0.6 W/m·K | |
7913Default Consolidated 96% SiO₂ high-silica glass | Pick the standard consolidated 96% SiO₂ grade for windows, tubing and furnace parts needing near-quartz expansion and thermal shock resistance, yet formable by conventional glass processes. | 50 | 620 HV | 1 W/m·K | ||
99%+ SiO₂ | Choose the extended-leach, fully vitrified variant when service to 1100 °C, lower dielectric loss or better alkali and steam resistance is needed; residual B₂O₃ and alkali are minimal. | 55 | 700 HV | 1 W/m·K |
What is Vycor 7913?
Vycor 7913 is a 96% silica glass produced by phase-separating and acid-leaching a borosilicate precursor (the porous 7930 stage) and then consolidating it, giving thermal and chemical behaviour close to fused silica at lower processing cost. It is used up to 900 °C in lamp envelopes, aerospace windows, laboratory ware and optical filters, with density 2.18 g/cm³, 67 GPa modulus, about 50 MPa tensile strength and 1.35 W/m·K thermal conductivity. Chemical resistance is high (95), but the leach-and-consolidate route costs more than borosilicate and shrinks the part about 14%, which tooling must allow for; fused quartz is the next step up in temperature. Vycor 7913 has a density of 2.18 g/cm³ (0.0788 lb/in³), lighter than 97% of glass grades. It melts at 1,500°C (2,732 °F). Vycor 7913 has a tensile strength of 50 MPa (7.25 ksi), stronger than 59% of glass grades. Elongation at break is 0% and the elastic modulus is 67 GPa (9.72 Msi).
What is Vycor 7913 used for?
- high-temperature lamp envelopes
- aerospace windows
- laboratory ware
- optical filters
Advantages
- Lightweight — 2.18 g/cm³ (0.0788 lb/in³), better than 97% of glass grades
- Good corrosion resistance — 95/100, better than 92% of glass grades
- High service temperature — 900°C (1,652 °F), better than 86% of glass grades
Vycor 7913 properties
Typical room-temperature values for Vycor 7913-7913; bars are the position among glass grades.
Physical5
Vycor 7913 has a density of 2.18 g/cm³ (0.0788 lb/in³), lighter than 97% of glass grades. It melts at 1,500°C (2,732 °F).
Mechanical13
Vycor 7913 has a tensile strength of 50 MPa (7.25 ksi), stronger than 59% of glass grades. Elongation at break is 0% and the elastic modulus is 67 GPa (9.72 Msi).
Thermal5
Vycor 7913 is rated for continuous service to 900°C (1,652 °F). It conducts heat at 1.4 W/m·K (0.78 BTU/hr·ft·°F), better than 51% of glass grades. Thermal expansion is 0.8 µm/m·K (0.444 µin/in·°F).
Electrical5
Vycor 7913 is an electrical insulator with a dielectric strength of 30 kV/mm (762 V/mil) and a resistivity of 1×10¹³ Ω·m.
Chemical & Environmental2
Corrosion resistance is excellent (95/100), better than 92% of glass grades.
Sustainability4
Producing a kilogram of Vycor 7913 takes about 60 MJ of energy and emits 4.5 kg of CO₂ — more than 58% of glass grades. Typical recycled content is 0%.
Manufacturability3
Vycor 7913's machinability is poor (18/100, better than 52% 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.
Strength versus weight in the glass family
Yield strength against density for every glass grade FabDigit runs. Vycor 7913 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Vycor 7913
Is Vycor 7913 easy to machine?
Diamond grinding, ultrasonic machining or laser processing only; run wet and leave finish-grind stock to remove the subsurface crack layer.
Can Vycor 7913 be welded?
Glass sealing is done with an oxy-hydrogen or plasma flame. It fuses to fused silica, but joining to borosilicate needs graded transition seals because of the large expansion mismatch.
Can Vycor 7913 be formed, bent or molded?
The borosilicate precursor is formed by normal glass processes, then phase-separated, acid-leached and densified at 1200 °C; the part shrinks about 14%, so tooling must be scaled up by the shrinkage factor.
Vycor 7913 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 |
|---|---|---|
| B2O3residual boron not fully leached out | 2 – 3.5 | 2.9 |
| Al2O3 | 0.2 – 0.6 | 0.4 |
| Na2Oresidual alkali, controls high-temperature resistivity | 0 – 0.1 | 0.04 |
| ZrO2 + other oxidestrace | 0 – 0.3 | 0.1 |
| SiO2residual skeleton after leaching | ≥ 95 (balance) |
What surface finishes work on Vycor 7913?
Fire polishing or mechanical and chemical polishing gives optical surfaces; HF etching removes the damaged surface layer but thins the part significantly.
Equivalent designations
Standards and trade names that resolve to Vycor 7913 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Corning 7913
- Also called
- 96% Silica Glass
How much does Vycor 7913 cost?
Vycor 7913 is a high-cost glass ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Vycor 7913 — frequently asked
What is Vycor 7913 used for?
Vycor 7913 is typically used for high-temperature lamp envelopes, aerospace windows, laboratory ware and optical filters. In short: near-fused-silica performance; 900 °C service ceiling; cheaper route than fused quartz.
What is the tensile strength of Vycor 7913?
Vycor 7913 has a typical tensile strength of 50 MPa (7.25 ksi) — stronger than 59% of glass grades. Strength varies by condition: see the 3 listed tempers.
Is Vycor 7913 easy to machine?
Not especially — machinability is rated poor (18/100, better than 52% of glass grades). Diamond grinding, ultrasonic machining or laser processing only; run wet and leave finish-grind stock to remove the subsurface crack layer.
Can Vycor 7913 be welded?
Glass sealing is done with an oxy-hydrogen or plasma flame. It fuses to fused silica, but joining to borosilicate needs graded transition seals because of the large expansion mismatch.
What surface finishes work on Vycor 7913?
Fire polishing or mechanical and chemical polishing gives optical surfaces; HF etching removes the damaged surface layer but thins the part significantly.
Can Vycor 7913 be formed, bent or molded?
The borosilicate precursor is formed by normal glass processes, then phase-separated, acid-leached and densified at 1200 °C; the part shrinks about 14%, so tooling must be scaled up by the shrinkage factor.
What is the maximum service temperature of Vycor 7913?
Vycor 7913 is rated for continuous use to about 900°C (1,652 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does Vycor 7913 cost?
Vycor 7913 is a high-cost glass ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- Vycor Brand 96% Silica Glass, Code 7913 / 7930 product information — Corning Incorporated (2015)
- IEC 60672-3 Ceramic and glass insulating materials — Part 3: Specifications for individual materials (Types G-795, G-799) — IEC (1997)
- Engineered Materials Handbook Vol. 4: Ceramics and Glasses — ASM International (1991)
- Properties of Glass-Forming Melts / Silica glass property compilations — CRC Press (2005)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.