Overview
G10 is a high-pressure fiberglass laminate material manufactured by impregnating woven glass cloth with epoxy resin and compressing the layers under heat and pressure. It is widely recognized for its exceptional combination of mechanical strength, electrical insulation, dimensional stability, moisture resistance, and machinability.
G10 is one of the most commonly used industrial laminate materials and serves as the foundation for many electrical insulation and structural applications. It is also closely related to FR4, with the primary difference being that FR4 includes flame-retardant additives while standard G10 does not.
G10 is widely used in:
- Electrical Insulation Components
- PCB Substrates
- Industrial Machinery
- Aerospace Components
- Medical Equipment
- Knife Handles
- Structural Insulators
- Precision Mechanical Parts
Due to its excellent balance of performance and cost, G10 remains one of the most versatile engineering laminate materials available.
Material Specification
| Property | Value |
|---|---|
| Material Designation | G10 |
| Full Name | Glass Cloth Reinforced Epoxy Laminate |
| Material Family | Thermoset Composite Laminate |
| Reinforcement Material | Woven Glass Fiber |
| Resin System | Epoxy Resin |
| Density | 1.80–2.00 g/cm³ |
| Appearance | Green, Yellow, Natural |
| Standard Forms | Sheet, Plate, Rod, Tube |
Material Composition
G10 is manufactured from fiberglass fabric and epoxy resin.
| Component | Function |
|---|---|
| Glass Fiber Fabric | Structural Reinforcement |
| Epoxy Resin | Mechanical Bonding |
| Curing Agents | Crosslinking |
| Additives | Property Enhancement |
The combination of fiberglass and epoxy creates a highly durable engineering laminate.
Common G10 Grades
| Grade | Characteristics |
|---|---|
| Standard G10 | General Industrial Use |
| Natural G10 | Unpigmented Laminate |
| Colored G10 | Decorative Applications |
| Electrical Grade G10 | High Voltage Insulation |
| Precision Machining Grade G10 | Tight Tolerance Parts |
Mechanical Properties
Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 250–350 MPa |
| Flexural Strength | 350–550 MPa |
| Compressive Strength | 400–600 MPa |
| Elastic Modulus | 16–24 GPa |
| Impact Resistance | Excellent |
Mechanical Performance
| Property | Performance |
|---|---|
| Strength | Excellent |
| Stiffness | Excellent |
| Wear Resistance | Good |
| Dimensional Stability | Outstanding |
G10 provides excellent structural integrity even under demanding mechanical loads.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.80–2.00 g/cm³ |
| Water Absorption | <0.2% |
| Surface Hardness | High |
| Dimensional Stability | Outstanding |
| Moisture Resistance | Excellent |
The low moisture absorption contributes to long-term dimensional accuracy.
Thermal Properties
| Property | Value |
|---|---|
| Continuous Service Temperature | 130–140°C |
| Short-Term Temperature Resistance | Up to 180°C |
| Glass Transition Temperature (Tg) | 120–140°C |
| Thermal Conductivity | 0.25–0.35 W/m·K |
| Thermal Expansion | Low |
G10 performs reliably across a wide operating temperature range.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| G10 | 1.90 | 300 MPa |
| Aluminum 6061 | 2.70 | 310 MPa |
| Stainless Steel 304 | 8.00 | 515 MPa |
| FR4 | 1.85 | 300 MPa |
G10 provides excellent strength while remaining relatively lightweight.
Electrical Properties
Typical Values
| Property | Value |
|---|---|
| Dielectric Strength | 15–25 kV/mm |
| Dielectric Constant | 4.5–5.5 |
| Volume Resistivity | >10¹⁴ Ω·cm |
| Surface Resistivity | >10¹³ Ω |
| Arc Resistance | Excellent |
Electrical Performance
| Property | Performance |
|---|---|
| Electrical Insulation | Outstanding |
| High Voltage Resistance | Excellent |
| Electrical Stability | Excellent |
| Industrial Electrical Applications | Outstanding |
G10 is widely used as an electrical insulation material in industrial systems.
Moisture Resistance
| Property | Performance |
|---|---|
| Water Absorption | Very Low |
| Humidity Resistance | Excellent |
| Environmental Stability | Excellent |
| Outdoor Durability | Good |
The fiberglass-epoxy structure provides outstanding moisture resistance.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Water | Excellent |
| Oils & Greases | Excellent |
| Fuels | Good |
| Mild Acids | Good |
| Mild Alkalis | Good |
G10 performs well in many industrial environments.
Wear & Machining Performance
| Property | Performance |
|---|---|
| CNC Machining | Excellent |
| Drilling | Excellent |
| Milling | Excellent |
| Precision Tolerances | Excellent |
G10 is commonly selected for precision-machined industrial components.
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| CNC Machining | Outstanding |
| Waterjet Cutting | Excellent |
| Grinding | Excellent |
| Drilling | Excellent |
| Precision Fabrication | Outstanding |
G10 can be manufactured into complex shapes with high dimensional accuracy.
International Standards
| Standard | Equivalent |
|---|---|
| NEMA LI-1 | G10 |
| ASTM D709 | Applicable |
| UL Recognition | Available |
| RoHS | Compliant |
| REACH | Compliant |
Available Forms
| Product Type | Availability |
|---|---|
| G10 Sheet | Yes |
| G10 Plate | Yes |
| G10 Rod | Yes |
| G10 Tube | Yes |
| Machined Components | Yes |
Typical Applications
Electrical Industry
- Electrical Insulators
- Bus Bar Supports
- Transformer Components
- Switchgear Insulation
PCB Industry
- PCB Substrates
- Prototype Boards
- Electrical Backing Plates
Industrial Equipment
- Wear Plates
- Structural Supports
- Precision Components
- Mechanical Fixtures
Aerospace Industry
- Lightweight Insulators
- Structural Components
- Electrical Systems
Medical Industry
- Diagnostic Equipment
- Electrical Isolation Components
Consumer Products
- Knife Handles
- Tool Handles
- Sporting Equipment
Advantages
Excellent Electrical Insulation
Ideal for high-voltage and industrial electrical applications.
High Mechanical Strength
Provides structural performance comparable to some metals.
Outstanding Moisture Resistance
Maintains performance in humid environments.
Excellent Dimensional Stability
Suitable for precision engineering applications.
Easy Machining
Can be machined to tight tolerances.
Cost Effective
Offers excellent value compared with advanced composites.
Limitations
Not Flame Retardant
Standard G10 lacks the flame-retardant additives found in FR4.
Lower Temperature Capability Than Advanced Composites
Cannot match Polyimide or high-performance thermoplastics.
Brittle Compared with Engineering Plastics
May chip under severe impact loads.
Fiberglass Dust During Machining
Requires proper dust extraction and safety procedures.
Comparison with Engineering Materials
| Property | G10 | FR4 | Fiberglass | Carbon Fiber |
|---|---|---|---|---|
| Electrical Insulation | Outstanding | Outstanding | Excellent | Poor |
| Mechanical Strength | Excellent | Excellent | Excellent | Outstanding |
| Flame Retardancy | No | Yes | Depends on Resin | Depends on Resin |
| Cost | Moderate | Moderate | Low | High |
| Machinability | Excellent | Excellent | Good | Good |
Comparison with FR4
| Property | G10 | FR4 |
|---|---|---|
| Flame Retardancy | No | |
| Electrical Properties | Similar | |
| Mechanical Strength | Similar | |
| Moisture Resistance | Similar | |
| Industrial Applications | Excellent |
G10 and FR4 are structurally very similar, with flame-retardant performance being the primary difference.
Available Surface Finishes
Standard Finishes
- Natural Finish
- Green Finish
- Matte Finish
Functional Finishes
- Precision Ground Surface
- Electrical Grade Surface
- Industrial Laminate Surface
Specialty Configurations
- G10 Sheet
- G10 Plate
- G10 Rod
- Electrical Grade G10
- Machining Grade G10
Frequently Asked Questions (FAQ)
What is G10?
G10 is a fiberglass-reinforced epoxy laminate material widely used for electrical insulation and structural applications.
What is G10 used for?
Typical applications include:
- Electrical Insulators
- PCB Substrates
- Industrial Components
- Knife Handles
- Aerospace Parts
Is G10 electrically insulating?
Yes. G10 provides excellent dielectric strength and electrical insulation performance.
Is G10 waterproof?
G10 has extremely low water absorption and excellent moisture resistance.
Is G10 strong?
Yes. G10 offers excellent mechanical strength and rigidity for engineering applications.
Why choose G10?
Because it combines:
- High Mechanical Strength
- Excellent Electrical Insulation
- Moisture Resistance
- Dimensional Stability
- Easy Machining
What is the difference between G10 and FR4?
FR4 is essentially a flame-retardant version of G10, while standard G10 does not contain flame-retardant additives.
Does GCNOV provide G10 machining services?
Yes. GCNOV provides:
- G10 Component Manufacturing
- CNC Machining Services
- Electrical Insulation Parts
- Precision Industrial Components
- Prototype Development
- Low-Volume Production
- Mass Production