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When Ryertex G10 Is the Right Choice – and When FR4 May Be Better

The global shift toward high-efficiency power systems and precision engineering requires materials that can withstand extreme dielectric stress and mechanical loads. Industrial manufacturers across the aerospace, energy, and electronics sectors increasingly rely on high-pressure laminates to maintain system integrity while reducing weight. In these demanding environments, material selection directly impacts long-term reliability and safety.

WS Hampshire is a premier fabricator and distributor of non-metallic materials, specializing in high-performance thermoset laminates for industrial and power distribution applications. We provide custom-machined solutions that meet the rigorous mechanical and dielectric requirements of modern engineering.

Learn more about the properties of Ryertex G10, its applications in structural insulation, and how it compares to flame-retardant alternatives like FR4.

The Properties and Advantages of Ryertex G10

Ryertex G10 is a widely specified rigid electrical insulation material for several functional reasons. This glass-epoxy laminate provides a reliable balance of dielectric strength, mechanical toughness, and dimensional stability. It serves as a cost-effective solution for structural parts that do not require flame-retardant properties.

A primary technical distinction exists between G10 and FR4. While FR4 utilizes brominated epoxy chemistry to achieve a UL 94 V-0 flame rating, G10 is typically a non-brominated material. This difference is critical for systems sensitive to chemical contamination or outgassing.

Common Applications for Ryertex G10

Engineers often select Ryertex G10 when a part must maintain tight tolerances and structural integrity under constant load. It is a preferred choice for the following components:

• Support blocks and spacers. These parts benefit from the material’s high compressive strength.
• Terminal boards and insulating plates. G10 delivers dependable dielectric insulation in moderate environments.
• Cryogenic and vacuum systems. Because it lacks brominated flame retardants, G10 reduces the risk of outgassing in sensitive or tightly enclosed environments.

G10 vs. FR4: Selecting the Right Material

The decision between G10 and FR4 depends on the specific operating environment rather than a “default” choice. While FR4 is necessary when safety regulations mandate flame retardancy, its brominated chemistry can pose risks. Under conditions of extreme heat or electrical arcing, the bromine in FR4 can generate hydrogen bromide smoke. This byproduct is potentially corrosive to copper, stainless steel, and other metallic system components.

If your application involves high-temperature cycles or requires a higher performance margin, materials such as Ryertex G11 or Ryertex FR5 may be more suitable. NASA’s guidance on outgassing emphasizes that designers should verify material suitability through testing rather than relying on the grade name alone.

Custom Machining at WS Hampshire

At WS Hampshire, we machine Ryertex G10 into precision components tailored to your industrial requirements. Our facility produces complex shapes and repeatable, tight-tolerance parts that perform reliably in the field. We assist our customers in evaluating whether a non-brominated material like G10 or a flame-retardant grade like FR4 represents the safer long-term choice for their specific system.

Contact us today to learn more about how our Ryertex solutions can enhance your operations or to inquire about custom components.

Choosing the Right Mechanical Plastic: Acetal, PET, Nylon, or PEEK?

Selecting the right engineering plastic for bearing and wear applications can make or break your machinery’s performance. Factors like moisture, temperature, and friction dictate which polymer will survive in your specific environment.

To simplify your selection process, here is a breakdown of four of the most heavily utilized engineering plastics, their distinct benefits, and where they excel.

Acetal (Copolymer & Homopolymer)

Acetal is a go-to workhorse for precise components, particularly in damp environments.

• The Benefits: Acetal provides excellent dimensional stability. It is exceptionally ideal for wear applications in wet environments.
• The Limitations: It experiences excessive wear in dry applications.
• Top Applications: Bearing and wear parts, pump parts, gears, solenoid blocks, and dispensing heads. It is heavily utilized in the food processing, medical, and paper processing industries.

PET (Polyethylene Terephthalate)

PET bridges the gap between the strengths of Acetal and Nylon.

• The Benefits: PET combines the excellent wear resistance of Nylon with the superior dimensional stability of Acetal. Unlike Acetal, PET wears well in both wet and dry environments.
• The Limitations: It is inherently a brittle material.
• Top Applications: Scrapers, plungers, tension wheels, valves, and bottling equipment.

Nylon

Nylon is legendary for its toughness, but requires careful environmental consideration.

• The Benefits: In dry applications, Nylon dramatically outwears Acetal by a factor of 3:1.
• The Limitations: Nylon readily absorbs moisture. If used in wet environments, this moisture absorption results in excessive wear and potential tolerance issues due to swelling.
• Top Applications: Bushings, rollers, star wheels, slide pads, and chain guides in construction and conveying equipment.

PEEK (Polyetheretherketone)

When environments get extreme, PEEK is the premier high-performance choice.

• The Benefits: PEEK offers incredible chemical resistance and stability, excellent wear resistance, and a continuous use temperature of up to 480°F.
• The Limitations: It carries a typically much higher cost compared to other standard mechanical plastics
• Top Applications: Valve seats, insulators, pump wear rings, and wafers. It is highly sought after in semiconductor, chemical processing, and high-heat transportation applications.

Need Help Selecting the Right Material?

Choosing between Acetal, PET, Nylon, and PEEK ultimately comes down to the specifics of your operating environment, such as moisture levels , continuous use temperatures , and whether you require dry or wet wear resistance.

At W.S. Hampshire, we specialize in helping engineers select, machine, and fabricate the perfect non-metallic materials for demanding applications. Our team can help you navigate the “word games” of material data sheets and ensure you are using the correct test criteria for your specific industry requirements.

Contact us today to discuss your project or request a material recommendation.