High Heat Composite · Glass Fiber Reinforced Polymer
G7
G7 is a high heat composite composite — silicone-glass thermal laminate. Typical values: 110 MPa yield, 1.7 g/cm³, rated to 220 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values in the Silicone Matrix condition. Metric first, imperial in gray. The bars show where G7 sits against the other 12 composite grades in the catalog.
Datasheet
| Yield strength | 110 MPa16 ksi |
|---|---|
| Tensile strength | 100 MPa15 ksi |
| Hardness | 100 HRM |
| Density | 1.7 g/cm³0.061 lb/in³ |
| Specific strength (yield ÷ density) | 65 |
| Min service temp | -50 °C-58 °F |
| Max service temp | 220 °C428 °F |
| Electrical conductivity | < 0.001 % IACSinsulator |
| Machinability | Very good75 / 100 |
| Weldability | Not recommended5 / 100 |
| Formability | Not recommended5 / 100 |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other composite grades
Strength versus weight in the composite family
Yield strength against density for every composite grade FabDigit runs. G7 is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to G7. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Better75 / 100 |
|---|---|
| Cutting speed (rough / finish) | — / — |
| Minimum wall | — |
| Minimum internal radius | — |
| Drill depth limit | — |
| Best surface (machined / polished) | Ra — / — |
| Hardenable after machining | — |
Sheet metal
| Formability | Not Recommend5 / 100 |
|---|---|
| Weldability | Not Recommend5 / 100 |
Conditions and tempers
How G7 is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Silicone MatrixDefault Matrix | Insulates past 200 °C — high-temperature electrical | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on G7, ranked by how often they make sense for this grade.
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for G7
Coatings and treatments compatible with composite on the processes G7 runs on. Pick them in the quote configurator or call them out on the drawing.
Organic Coating
- Painting
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Vibro Engraving / Scribing
Equivalent designations
Standards and trade names that resolve to G7 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Silicone Glass Laminate
- Other
- Garolite G7
Stock forms
Raw-material forms FabDigit sources G7 in.
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.