• Stainless Steel: 304, 316, 410, 17-4 PH

• Machinability: Lower than aluminum; requires high-speed steel (HSS) or carbide tools.

• Applications: Medical implants, food processing equipment, marine components.

• PEEK: High-temperature resistance, chemical inertness; medical implants, aerospace parts.

• PEEK bridges the gap between plastics and metals, offering metallic strength with polymer benefits (lightweight, corrosion resistance, and design flexibility). Its dominance in critical sectors like healthcare and aerospace underscores its irreplaceability for applications demanding reliability under extreme conditions.

  For CNC machining projects, PEEK is ideal when:

  1. Tolerances must remain stable at 200°C+.

  2. Chemical exposure (e.g., sterilization agents) is frequent.

  3. Weight reduction is critical (e.g., aerospace components).

  4. Biocompatibility is non-negotiable (e.g., medical devices).

Conclusion

G-10 balances mechanical robustness, electrical insulation, and chemical resistance, making it a staple in industries where FR-4 or metals fall short. Its cost-effectiveness and machinability suit both prototyping and high-volume production.

For CNC projects, G-10 is ideal when:

Parts require rigidity and impact resistance (e.g., tool fixtures).

Electrical insulation is critical (e.g., transformer bases).

Corrosion resistance in wet or chemical environments is needed (e.g., marine hardware).

Key Characteristics of G-10 Material

1. Exceptional Mechanical Robustness

• High Strength-to-Weight Ratio: Tensile strength up to 172 MPa rivals aluminum but with 40% less density, making it ideal for lightweight yet durable components (e.g., aircraft brackets, knife handles).

• Impact & Fatigue Resistance: Withstands repeated loading without cracking, suitable for CNC machine fixtures and marine hardware subjected to vibration.

• Stiffness: Flexural modulus of ~4.5–5.5 GPa minimizes deflection in structural parts like wind turbine insulators.

2. Superior Electrical Insulation

• High Dielectric Strength: 14–16 kV/mm prevents electrical breakdown in high-voltage applications (transformers, PCB substrates).

• Low Electrical Conductivity: Volume resistivity >10¹⁴ Ω·cm ensures minimal current leakage in semiconductor equipment and EV battery systems.

• Arc Resistance: Resists electrical arcing for 180–200 seconds, critical for switchgear and circuit breakers.

3. Outstanding Environmental Stability

• Chemical Inertness: Immune to saltwater, acids, hydrocarbons (gasoline), and most solvents, making it suitable for marine (ROV frames) and chemical processing (tank liners).

• Low Moisture Absorption: <0.15% water uptake (24 hr) outperforms FR-4 in humid environments (e.g., underwater electronics).

• UV & Radiation Resistance: Maintains properties after prolonged sunlight or radiation exposure (satellite components, solar panel mounts).

4. Thermal Performance

• Moderate Heat Resistance: Continuous service at 130–150°C (266–302°F), suitable for EV motor brackets and transformer insulators.

• Low Thermal Expansion: CTE of 12–16 ppm/°C matches metals, reducing thermal stress in aerospace and automotive assemblies.

• Heat Deflection Stability: HDT of 140–150°C ensures rigidity under thermal loading (e.g., industrial oven components).

5. Machinability & Fabrication Flexibility

• Easy Processing: Cuts, drills, and mills with standard tools (minimal burrs), enabling precise parts for medical instruments and electronics.

• Bonding Compatibility: Adheres well to epoxies, metals, and composites, supporting layered structures (e.g., PCB laminates).

• Customizable Appearance: Available in colors (typically green) with smooth, non-porous surfaces for aesthetic or functional needs.

6. Cost-Effective High-Performance Solution

• Price Positioning: Priced 20–30% higher than FR-4 but offers 30–50% better mechanical properties, justifying use in reliability-critical sectors (aerospace, defense).

• Longevity: Reduces maintenance costs in harsh environments (e.g., marine, chemical plants) due to corrosion resistance.

7. Industry-Specific Differentiators

• Non-Magnetic & Radiolucent: Safe for MRI equipment and X-ray compatible (medical surgical tools, aerospace radar housings).

• Autoclave Suitability: Withstands 134°C sterilization cycles, meeting medical device standards.

• Non-Conductive & Non-Sparking: Ideal for explosive environments (oil refineries, mining equipment).

8. Limitations to Note

• Limited Fire Resistance: Requires flame-retardant additives for fire-prone applications (e.g., automotive interiors).

• Cold Brittleness: Impact strength decreases below -40°C, unsuitable for cryogenic use.

• Not Biocompatible: Not approved for implantable medical devices (restricted to external tools).